Neuronal cell surface protein that may be involved in cell recognition and cell adhesion. May mediate intracellular signaling. Gallus gallus (taxid: 9031)
Cell surface protein involved in cell-cell-interactions, excytosis of secretory granules and regulation of signal transmission. Function is isoform-specific. Alpha-type isoforms have a long N-terminus with six laminin G-like domains and play an important role in synaptic signal transmission. Alpha-type isoforms play a role in the regulation of calcium channel activity and Ca(2+)-triggered neurotransmitter release at synapses and at neuromuscular junctions. They play an important role in Ca(2+)-triggered exocytosis of secretory granules in pituitary gland. They may effect their functions at synapses and in endocrine cells via their interactions with proteins from the exocytotic machinery. Likewise, alpha-type isoforms play a role in regulating the activity of postsynaptic NMDA receptors, a subtype of glutamate-gated ion channels (By similarity). Both alpha-type and beta-type isoforms may play a role in the formation or maintenance of synaptic junctions via their interactions (via the extracellular domains) with neuroligin family members, CBLN1 or CBLN2. In vitro, triggers the de novo formation of presynaptic structures. May be involved in specification of excitatory synapses. Alpha-type isoforms were first identified as receptors for alpha-latroxin from spider venom.
Cell surface protein involved in cell-cell-interactions, excytosis of secretory granules and regulation of signal transmission. Function is isoform-specific. Alpha-type isoforms have a long N-terminus with six laminin G-like domains and play an important role in synaptic signal transmission. Alpha-type isoforms play a role in the regulation of calcium channel activity and Ca(2+)-triggered neurotransmitter release at synapses and at neuromuscular junctions. They play an important role in Ca(2+)-triggered exocytosis of secretory granules in pituitary gland. They may effect their functions at synapses and in endocrine cells via their interactions with proteins from the exocytotic machinery. Likewise, alpha-type isoforms play a role in regulating the activity of postsynaptic NMDA receptors, a subtype of glutamate-gated ion channels (By similarity). Both alpha-type and beta-type isoforms may play a role in the formation or maintenance of synaptic junctions via their interactions (via the extracellular domains) with neuroligin family members, CBLN1 or CBLN2. In vitro, triggers the de novo formation of presynaptic structures. May be involved in specification of excitatory synapses. Alpha-type isoforms were first identified as receptors for alpha-latroxin from spider venom.
>cd00110 LamG Laminin G domain; Laminin G-like domains are usually Ca++ mediated receptors that can have binding sites for steroids, beta1 integrins, heparin, sulfatides, fibulin-1, and alpha-dystroglycans
Proteins that contain LamG domains serve a variety of purposes including signal transduction via cell-surface steroid receptors, adhesion, migration and differentiation through mediation of cell adhesion molecules.
The laminin globular (G) domain can be found in one to several copies in various laminin family members, which includes a large number of extracellular proteins. The C terminus of laminin alpha chain contains a tandem repeat of five laminin G domains, which are critical for heparin-binding and cell attachment activity []. Laminin alpha4 is distributed in a variety of tissues including peripheral nerves, dorsal root ganglion, skeletal muscle and capillaries; in the neuromuscular junction, it is required for synaptic specialisation []. The structure of the laminin-G domain has been predicted to resemble that of pentraxin []. Laminin G domains can vary in their function, and a variety of binding functions has been ascribed to different LamG modules. For example, the laminin alpha1 and alpha2 chains each has five C-teminal laminin G domains, where only domains LG4 and LG5 contain binding sites for heparin, sulphatides and the cell surface receptor dystroglycan []. Laminin G-containing proteins appear to have a wide variety of roles in cell adhesion, signalling, migration, assembly and differentiation. This entry represents one subtype of laminin G domains, which is sometimes found in association with thrombospondin-type laminin G domains (IPR012680 from INTERPRO).; PDB: 1OKQ_A 1DYK_A 2C5D_A 1H30_A 1LHW_A 1KDK_A 1LHU_A 1KDM_A 1LHO_A 1D2S_A ....
>PF02210 Laminin_G_2: Laminin G domain; InterPro: IPR012680 Laminins are large heterotrimeric glycoproteins involved in basement membrane function []
The laminin globular (G) domain can be found in one to several copies in various laminin family members, including a large number of extracellular proteins. The C terminus of the laminin alpha chain contains a tandem repeat of five laminin G domains, which are critical for heparin-binding and cell attachment activity []. Laminin alpha4 is distributed in a variety of tissues including peripheral nerves, dorsal root ganglion, skeletal muscle and capillaries; in the neuromuscular junction, it is required for synaptic specialisation []. The structure of the laminin-G domain has been predicted to resemble that of pentraxin []. Laminin G domains can vary in their function, and a variety of binding functions have been ascribed to different LamG modules. For example, the laminin alpha1 and alpha2 chains each have five C-teminal laminin G domains, where only domains LG4 and LG5 contain binding sites for heparin, sulphatides and the cell surface receptor dystroglycan []. Laminin G-containing proteins appear to have a wide variety of roles in cell adhesion, signalling, migration, assembly and differentiation. This entry represents one subtype of laminin G domains, which is sometimes found in association with thrombospondin-type laminin G domains (IPR012679 from INTERPRO).; PDB: 3POY_A 3QCW_B 3R05_B 3ASI_A 3MW4_B 3MW3_A 1QU0_D 1DYK_A 1OKQ_A 3SH4_A ....