SNARE motif of Vti1; Vti1 (vesicle transport through interaction with t-SNAREs homolog 1) 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 complex that mediates transport from the early endosomes and the MVBs (multivesicular bodies), and from the MVBs to the lysosomes, respectively. 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
                ....*....|....*....|....*....|....*....|....*....|....*....
gi 6323853  127 LQKSGDRLKDASRIANETEGIGSQIMMDLRSQRETLENARQTLFQADSYVDKSIKTLKT 185
Cdd:cd15862   4 LDRSSDRLEDSRRIAAETEEVGANILEDLGRQRETLLRARDRLRETDGNLDRSRRILKS 62

SNARE motif of Vti1; Vti1 (vesicle transport through interaction with t-SNAREs homolog 1) 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 complex that mediates transport from the early endosomes and the MVBs (multivesicular bodies), and from the MVBs to the lysosomes, respectively. 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
                ....*....|....*....|....*....|....*....|....*....|....*....
gi 6323853  127 LQKSGDRLKDASRIANETEGIGSQIMMDLRSQRETLENARQTLFQADSYVDKSIKTLKT 185
Cdd:cd15862   4 LDRSSDRLEDSRRIAAETEEVGANILEDLGRQRETLLRARDRLRETDGNLDRSRRILKS 62

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        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 6323853     12 FKTTLEQAKASLAEAPSQPLSQRNTTLKHVEQQQDELFDLLDQMDVEVNNSigDASERATYKAKLREWKKTIQSdIKRPL 91
Cdd:pfam05008   1 FKELLAEITRKLARLSSLPGEERKAALREIERKLDEAEELLDQMELEVRNL--PSSERSKYKAKLREYKSDLKK-LKKEL 77

                  .
gi 6323853     92 Q 92
Cdd:pfam05008  78 K 78

SNARE motif of Vti1; Vti1 (vesicle transport through interaction with t-SNAREs homolog 1) 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 complex that mediates transport from the early endosomes and the MVBs (multivesicular bodies), and from the MVBs to the lysosomes, respectively. 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
                ....*....|....*....|....*....|....*....|....*....|....*....
gi 6323853  127 LQKSGDRLKDASRIANETEGIGSQIMMDLRSQRETLENARQTLFQADSYVDKSIKTLKT 185
Cdd:cd15862   4 LDRSSDRLEDSRRIAAETEEVGANILEDLGRQRETLLRARDRLRETDGNLDRSRRILKS 62

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        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 6323853     12 FKTTLEQAKASLAEAPSQPLSQRNTTLKHVEQQQDELFDLLDQMDVEVNNSigDASERATYKAKLREWKKTIQSdIKRPL 91
Cdd:pfam05008   1 FKELLAEITRKLARLSSLPGEERKAALREIERKLDEAEELLDQMELEVRNL--PSSERSKYKAKLREYKSDLKK-LKKEL 77

                  .
gi 6323853     92 Q 92
Cdd:pfam05008  78 K 78

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 6323853  125 AILQKSGDRLKDASRIANETEGIGSQIMMDLRSQRETLENARQTLFQADSYVDKSIKTLK 184
Cdd:cd15890   2 ESLNRTSDSLARSQRIAAETEQIGTEIIEELGEQREQLLRTRDRLEETDANLSRARRILR 61

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.

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|
gi 6323853  126 ILQKSGDRLKDASRIANETEGIGSQIMMDLRSQRETLENARQTLFQADSYVDKSIKTLKT 185
Cdd:cd15861   6 TQDETTESIRRALRLAEETKEIGADTLEELHRQGEQLERIHNDVDDIDSNLKRAEKLLKE 65