SNARE motif of Vti1b-like; Vti1b (vesicle transport through interaction with t-SNAREs homolog 1B) belongs to the Qb subgroup of SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptor). Vti1b interacts with syntaxin 7 (Qa), syntaxin 8 (Qc), and the lysosomal R-SNARE VAMP8 or VAMP7 to form the endosomal SNARE core complexes that mediate transport from the early endosomes and the MVBs (multivesicular bodies), and from the MVBs to the lysosomes, respectively. SNARE proteins consist of coiled-coil helices (called SNARE motifs) which mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complex mediates membrane fusion, important for trafficking of newly synthesized proteins, recycling of pre-existing proteins and organelle formation. SNARE proteins are classified into four groups, Qa-, Qb-, Qc- and R-SNAREs, depending on whether the residue in the hydrophilic center layer of the four-helical bundle is a glutamine (Q) or arginine (R). Qa-, as well as Qb- and Qc-SNAREs, are localized to target organelle membranes, while R-SNARE is localized to vesicle membranes. They form unique complexes consisting of one member of each subgroup, that mediate fusion between a specific type of vesicles and their target organelle. Their SNARE motifs form twisted and parallel heterotetrameric helix bundles. Examples for members of the Qb SNAREs are N-terminal domains of SNAP23 and SNAP25, Vti1, Sec20 and GS27.

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                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 1958781426  75 TESLNRATQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRS 136
Cdd:cd15890     1 TESLNRTSDSLARSQRIAAETEQIGTEIIEELGEQREQLLRTRDRLEETDANLSRARRILRS 62

SNARE motif of Vti1b-like; Vti1b (vesicle transport through interaction with t-SNAREs homolog 1B) belongs to the Qb subgroup of SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptor). Vti1b interacts with syntaxin 7 (Qa), syntaxin 8 (Qc), and the lysosomal R-SNARE VAMP8 or VAMP7 to form the endosomal SNARE core complexes that mediate transport from the early endosomes and the MVBs (multivesicular bodies), and from the MVBs to the lysosomes, respectively. SNARE proteins consist of coiled-coil helices (called SNARE motifs) which mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complex mediates membrane fusion, important for trafficking of newly synthesized proteins, recycling of pre-existing proteins and organelle formation. SNARE proteins are classified into four groups, Qa-, Qb-, Qc- and R-SNAREs, depending on whether the residue in the hydrophilic center layer of the four-helical bundle is a glutamine (Q) or arginine (R). Qa-, as well as Qb- and Qc-SNAREs, are localized to target organelle membranes, while R-SNARE is localized to vesicle membranes. They form unique complexes consisting of one member of each subgroup, that mediate fusion between a specific type of vesicles and their target organelle. Their SNARE motifs form twisted and parallel heterotetrameric helix bundles. Examples for members of the Qb SNAREs are N-terminal domains of SNAP23 and SNAP25, Vti1, Sec20 and GS27.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 1958781426  75 TESLNRATQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRS 136
Cdd:cd15890     1 TESLNRTSDSLARSQRIAAETEQIGTEIIEELGEQREQLLRTRDRLEETDANLSRARRILRS 62

Helical region found in SNAREs; All alpha-helical motifs that form twisted and parallel four-helix bundles in target soluble N-ethylmaleimide-sensitive factor (NSF) attachment protein (SNAP) receptor proteins. This motif found in "Q-SNAREs".

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                   ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 1958781426   73 QGTESLNRATQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRSM 137
Cdd:smart00397   2 QALAREEERDEELEQLEKSIQELKQIFLDMGTELEEQGEQLDRIEDNVDDADVNLKKANKRLKKA 66

SNARE motif of Vti1b-like; Vti1b (vesicle transport through interaction with t-SNAREs homolog 1B) belongs to the Qb subgroup of SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptor). Vti1b interacts with syntaxin 7 (Qa), syntaxin 8 (Qc), and the lysosomal R-SNARE VAMP8 or VAMP7 to form the endosomal SNARE core complexes that mediate transport from the early endosomes and the MVBs (multivesicular bodies), and from the MVBs to the lysosomes, respectively. SNARE proteins consist of coiled-coil helices (called SNARE motifs) which mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complex mediates membrane fusion, important for trafficking of newly synthesized proteins, recycling of pre-existing proteins and organelle formation. SNARE proteins are classified into four groups, Qa-, Qb-, Qc- and R-SNAREs, depending on whether the residue in the hydrophilic center layer of the four-helical bundle is a glutamine (Q) or arginine (R). Qa-, as well as Qb- and Qc-SNAREs, are localized to target organelle membranes, while R-SNARE is localized to vesicle membranes. They form unique complexes consisting of one member of each subgroup, that mediate fusion between a specific type of vesicles and their target organelle. Their SNARE motifs form twisted and parallel heterotetrameric helix bundles. Examples for members of the Qb SNAREs are N-terminal domains of SNAP23 and SNAP25, Vti1, Sec20 and GS27.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 1958781426  75 TESLNRATQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRS 136
Cdd:cd15890     1 TESLNRTSDSLARSQRIAAETEQIGTEIIEELGEQREQLLRTRDRLEETDANLSRARRILRS 62

Snare region anchored in the vesicle membrane C-terminus; Within the SNARE proteins interactions in the C-terminal half of the SNARE helix are critical to the driving of membrane fusion; whereas interactions in the N-terminal half of the SNARE domain are important for promoting priming or docking of the vesicle pfam05008.

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                  ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 1958781426  76 ESLNRATQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRSMSRKV 141
Cdd:pfam12352   1 ERLLREHDRLKNSHRIADETISIGQAILEDLHSQRETLKRARNKLHNTDNRLGKSNSTLRLINRRR 66

SNARE motif of Vti1b-like; Vti1a (vesicle transport through interaction with t-SNAREs homolog 1A) belongs to the Qb subgroup of SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptor). Vti1a interacts with syntaxin 16 (Qa), syntaxin 6 (Qc), and the lysosomal R-SNARE VAMP4 to form an endosomal SNARE core complex that mediates transport from the early endosomes to the TGN (trans-Golgi network). SNARE proteins consist of coiled-coil helices (called SNARE motifs) which mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complex mediates membrane fusion, important for trafficking of newly synthesized proteins, recycling of pre-existing proteins and organelle formation. SNARE proteins are classified into four groups, Qa-, Qb-, Qc- and R-SNAREs, depending on whether the residue in the hydrophilic center layer of the four-helical bundle is a glutamine (Q) or arginine (R). Qa-, as well as Qb- and Qc-SNAREs, are localized to target organelle membranes, while R-SNARE is localized to vesicle membranes. They form unique complexes consisting of one member of each subgroup, that mediate fusion between a specific type of vesicles and their target organelle. Their SNARE motifs form twisted and parallel heterotetrameric helix bundles. Examples for members of the Qb SNAREs are N-terminal domains of SNAP23 and SNAP25, Vti1, Sec20 and GS27.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 1958781426  75 TESLNRATQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRS 136
Cdd:cd15891     1 TERLERSSRRLEDGYRIAVETEQIGAQILDDLHSQRETIQRSRDRLRETDSELGKSSRVLSG 62

N-terminal SNARE motif of SNAP25, SNAP23, SNAP29, and SEC9; N-terminal SNARE motif of members of the Qb/Qc subfamily of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins. Qb/Qc SNAREs consist of 2 coiled-coil helices (called SNARE motifs, one belonging to the Qb subgroup and one belonging to the Qc subgroup), which mediate the interactions with other SNARE proteins, and a transmembrane domain. In general, the SNARE complex mediates membrane fusion, important for trafficking of newly synthesized proteins, recycling of pre-existing proteins and organelle formation. SNARE proteins are classified into four groups, Qa-, Qb-, Qc- and R-SNAREs, depending on whether the residue in the hydrophilic center layer of the four-helical bundle is a glutamine (Q) or arginine (R). Qa-, as well as Qb- and Qc-SNAREs, are localized to target organelle membranes, while R-SNARE is localized to vesicle membranes. They form unique complexes consisting of one member of each subgroup, that mediate fusion between a specific type of vesicles and their target organelle. Their SNARE motifs form twisted and parallel heterotetrameric helix bundles. Examples for members of the Qb/Qc SNAREs are SNAP23, SNAP25, SNAP29, SNAP47 and SEC9.

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                  ....*....|....*....|....*....|....*....|....*....|....*
gi 1958781426  82 TQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRS 136
Cdd:cd15861    11 TESIRRALRLAEETKEIGADTLEELHRQGEQLERIHNDVDDIDSNLKRAEKLLKE 65

Vesicle transport v-SNARE protein N-terminus; V-SNARE proteins are required for protein traffic between eukaryotic organelles. The v-SNAREs on transport vesicles interact with t-SNAREs on target membranes in order to facilitate this. This domain is the N-terminal half of the V-Snare proteins.

                          10        20        30
                  ....*....|....*....|....*....|....*
gi 1958781426   1 MEEELRYAPLTFRNSMMSKLRNYRKDLAKLHREVR 35
Cdd:pfam05008  44 MELEVRNLPSSERSKYKAKLREYKSDLKKLKKELK 78

SNARE motif of SEC20; SEC20 (also known as BNIP1, NIP1, or TRG-8) forms a complex with syntaxin 18 (Qa), SEC22 (R-SNARE)and USE1 (Qc), and is involved in the transport from cis-Golgi to the endoplasmic reticulum (ER). SEC20 is a member of the Qb subfamily of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins which contain coiled-coil helices (called SNARE motifs) that mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complex mediates membrane fusion, important for trafficking of newly synthesized proteins, recycling of pre-existing proteins and organelle formation. SNARE proteins are classified into four groups, Qa-, Qb-, Qc- and R-SNAREs, depending on whether the residue in the hydrophilic center layer of the four-helical bundle is a glutamine (Q) or arginine (R). Qa-, as well as Qb- and Qc-SNAREs, are localized to target organelle membranes, while R-SNARE is localized to vesicle membranes. They form unique complexes consisting of one member of each subgroup, that mediate fusion between a specific type of vesicles and their target organelle. Their SNARE motifs form twisted and parallel heterotetrameric helix bundles.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1958781426  82 TQSIERSHRIAAETDQIGSEIIEELGEQRDQLERTKSRLVNTNENLSKSRKILRSMSRKVITNKLLlsviIVLELAILVG 161
Cdd:cd15865     8 TENLLRISRMLASQVQQSELTLQELASSSNTVTETHEEFKNMSGVIQTSAKLLTKYNRRELTDKLL----IFLALLFFLA 83

                  ....
gi 1958781426 162 LVYY 165
Cdd:cd15865    84 TVLY 87