Plant non-specific lipid-transfer proteins transfer phospholipids as well as galactolipids across membranes. May play a role in wax or cutin deposition in the cell walls of expanding epidermal cells and certain secretory tissues.
Prunus armeniaca (taxid: 36596)
>sp|P82900|NLT2G_WHEAT Non-specific lipid-transfer protein 2G OS=Triticum aestivum PE=1 SV=2
Score = 70.5 bits (171), Expect = 3e-12, Method: Compositional matrix adjust.
Identities = 30/89 (33%), Positives = 50/89 (56%)
Query: 12 RFVMVVLVAVAALSQVHVAEAVTCSPTELSPCLAALTSSAPPSGACCNKLRQQRPCLCGY 71
+ V +++A+ L+ C ++L+ C +A+ S A PSG CC LR Q+ C C Y
Sbjct: 8 QVVTALMLALVVLAAAPGGARAACQASQLAVCASAILSGAKPSGECCGNLRAQQGCFCQY 67
Query: 72 LRNPNLRQYVNSPNAKRIVATCGIPYPRC 100
++P QY+ SP+A+ + +CG+ P C
Sbjct: 68 AKDPTYGQYIRSPHARDTLTSCGLAVPHC 96
Transfer lipids across membranes. May play a role in plant defense or in the biosynthesis of cuticle layers.
Triticum aestivum (taxid: 4565)
>sp|P20145|NLTP2_HORVU Probable non-specific lipid-transfer protein OS=Hordeum vulgare GN=LTP2 PE=2 SV=1
>gnl|CDD|238925 cd01959, nsLTP2, nsLTP2: Non-specific lipid-transfer protein type 2 (nsLTP2) subfamily; Plant nsLTPs are small, soluble proteins that facilitate the transfer of fatty acids, phospholipids, glycolipids, and steroids between membranes
In addition to lipid transport and assembly, nsLTPs also play a key role in the defense of plants against pathogens. There are two closely-related types of nsLTPs, types 1 and 2, which differ in protein sequence, molecular weight, and biological properties. nsLTPs contain an internal hydrophobic cavity, which serves as the binding site for lipids. nsLTP2 can bind lipids and sterols. Structure studies of rice nsLTPs show that the plasticity of the hydrophobic cavity is an important factor in ligand binding. The flexibility of the sLTP2 cavity allows its binding to rigid sterol molecules, whereas nsLTP1 cannot bind sterols despite its larger cavity size. The resulting nsLTP2/sterol complexes may bind to receptors that trigger defense responses. nsLTP2 gene expression has been observed in barley and rice developing seeds, during Zinnia elegans cell differentiation, and under abiotic stress conditions in barley roots. The nsLTP2 of Brassica rapa has also been identified as a potent allergen. Length = 66
>gnl|CDD|222713 pfam14368, LTP_2, Probable lipid transfer
Score = 42.1 bits (99), Expect = 2e-06
Identities = 30/93 (32%), Positives = 43/93 (46%), Gaps = 8/93 (8%)
Query: 14 VMVVLVAVAALSQVHVAEAVTCSPTELSPCL--AALTSSAPPSGACCNKLRQ----QRPC 67
V+ VL+A AA + A A +C L PCL + +A PS ACC L+ PC
Sbjct: 1 VLAVLLASAAAAPPAPASAASC-ADSLLPCLGYCYVNGTAAPSPACCAALKAAVKADVPC 59
Query: 68 LCGYLRNPNLRQY-VNSPNAKRIVATCGIPYPR 99
LC + +P + +N A + CG+ P
Sbjct: 60 LCDLVTSPLAAGFGINLTRAVALPKACGLTSPP 92
The members of this family are probably involved in lipid transfer. The family has several highly conserved cysteines, paired in various ways. Length = 95
>gnl|CDD|215810 pfam00234, Tryp_alpha_amyl, Protease inhibitor/seed storage/LTP family
Score = 39.5 bits (92), Expect = 1e-05
Identities = 21/63 (33%), Positives = 29/63 (46%), Gaps = 3/63 (4%)
Query: 40 LSPCLAALTSSA-PPSGACCNKLRQ-QRPCLCGYLRNPNLRQ-YVNSPNAKRIVATCGIP 96
L+PC L PS CC++LRQ Q C C +R L +N A + + CG+
Sbjct: 8 LAPCAGYLQGGCQVPSQQCCSQLRQLQAQCRCTAIRAIVLGIEGINPQAAASLPSMCGVN 67
Query: 97 YPR 99
P
Sbjct: 68 VPY 70
This family is composed of trypsin-alpha amylase inhibitors, seed storage proteins and lipid transfer proteins from plants. Length = 74
>gnl|CDD|237980 cd00010, AAI_LTSS, AAI_LTSS: Alpha-Amylase Inhibitors (AAI), Lipid Transfer (LT) and Seed Storage (SS) Protein family; a protein family unique to higher plants that includes cereal-type alpha-amylase inhibitors, lipid transfer proteins, seed storage proteins, and similar proteins
Score = 37.4 bits (87), Expect = 7e-05
Identities = 20/63 (31%), Positives = 28/63 (44%), Gaps = 7/63 (11%)
Query: 40 LSPCLAALT-SSAPPSGACCNKLRQ----QRPCLCGYLRNPNLRQY--VNSPNAKRIVAT 92
L+PCL+ LT + P CC+ L+ CLC L P N+ A + A
Sbjct: 1 LAPCLSYLTGGATAPPSDCCSGLKSVVKSDPKCLCAALNGPGASLLGLKNATRALALPAA 60
Query: 93 CGI 95
CG+
Sbjct: 61 CGL 63
Proteins in this family are known to play important roles, in defending plants from insects and pathogens, lipid transport between intracellular membranes, and nutrient storage. Many proteins of this family have been identified as allergens in humans. These proteins contain a common pattern of eight cysteines that form four disulfide bridges. Length = 63
AAI_SS AAI_SS: Alpha-Amylase Inhibitors (AAIs) and
85.86
>cd01959 nsLTP2 nsLTP2: Non-specific lipid-transfer protein type 2 (nsLTP2) subfamily; Plant nsLTPs are small, soluble proteins that facilitate the transfer of fatty acids, phospholipids, glycolipids, and steroids between membranes
In addition to lipid transport and assembly, nsLTPs also play a key role in the defense of plants against pathogens. There are two closely-related types of nsLTPs, types 1 and 2, which differ in protein sequence, molecular weight, and biological properties. nsLTPs contain an internal hydrophobic cavity, which serves as the binding site for lipids. nsLTP2 can bind lipids and sterols. Structure studies of rice nsLTPs show that the plasticity of the hydrophobic cavity is an important factor in ligand binding. The flexibility of the sLTP2 cavity allows its binding to rigid sterol molecules, whereas nsLTP1 cannot bind sterols despite its larger cavity size. The resulting nsLTP2/sterol complexes may bind to receptors that trigger defense responses. nsLTP2 gene exp
>cd04660 nsLTP_like nsLTP_like: Non-specific lipid-transfer protein (nsLTP)-like subfamily; composed of predominantly uncharacterized proteins with similarity to nsLTPs, including Medicago truncatula MtN5, the root-specific Phaseolus vulgaris PVR3, Antirrhinum majus FIL1, and Lilium longiflorum LIM3
Plant nsLTPs are small, soluble proteins that facilitate the transfer of fatty acids, phospholipids, glycolipids, and steroids between membranes. The MtN5 gene is induced during root nodule development. FIL1 is thought to be important in petal and stamen formation. The LIM3 gene is induced during the early prophase stage of meiosis in lily microsporocytes.
>cd01960 nsLTP1 nsLTP1: Non-specific lipid-transfer protein type 1 (nsLTP1) subfamily; Plant nsLTPs are small, soluble proteins that facilitate the transfer of fatty acids, phospholipids, glycolipids, and steroids between membranes
In addition to lipid transport and assembly, nsLTPs also play a key role in the defense of plants against pathogens. There are two closely-related types of nsLTPs, types 1 and 2, which differ in protein sequence, molecular weight, and biological properties. nsLTPs contain an internal hydrophobic cavity, which serves as the binding site for lipids. The hydrophobic cavity accommodates various fatty acid ligands containing from ten to 18 carbon atoms. In general, the cavity is larger in nsLTP1 than in nsLTP2. nsLTP1 proteins are located in extracellular layers and in vacuolar structures. They may be involved in the formation of cutin layers on plant surfaces by transporting cutin monomers. Many nsLTP1 proteins have been characterized as allergens in humans.
>cd00010 AAI_LTSS AAI_LTSS: Alpha-Amylase Inhibitors (AAI), Lipid Transfer (LT) and Seed Storage (SS) Protein family; a protein family unique to higher plants that includes cereal-type alpha-amylase inhibitors, lipid transfer proteins, seed storage proteins, and similar proteins
Proteins in this family are known to play important roles, in defending plants from insects and pathogens, lipid transport between intracellular membranes, and nutrient storage. Many proteins of this family have been identified as allergens in humans. These proteins contain a common pattern of eight cysteines that form four disulfide bridges.
>smart00499 AAI Plant lipid transfer protein / seed storage protein / trypsin-alpha amylase inhibitor domain family
>PF00234 Tryp_alpha_amyl: Protease inhibitor/seed storage/LTP family This is a small subfamily; InterPro: IPR003612 This domain is found is several proteins, including plant lipid transfer proteins [], seed storage proteins [] and trypsin-alpha amylase inhibitors [, ]
The domain forms a four-helical bundle in a right-handed superhelix with a folded leaf topology, which is stabilised by disulphide bonds, and which has an internal cavity. More information about this protein can be found at Protein of the Month: alpha-Amylase [].; PDB: 1BFA_A 1BEA_A 1MID_A 1BE2_A 1LIP_A 3GSH_A 1JTB_A 1UVC_B 1BV2_A 1UVB_A ....
>cd01958 HPS_like HPS_like: Hydrophobic Protein from Soybean (HPS)-like subfamily; composed of proteins with similarity to HPS, a small hydrophobic protein with unknown function related to cereal-type alpha-amylase inhibitors and lipid transfer proteins
In addition to HPS, members of this subfamily include a hybrid proline-rich protein (HyPRP) from maize, a dark-inducible protein (LeDI-2) from Lithospermum erythrorhizon, maize ZRP3 protein, and rice RcC3 protein. HyPRP is an embryo-specific protein that contains an N-terminal proline-rich domain and a C-terminal HPS-like cysteine-rich domain. It has been suggested that HyPRP may be involved in the stability and defense of the developing embryo. LeDI-2 is a root-specific protein that may be involved in regulating the biosynthesis of shikonin derivatives in L. erythrorhizon. Maize ZRP3 and rice RcC3 are root-specific proteins whose functions are yet to be determined. It has been reported that ZRP3 largely accumulates in a distinct subset
>cd00261 AAI_SS AAI_SS: Alpha-Amylase Inhibitors (AAIs) and Seed Storage (SS) Protein subfamily; composed of cereal-type AAIs and SS proteins
They are mainly present in the seeds of a variety of plants. AAIs play an important role in the natural defenses of plants against insects and pathogens such as fungi, bacteria and viruses. AAIs impede the digestion of plant starch and proteins by inhibiting digestive alpha-amylases and proteinases. Also included in this subfamily are SS proteins such as 2S albumin, gamma-gliadin, napin, and prolamin. These AAIs and SS proteins are also known allergens in humans.
Score = 94.5 bits (235), Expect = 1e-27
Identities = 27/66 (40%), Positives = 41/66 (62%)
Query: 35 CSPTELSPCLAALTSSAPPSGACCNKLRQQRPCLCGYLRNPNLRQYVNSPNAKRIVATCG 94
C ++L+ C +A+ S A PSG CC LR Q+ C C Y ++P QY+ SP+A+ + +CG
Sbjct: 2 CQASQLAVCASAILSGAKPSGECCGNLRAQQGCFCQYAKDPTYGQYIRSPHARDTLTSCG 61
Query: 95 IPYPRC 100
+ P C
Sbjct: 62 LAVPHC 67
class: All alpha proteins
fold: Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
superfamily: Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
family: Plant lipid-transfer and hydrophobic proteins
domain: Non-specific lipid-transfer protein homologue (ns-LTP2)
species: Triticum turgidum [TaxId: 4571]
Score = 98.3 bits (245), Expect = 2e-29
Identities = 27/66 (40%), Positives = 41/66 (62%)
Query: 35 CSPTELSPCLAALTSSAPPSGACCNKLRQQRPCLCGYLRNPNLRQYVNSPNAKRIVATCG 94
C ++L+ C +A+ S A PSG CC LR Q+ C C Y ++P QY+ SP+A+ + +CG
Sbjct: 2 CQASQLAVCASAILSGAKPSGECCGNLRAQQGCFCQYAKDPTYGQYIRSPHARDTLTSCG 61
Query: 95 IPYPRC 100
+ P C
Sbjct: 62 LAVPHC 67
