Score = 82.8 bits (203), Expect = 5e-16, Method: Compositional matrix adjust.
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
Receptor for glutamate. The activity of this receptor is mediated by a G-protein that activates a phosphatidylinositol-calcium second messenger system. May participate in the central action of glutamate in the CNS, such as long-term potentiation in the hippocampus and long-term depression in the cerebellum. Homo sapiens (taxid: 9606)
Score = 82.8 bits (203), Expect = 6e-16, Method: Compositional matrix adjust.
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
Receptor for glutamate. The activity of this receptor is mediated by a G-protein that activates a phosphatidylinositol-calcium second messenger system. May participate in the central action of glutamate in the CNS, such as long-term potentiation in the hippocampus and long-term depression in the cerebellum.
Score = 82.8 bits (203), Expect = 6e-16, Method: Compositional matrix adjust.
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
Receptor for glutamate. The activity of this receptor is mediated by a G-protein that activates a phosphatidylinositol-calcium second messenger system. May participate in the central action of glutamate in the CNS, such as long-term potentiation in the hippocampus and long-term depression in the cerebellum.
Score = 198 (74.8 bits), Expect = 1.4e-14, P = 1.4e-14
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
Score = 198 (74.8 bits), Expect = 1.5e-14, P = 1.5e-14
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
Score = 198 (74.8 bits), Expect = 2.1e-14, P = 2.1e-14
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
Score = 198 (74.8 bits), Expect = 2.1e-14, P = 2.1e-14
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 292 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 351
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 352 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 379
Score = 198 (74.8 bits), Expect = 2.1e-14, P = 2.1e-14
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
GO:0000186 "activation of MAPKK activity" evidence=IDA
GO:0000187 "activation of MAPK activity" evidence=IDA
Score = 198 (74.8 bits), Expect = 2.1e-14, P = 2.1e-14
Identities = 37/88 (42%), Positives = 55/88 (62%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 287 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 346
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
VR FD+YFL L ++ N R+PWF E Q+
Sbjct: 347 VRSFDDYFLKLRLDTNTRNPWFPEFWQH 374
GO:0000186 "activation of MAPKK activity" evidence=ISO
GO:0000187 "activation of MAPK activity" evidence=ISO
Score = 123 bits (310), Expect = 2e-34
Identities = 40/85 (47%), Positives = 59/85 (69%)
Query: 22 GVIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQAN 81
V++F + ++ G++ A +R+NA G+F W+ SDGW AR V +G E EG ++++ Q+
Sbjct: 233 VVVLFCREDDIRGLLAAAKRLNAEGHFQWIASDGWGARNSVVEGLEDVAEGAITIELQSA 292
Query: 82 PVRGFDEYFLNLTVENNRRDPWFIE 106
V GFDEYFL+LT ENN R+PWF E
Sbjct: 293 EVPGFDEYFLSLTPENNSRNPWFRE 317
Ligand binding domain of the metabotropic glutamate receptors (mGluR), which are members of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into cellular responses. mGluRs bind to glutamate and function as an excitatory neurotransmitter; they are involved in learning, memory, anxiety, and the perception of pain. Eight subtypes of mGluRs have been cloned so far, and are classified into three groups according to their sequence similarities, transduction mechanisms, and pharmacological profiles. Group I is composed of mGlu1R and mGlu5R that both stimulate PLC hydrolysis. Group II includes mGlu2R and mGlu3R, which inhibit adenylyl cyclase, as do mGlu4R, mGlu6R, mGlu7R, and mGlu8R, which form group III. Length = 452
>gnl|CDD|107369 cd06374, PBP1_mGluR_groupI, Ligand binding domain of the group I metabotropic glutamate receptor
Score = 87.6 bits (217), Expect = 2e-21
Identities = 36/87 (41%), Positives = 52/87 (59%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G F +GSDGW+ R V +G E E EG ++++ Q+
Sbjct: 249 VVCFCEGMTVRGLLMAMRRLGVGGEFQLIGSDGWADRDDVVEGYEEEAEGGITIKLQSPE 308
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQ 109
V FD+Y+L L E N R+PWF E Q
Sbjct: 309 VPSFDDYYLKLRPETNTRNPWFREFWQ 335
Ligand binding domain of the group I metabotropic glutamate receptor, a family containing mGlu1R and mGlu5R, all of which stimulate phospholipase C (PLC) hydrolysis. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes. Length = 472
>gnl|CDD|107370 cd06375, PBP1_mGluR_groupII, Ligand binding domain of the group II metabotropic glutamate receptor
Ligand binding domain of the group II metabotropic glutamate receptor, a family that contains mGlu2R and mGlu3R, all of which inhibit adenylyl cyclase. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes. Length = 458
>gnl|CDD|107371 cd06376, PBP1_mGluR_groupIII, Ligand-binding domain of the group III metabotropic glutamate receptor
Score = 82.2 bits (203), Expect = 2e-19
Identities = 38/103 (36%), Positives = 57/103 (55%), Gaps = 4/103 (3%)
Query: 4 DKCIYDVFPTTNLLLLIPGVIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVS 63
DK I + T N VI+F ++ ++ ++ A +R N G+F WVGSD W A+
Sbjct: 220 DKIIKRLLETPN----ARAVIIFANEDDIRRVLEAAKRANQVGHFLWVGSDSWGAKISPI 275
Query: 64 DGSEAEVEGTLSLQPQANPVRGFDEYFLNLTVENNRRDPWFIE 106
E EG +++ P+ + GFD YF + T+ENNRR+ WF E
Sbjct: 276 LQQEDVAEGAITILPKRASIEGFDAYFTSRTLENNRRNVWFAE 318
Ligand-binding domain of the group III metabotropic glutamate receptor, a family which contains mGlu4R, mGluR6R, mGluR7, and mGluR8; all of which inhibit adenylyl cyclase. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes. Length = 463
>gnl|CDD|107261 cd04509, PBP1_ABC_transporter_GCPR_C_like, Family C of G-protein coupled receptors and their close homologs, the type I periplasmic-binding proteins of ATP-binding cassette transporter-like systems
This CD includes members of the family C of G-protein coupled receptors and their close homologs, the type I periplasmic-binding proteins of ATP-binding cassette transporter-like systems. The family C GPCR includes glutamate/glycine-gated ion channels such as the NMDA receptor, G-protein-coupled receptors, metabotropic glutamate, GABA-B, calcium sensing, phermone receptors, and atrial natriuretic peptide-guanylate cyclase receptors. The glutamate receptors that form cation-selective ion channels, iGluR, can be classified into three different subgroups according to their binding-affinity for the agonists NMDA (N-methyl-D-asparate), AMPA (alpha-amino-3-dihydro-5-methyl-3-oxo-4- isoxazolepropionic acid), and kainate. L-glutamate is a major neurotransmitter in the brain of vertebrates and acts through either mGluRs or iGluRs. mGluRs subunits possess seven transmembrane segments and a large N-terminal extracellular domain. ABC-type leucine-isoleucine-valine-binding protein (LIVBP) is a bacterial periplasmic binding protein that has homology with the amino-terminal domain of the glutamate-receptor ion channels (iGluRs). The extracellular regions of iGluRs are made of two PBP-like domains in tandem, a LIVBP-like domain that constitutes the N terminus - which is included in this CD - followed by a domain related to lysine-arginine-ornithine-binding protein (LAOBP) that belongs to the type II periplasmic binding fold protein superfamily. The uncharacterized periplasmic components of various ABC-type transport systems are included in this group. Length = 299
>gnl|CDD|216296 pfam01094, ANF_receptor, Receptor family ligand binding region
This family includes extracellular ligand binding domains of a wide range of receptors. This family also includes the bacterial amino acid binding proteins of known structure. Length = 343
>gnl|CDD|153138 cd06350, PBP1_GPCR_family_C_like, Ligand-binding domain of membrane-bound glutamate receptors that mediate excitatory transmission on the cellular surface through initial binding of glutamate and are categorized into ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (mGluRs)
Ligand-binding domain of membrane-bound glutamate receptors that mediate excitatory transmission on the cellular surface through initial binding of glutamate and are categorized into ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (mGluRs). The metabotropic glutamate receptors (mGluR) are key receptors in the modulation of excitatory synaptic transmission in the central nervous system. The mGluRs are coupled to G proteins and are thus distinct from the iGluRs which internally contain ligand-gated ion channels. The mGluR structure is divided into three regions: the extracellular region, the seven-spanning transmembrane region and the cytoplasmic region. The extracellular region is further devided into the ligand-binding domain (LBD) and the cysteine-rich domain. The LBD has sequence similarity to the LIVBP, which is a bacterial periplasmic protein (PBP), as well as to the extracellular region of both iGluR and the gamma-aminobutyric acid (GABA)b receptor. iGluRs are divided into three main subtypes based on pharmacological profile: NMDA, AMPA, and kainate receptors. All family C GPCRs have a large extracellular N terminus that contain a domain with homology to bacterial periplasmic amino acid-binding proteins. Length = 348
>gnl|CDD|107248 cd01391, Periplasmic_Binding_Protein_Type_1, Type 1 periplasmic binding fold superfamily
Score = 35.2 bits (81), Expect = 0.004
Identities = 13/62 (20%), Positives = 22/62 (35%), Gaps = 4/62 (6%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATG-NFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQAN 81
I +D+ AG ++A R T + S +G DG A + G ++
Sbjct: 185 AIFACNDEMAAGALKAAREAGLTPGDISIIGFDGSPA---ALLAAGEAGPGLTTVAQPFP 241
Query: 82 PV 83
Sbjct: 242 GD 243
Type 1 periplasmic binding fold superfamily. This model and hierarchy represent the ligand binding domains of the LacI family of transcriptional regulators, periplasmic binding proteins of the ABC-type transport systems, the family C G-protein couples receptors (GPCRs), membrane bound guanylyl cyclases including the family of natriuretic peptide receptors (NPRs), and the N-terminal leucine/isoleucine/valine- binding protein (LIVBP)-like domains of the ionotropic glutamate receptors (iGluRs). In LacI-like transcriptional regulator and the bacterial periplasmic binding proteins the ligands are monosaccharides including lactose, ribose, fructose, xylose, arabinose, galactose/glucose, and other sugars, with a few exceptions. Periplasmic sugar binding proteins are one of the components of ABC transporters and are involved in the active transport of water-soluble ligands. The LacI family of proteins consists of transcriptional regulators related to the lac repressor. In this case, the sugar binding domain binds a sugar which changes the DNA binding activity of the repressor domain. The periplasmic binding proteins are the primary receptors for chemotaxis and transport of many sugar based solutes. The core structures of periplasmic binding proteins are classified into two types, and they differ in number and order of beta strands: type 1 has six beta strands, while type 2 has five beta strands per sub-domain. These two structural folds are thought to be distantly related via a common ancestor. Notably, while the N-terminal LIVBP-like domain of iGluRs belongs to the type 1 periplasmic-binding fold protein superfamily, the glutamate-binding domain of the iGluR is structurally similar to the type 2 periplasmic-binding fold. Length = 269
Ligand binding domain of the group II metabotropic glutamate receptor, a family that contains mGlu2R and mGlu3R, all of which inhibit adenylyl cyclase. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes
>cd06365 PBP1_Pheromone_receptor Ligand-binding domain of the V2R phermone receptor, a member of the family C receptors within the G-protein coupled receptor superfamily
Ligand-binding domain of the V2R phermone receptor, a member of the family C receptors within the G-protein coupled receptor superfamily, which also includes the metabotropic glutamate receptor, the GABAb receptor, the calcium-sensing receptor (CaSR), the T1R taste receptor, and a small group of uncharacterized orphan receptors.
>cd06364 PBP1_CaSR Ligand-binding domain of the CaSR calcium-sensing receptor, which is a member of the family C receptors within the G-protein coupled receptor superfamily
Ligand-binding domain of the CaSR calcium-sensing receptor, which is a member of the family C receptors within the G-protein coupled receptor superfamily. CaSR provides feedback control of extracellular calcium homeostasis by responding sensitively to acute fluctuations in extracellular ionized Ca2+ concentration. This ligand-binding domain has homology to the bacterial leucine-isoleucine-valine binding protein (LIVBP) and a leucine binding protein (LBP). CaSR is widely expressed in mammalian tissues and is active in tissues that are not directly involved in extracellular calcium homeostasis. Moreover, CaSR responds to aromatic, aliphatic, and polar amino acids, but not to positively charged or branched chain amino acids, which suggests that changes in plasma amino acid levels are likely to modulate whole body calci
>cd06376 PBP1_mGluR_groupIII Ligand-binding domain of the group III metabotropic glutamate receptor
Ligand-binding domain of the group III metabotropic glutamate receptor, a family which contains mGlu4R, mGluR6R, mGluR7, and mGluR8; all of which inhibit adenylyl cyclase. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes.
>cd06374 PBP1_mGluR_groupI Ligand binding domain of the group I metabotropic glutamate receptor
Ligand binding domain of the group I metabotropic glutamate receptor, a family containing mGlu1R and mGlu5R, all of which stimulate phospholipase C (PLC) hydrolysis. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes.
>cd06362 PBP1_mGluR Ligand binding domain of the metabotropic glutamate receptors (mGluR)
Ligand binding domain of the metabotropic glutamate receptors (mGluR), which are members of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into cellular responses. mGluRs bind to glutamate and function as an excitatory neurotransmitter; they are involved in learning, memory, anxiety, and the perception of pain. Eight subtypes of mGluRs have been cloned so far, and are classified into three groups according to their sequence similarities, transduction mechanisms, and pharmacological profiles. Group I is composed of mGlu1R and mGlu5R that both stimulate PLC hydrolysis. Group II includes mGlu2R and mGlu3R, which inhibit adenylyl cyclase, as do mGlu4R, mGlu6R, mGlu7R, and mGlu8R, which form group III.
>cd06361 PBP1_GPC6A_like Ligand-binding domain of the promiscuous L-alpha-amino acid receptor GPRC6A which is a broad-spectrum amino acid-sensing receptor
This family includes the ligand-binding domain of the promiscuous L-alpha-amino acid receptor GPRC6A which is a broad-spectrum amino acid-sensing receptor, and its fish homolog, the 5.24 chemoreceptor. GPRC6A is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into cellular responses.
>PF01094 ANF_receptor: Receptor family ligand binding region The Prosite family is a sub-family of the Pfam family; InterPro: IPR001828 This describes a ligand binding domain and includes extracellular ligand binding domains of a wide range of receptors, as well as the bacterial amino acid binding proteins of known structure []
Ligand-binding domain of the T1R taste receptor. The T1R is a member of the family C receptors within the G-protein coupled receptor superfamily, which also includes the metabotropic glutamate receptors, GABAb receptors, the calcium-sensing receptor (CaSR), the V2R pheromone receptors, and a small group of uncharacterized orphan receptors.
>cd06350 PBP1_GPCR_family_C_like Ligand-binding domain of membrane-bound glutamate receptors that mediate excitatory transmission on the cellular surface through initial binding of glutamate and are categorized into ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (mGluRs)
Ligand-binding domain of membrane-bound glutamate receptors that mediate excitatory transmission on the cellular surface through initial binding of glutamate and are categorized into ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (mGluRs). The metabotropic glutamate receptors (mGluR) are key receptors in the modulation of excitatory synaptic transmission in the central nervous system. The mGluRs are coupled to G proteins and are thus distinct from the iGluRs which internally contain ligand-gated ion channels. The mGluR structure is divided into three regions: the extracellular region, the seven-spanning transmembrane region and the cytoplasmic region. The extr
>cd06381 PBP1_iGluR_delta_like N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of an orphan family of delta receptors, GluRdelta1 and GluRdelta2
This CD represents the N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of an orphan family of delta receptors, GluRdelta1 and GluRdelta2. While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. Although the delta receptors are a member of the ionotropic glutamate receptor family, they cannot be activated by AMPA, kainate, NMDA, glutamate, or any other ligands. Phylogenetic analysis shows that both GluRdelta1 and GluRalpha2 are more homologous to non-NMDA receptors. G
>cd06379 PBP1_iGluR_NMDA_NR1 N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the NR1, an essential channel-forming subunit of the NMDA receptor
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the NR1, an essential channel-forming subunit of the NMDA receptor. The ionotropic N-methyl-d-asparate (NMDA) subtype of glutamate receptor serves critical functions in neuronal development, functioning, and degeneration in the mammalian central nervous system. The functional NMDA receptor is a heterotetramer ccomposed of two NR1 and two NR2 (A, B, C, and D) or of NR3 (A and B) subunits. The receptor controls a cation channel that is highly permeable to monovalent ions and calcium and exhibits voltage-dependent inhibition by magnesium. Dual agonists, glutamate and glycine, are required for efficient activation of the NMDA receptor. When co-expressed with NR1, the NR3 subunits form receptors that are activated by glycine alone and therefore
>cd06378 PBP1_iGluR_NMDA_NR2 N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the NR2 subunit of NMDA receptor family
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the NR2 subunit of NMDA receptor family. The ionotropic N-methyl-d-asparate (NMDA) subtype of glutamate receptor serves critical functions in neuronal development, functioning, and degeneration in the mammalian central nervous system. The functional NMDA receptor is a heterotetramer composed of two NR1 and two NR2 (A, B, C, and D) or of NR3 (A and B) subunits. The receptor controls a cation channel that is highly permeable to monovalent ions and calcium and exhibits voltage-dependent inhibition by magnesium. Dual agonists, glutamate and glycine, are required for efficient activation of the NMDA receptor. Among NMDA receptor subtypes, the NR2B subunit containing receptors appear particularly important for pain perception; thus NR2B-selective antagonists may be useful in
>cd06367 PBP1_iGluR_NMDA N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the ionotropic N-methyl-d-asparate (NMDA) subtype of glutamate receptors
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the ionotropic N-methyl-d-asparate (NMDA) subtype of glutamate receptors. While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. The function of the NMDA subtype receptor serves critical functions in neuronal development, functioning, and degeneration in the mammalian central nervous system. The functional NMDA receptor is a heterotetramer comprising two NR1 and two NR2 (A, B, C, and D) or NR3 (A and B) subunits
>cd06390 PBP1_iGluR_AMPA_GluR1 N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the GluR1 subunit of the AMPA receptor
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the GluR1 subunit of the AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) receptor. The AMPA receptor is a member of the glutamate-receptor ion channels (iGluRs) which are the major mediators of excitatory synaptic transmission in the central nervous system. AMPA receptors are composed of four types of subunits (GluR1, GluR2, GluR3, and GluR4) which combine to form a tetramer and play an important role in mediating the rapid excitatory synaptic current. Furthermore, this N-terminal domain of the iGluRs has homology with LIVBP, a bacterial periplasmic binding protein, as well as with the structurally related glutamate-binding domain of the G-protein-coupled metabotropic receptors (mGluRs).
>cd06391 PBP1_iGluR_delta_2 N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the delta2 receptor of an orphan glutamate receptor family
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the delta2 receptor of an orphan glutamate receptor family. While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. Although the delta receptors are a member of the ionotropic glutamate receptor family, they cannot be activated by AMPA, kainate, NMDA, glutamate, or any other ligands. Phylogenetic analysis shows that both GluRdelta1 and GluRalpha2 are closer related to non-NMDA receptors. GluRdelta2 was shown to function as a
>cd06366 PBP1_GABAb_receptor Ligand-binding domain of GABAb receptors, which are metabotropic transmembrane receptors for gamma-aminobutyric acid (GABA)
Ligand-binding domain of GABAb receptors, which are metabotropic transmembrane receptors for gamma-aminobutyric acid (GABA). GABA is the major inhibitory neurotransmitter in the mammalian CNS and, like glutamate and other transmitters, acts via both ligand gated ion channels (GABAa receptors) and G-protein coupled receptors (GABAb). GABAa receptors are members of the ionotropic receptor superfamily which includes alpha-adrenergic and glycine receptors. The GABAb receptor is a member of a receptor superfamily which includes the mGlu receptors. The GABAb receptor is coupled to G alpha_i proteins, and activation causes a decrease in calcium, an increase in potassium membrane conductance, and inhibition of cAMP formation. The response is thus inhibitory and leads to hyperpolarization and decreased neurotransmitter release, for example.
>cd06269 PBP1_glutamate_receptors_like Family C G-protein couples receptors (GPCRs), membrane bound guanylyl cyclases such as the family of natriuretic peptide receptors (NPRs), and the N-terminal leucine/isoleucine/valine- binding protein (LIVBP)-like domain of the ionotropic glutamate receptors
This CD represents the ligand-binding domain of the family C G-protein couples receptors (GPCRs), membrane bound guanylyl cyclases such as the family of natriuretic peptide receptors (NPRs), and the N-terminal leucine/isoleucine/valine- binding protein (LIVBP)-like domain of the ionotropic glutamate receptors, all of which are structurally similar and related to the periplasmic-binding fold type I family. The family C GPCRs consist of metabotropic glutamate receptor (mGluR) receptors, a calcium-sensing receptor (CaSR), gamma-aminobutyric receptors (GABAb), the promiscuous L-alpha-amino acid receptor GPR6A, families of taste and pheromone receptors, and orphan receptors. Truncated splicing va
>cd06352 PBP1_NPR_GC_like Ligand-binding domain of membrane guanylyl-cyclase receptors
Ligand-binding domain of membrane guanylyl-cyclase receptors. Membrane guanylyl cyclases (GC) have a single membrane-spanning region and are activated by endogenous and exogenous peptides. This family can be divided into three major subfamilies: the natriuretic peptide receptors (NPRs), sensory organ-specific membrane GCs, and the enterotoxin/guanylin receptors. The binding of peptide ligands to the receptor results in the activation of the cytosolic catalytic domain. Three types of NPRs have been cloned from mammalian tissues: NPR-A/GC-A, NPR-B/ GC-B, and NPR-C. In addition, two of the GCs, GC-D and GC-G, appear to be pseudogenes in humans. Atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) are produced in the heart, and both bind to the NPR-A. NPR-C, also termed the clearance receptor, binds each of the natriuretic peptides and can alter circulating levels of these peptides. The l
>cd06384 PBP1_NPR_B Ligand-binding domain of type B natriuretic peptide receptor
Ligand-binding domain of type B natriuretic peptide receptor (NPR-B). NPR-B is one of three known single membrane-spanning natriuretic peptide receptors that have been identified. Natriuretic peptides are family of structurally related but genetically distinct hormones/paracrine factors that regulate blood volume, blood pressure, ventricular hypertrophy, pulmonary hypertension, fat metabolism, and long bone growth. In mammals there are three natriuretic peptides: ANP, BNP, and CNP. Like NPR-A (or GC-A), NPR-B (or GC-B) is a transmembrane guanylyl cyclase, an enzyme that catalyzes the synthesis of cGMP. NPR-B is the predominant natriuretic peptide receptor in the brain. The rank of order activation of NPR-B by natriuretic peptides is CNPANPBNP. Homozygous inactivating mutations in human NPR-B cause a form of short-limbed dwarfism known as acromesomelic dysplasia type Maroteaux.
>cd06373 PBP1_NPR_like Ligand binding domain of natriuretic peptide receptor (NPR) family
Ligand binding domain of natriuretic peptide receptor (NPR) family which consists of three different subtypes: type A natriuretic peptide receptor (NPR-A, or GC-A), type B natriuretic peptide receptors (NPR-B, or GC-B), and type C natriuretic peptide receptor (NPR-C). There are three types of natriuretic peptide (NP) ligands specific to the receptors: atrial NP (ANP), brain or B-type NP (BNP), and C-type NP (CNP). The NP family is thought to have arisen through gene duplication during evolution and plays an essential role in cardiovascular and body fluid homeostasis. ANP and BNP bind mainly to NPR-A, while CNP binds specifically to NPR-B. Both NPR-A and NPR-B have guanylyl cyclase catalytic activity and produces intracellular secondary messenger cGMP in response to peptide-ligand binding. Consequently, the NPR-A activation results in vasodilation and inhibition of vascular smooth muscle cell proli
>cd06382 PBP1_iGluR_Kainate N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the kainate receptors
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the kainate receptors, non-NMDA ionotropic receptors which respond to the neurotransmitter glutamate. While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. Kainate receptors have five subunits, GluR5, GluR6, GluR7, KA1, and KA2, which are structurally similar to AMPA and NMDA subunits of ionotropic glutamate receptors. KA1 and KA2 subunits can only form functional receptors with one of the GluR5-7 subunits. Moreover, GluR5-7 can also form functional homomeri
>cd06371 PBP1_sensory_GC_DEF_like Ligand-binding domain of membrane guanylyl cyclases (GC-D, GC-E, and GC-F) that are specifically expressed in sensory tissues
This group includes the ligand-binding domain of membrane guanylyl cyclases (GC-D, GC-E, and GC-F) that are specifically expressed in sensory tissues. They share a similar topology with an N-terminal extracellular ligand-binding domain, a single transmembrane domain, and a C-terminal cytosolic region that contains kinase-like and catalytic domains. GC-D is specifically expressed in a subpopulation of olfactory sensory neurons. GC-E and GC-F are colocalized within the same photoreceptor cells of the retina and have important roles in phototransduction. Unlike the other family members, GC-E and GC-F have no known extracellular ligands. Instead, they are activated under low calcium conditions by guanylyl cyclase activating proteins called GCAPs. GC-D expressing neurons have been implicated in pheromone detection and GC-D is phyloge
>cd06385 PBP1_NPR_A Ligand-binding domain of type A natriuretic peptide receptor
Ligand-binding domain of type A natriuretic peptide receptor (NPR-A). NPR-A is one of three known single membrane-spanning natriuretic peptide receptors that regulate blood volume, blood pressure, ventricular hypertrophy, pulmonary hypertension, fat metabolism, and long bone growth. In mammals there are three natriuretic peptides: ANP, BNP, and CNP. NPR-A is highly expressed in kidney, adrenal, terminal ileum, adipose, aortic, and lung tissues. The rank order of NPR-A activation by natriuretic peptides is ANPBNPCNP. Single allele-inactivating mutations in the promoter of human NPR-A are associated with hypertension and heart failure.
>cd06372 PBP1_GC_G_like Ligand-binding domain of membrane guanylyl cyclase G
This group includes the ligand-binding domain of membrane guanylyl cyclase G (GC-G) which is a sperm surface receptor and might function, similar to its sea urchin counterpart, in the early signaling event that regulates the Ca2+ influx/efflux and subsequent motility response in sperm. GC-G appears to be a pseudogene in human. Furthermore, in contrast to the other orphan receptor GCs, GC-G has a broad tissue distribution in rat, including lung, intestine, kidney, and skeletal muscle.
>cd06369 PBP1_GC_C_enterotoxin_receptor Ligand-binding domain of the membrane guanylyl cyclase C
Ligand-binding domain of the membrane guanylyl cyclase C (GC-C or StaR). StaR is a key receptor for the STa (Escherichia coli Heat Stable enterotoxin), a potent stimulant of intestinal chloride and bicarbonate secretion that cause acute secretory diarrhea. The catalytic domain of the STa/guanylin receptor type membrane GC is highly similar to those of the natriuretic peptide receptor (NPR) type and sensory organ-specific type membrane GCs (GC-D, GC-E and GC-F). The GC-C receptor is mainly expressed in the intestine of most vertebrates, but is also found in the kidney and other organs. Moreover, GC-C is activated by guanylin and uroguanylin, endogenous peptide ligands synthesized in the intestine and kidney. Consequently, the receptor activation results in increased cGMP levels and phosphorylation of the CFTR chloride channel and secretion.
>cd06387 PBP1_iGluR_AMPA_GluR3 N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the GluR3 subunit of the AMPA receptor
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the GluR3 subunit of the AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) receptor. The AMPA receptor is a member of the glutamate-receptor ion channels (iGluRs) which are the major mediators of excitatory synaptic transmission in the central nervous system. AMPA receptors are composed of four types of subunits (GluR1, GluR2, GluR3, and GluR4) which combine to form a tetramer and play an important role in mediating the rapid excitatory synaptic current. Furthermore, this N-terminal domain of the iGluRs has homology with LIVBP, a bacterial periplasmic binding protein, as well as with the structurally related glutamate-binding domain of the G-protein-coupled metabotropic receptors (mGluRs).
>cd06351 PBP1_iGluR_N_LIVBP_like N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the NMDA, AMPA, and kainate receptor subtypes of ionotropic glutamate receptors (iGluRs)
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the NMDA, AMPA, and kainate receptor subtypes of ionotropic glutamate receptors (iGluRs). While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. Glutamate mediates the majority of excitatory synaptic transmission in the central nervous system via two broad classes of ionotropic receptors characterized by their response to glutamate agonists: N-methyl-aspartate (NMDA) and non-NMDA receptors
>cd06383 PBP1_iGluR_AMPA_Like N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of uncharacterized AMPA-like receptors
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of uncharacterized AMPA-like receptors. While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. AMPA receptors consist of four types of subunits (GluR1, GluR2, GluR3, and GluR4) which combine to form a tetramer and play an important roles in mediating the rapid excitatory synaptic current.
>cd06386 PBP1_NPR_C_like Ligand-binding domain of type C natriuretic peptide receptor
Ligand-binding domain of type C natriuretic peptide receptor (NPR-C). NPR-C is found in atrial, mesentery, placenta, lung, kidney, venous tissue, aortic smooth muscle, and aortic endothelial cells. The affinity of NPR-C for natriuretic peptides is ANPCNPBNP. The extracellular domain of NPR-C is about 30% identical to NPR-A and NPR-B. However, unlike the cyclase-linked receptors, it contains only 37 intracellular amino acids and no guanylyl cyclase activity. Major function of NPR-C is to clear natriuretic peptides from the circulation or extracellular surroundings through constitutive receptor-mediated internalization and degradation.
>cd04509 PBP1_ABC_transporter_GCPR_C_like Family C of G-protein coupled receptors and their close homologs, the type I periplasmic-binding proteins of ATP-binding cassette transporter-like systems
This CD includes members of the family C of G-protein coupled receptors and their close homologs, the type I periplasmic-binding proteins of ATP-binding cassette transporter-like systems. The family C GPCR includes glutamate/glycine-gated ion channels such as the NMDA receptor, G-protein-coupled receptors, metabotropic glutamate, GABA-B, calcium sensing, phermone receptors, and atrial natriuretic peptide-guanylate cyclase receptors. The glutamate receptors that form cation-selective ion channels, iGluR, can be classified into three different subgroups according to their binding-affinity for the agonists NMDA (N-methyl-D-asparate), AMPA (alpha-amino-3-dihydro-5-methyl-3-oxo-4-isoxazolepropionic acid), and kainate. L-glutamate is a major neurotransmitter in the brain of vertebrates and acts th
>cd06368 PBP1_iGluR_non_NMDA_like N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the non-NMDA (N-methyl-d-asparate) subtypes of ionotropic glutamate receptors
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the non-NMDA (N-methyl-d-asparate) subtypes of ionotropic glutamate receptors. While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. Glutamate mediates the majority of excitatory synaptic transmission in the central nervous system via two broad classes of ionotropic receptors, characterized by their response to glutamate agonists: N-methyl-d -aspartate (NMDA) and non-NMDA receptors. NMDA receptors
>cd06370 PBP1_Speract_GC_like Ligand-binding domain of membrane bound guanylyl cyclases
Ligand-binding domain of membrane bound guanylyl cyclases (GCs), which are known to be activated by sperm-activating peptides (SAPs), such as speract or resact. These ligand peptides are released by a range of invertebrates to stimulate the metabolism and motility of spermatozoa and are also potent chemoattractants. These GCs contain a single transmembrane segment, an extracellular ligand binding domain, and intracellular protein kinase-like and cyclase catalytic domains. GCs of insect and nematodes, which exhibit high sequence similarity to the speract receptor are also included in this model.
>cd06380 PBP1_iGluR_AMPA N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the AMPA receptor
N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of the AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) receptor, a member of the glutamate-receptor ion channels (iGluRs). AMPA receptors are the major mediators of excitatory synaptic transmission in the central nervous system. While this N-terminal domain belongs to the periplasmic-binding fold type I superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type II. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. AMPA receptors consist of four types of subunits (GluR1, GluR2, GluR3, and GluR4) which combine to form a tetramer and play an important roles in mediating the rapid excita
Score = 73.2 bits (178), Expect = 3e-14, Method: Compositional matrix adjust.
Identities = 35/88 (39%), Positives = 53/88 (60%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V F V G++ A+RR+ G F +GSDGW+ R V+DG + E G ++++ Q+
Sbjct: 261 VACFCEGMTVRGLLMAMRRLGLAGEFLLLGSDGWADRYDVTDGYQREAVGGITIKLQSPD 320
Query: 83 VRGFDEYFLNLTVENNRRDPWFIEAKQN 110
V+ FD+Y+L L E N R+PWF E Q+
Sbjct: 321 VKWFDDYYLKLRPETNHRNPWFQEFWQH 348
>pdb|2E4U|A Chain A, Crystal Structure Of The Extracellular Region Of The Group Ii Metabotropic Glutamate Receptor Complexed With L-glutamate Length = 555
Score = 87.2 bits (216), Expect = 1e-21
Identities = 36/84 (42%), Positives = 53/84 (63%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 260 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 319
Query: 83 VRGFDEYFLNLTVENNRRDPWFIE 106
VR FD+YFL L ++ N R+PWF E
Sbjct: 320 VRSFDDYFLKLRLDTNTRNPWFPE 343
class: Alpha and beta proteins (a/b)
fold: Periplasmic binding protein-like I
superfamily: Periplasmic binding protein-like I
family: L-arabinose binding protein-like
domain: Metabotropic glutamate receptor subtype 1
species: Rat (Rattus norvegicus) [TaxId: 10116]
Score = 63.8 bits (154), Expect = 1e-13
Identities = 36/84 (42%), Positives = 53/84 (63%)
Query: 23 VIVFGSDQEVAGMMRAVRRMNATGNFSWVGSDGWSARGLVSDGSEAEVEGTLSLQPQANP 82
V+ F V G++ A+RR+ G FS +GSDGW+ R V +G E E G ++++ Q+
Sbjct: 252 VVCFCEGMTVRGLLSAMRRLGVVGEFSLIGSDGWADRDEVIEGYEVEANGGITIKLQSPE 311
Query: 83 VRGFDEYFLNLTVENNRRDPWFIE 106
VR FD+YFL L ++ N R+PWF E
Sbjct: 312 VRSFDDYFLKLRLDTNTRNPWFPE 335
