Syntaxin N-terminus domain; syntaxins are nervous system-specific proteins implicated in the docking of synaptic vesicles with the presynaptic plasma membrane; they are a family of receptors for intracellular transport vesicles; each target membrane may be identified by a specific member of the syntaxin family; syntaxins contain a moderately well conserved amino-terminal domain, called Habc, whose structure is an antiparallel three-helix bundle; a linker of about 30 amino acids connects this to the carboxy-terminal region, designated H3 (t_SNARE), of the syntaxin cytoplasmic domain; the highly conserved H3 region forms a single, long alpha-helix when it is part of the core SNARE complex and anchors the protein on the cytoplasmic surface of cellular membranes; H3 is not included in defining this domain

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 568950036  39 DEFFQKVQTIRQTMAKLESKVRELEKQQVTILATPLPEESMKQGLQNLREEIKQLGREVRAQLKAIEPQKEEADENYNSV 118
Cdd:cd00179    2 EEFFEEVEEIRGNIDKISEDVEELQKLHSQLLTAPDADPELKQELESLVQEIKKLAKEIKGKLKELEESNEQNEALNGSS 81

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 568950036 119 NTRMKKTQHGVLSQQFVELINKCNSMQSEYREKNVERIRRQLKITNaGMVSDEELEQMLDSGQSEVFVSNI 189
Cdd:cd00179   82 VDRIRKTQHSGLSKKFVEVMTEFNKAQRKYRERYKERIQRQLEITG-GEATDEELEDMLESGNSEIFTSQI 151

Syntaxin N-terminus domain; syntaxins are nervous system-specific proteins implicated in the docking of synaptic vesicles with the presynaptic plasma membrane; they are a family of receptors for intracellular transport vesicles; each target membrane may be identified by a specific member of the syntaxin family; syntaxins contain a moderately well conserved amino-terminal domain, called Habc, whose structure is an antiparallel three-helix bundle; a linker of about 30 amino acids connects this to the carboxy-terminal region, designated H3 (t_SNARE), of the syntaxin cytoplasmic domain; the highly conserved H3 region forms a single, long alpha-helix when it is part of the core SNARE complex and anchors the protein on the cytoplasmic surface of cellular membranes; H3 is not included in defining this domain

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 568950036  39 DEFFQKVQTIRQTMAKLESKVRELEKQQVTILATPLPEESMKQGLQNLREEIKQLGREVRAQLKAIEPQKEEADENYNSV 118
Cdd:cd00179    2 EEFFEEVEEIRGNIDKISEDVEELQKLHSQLLTAPDADPELKQELESLVQEIKKLAKEIKGKLKELEESNEQNEALNGSS 81

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 568950036 119 NTRMKKTQHGVLSQQFVELINKCNSMQSEYREKNVERIRRQLKITNaGMVSDEELEQMLDSGQSEVFVSNI 189
Cdd:cd00179   82 VDRIRKTQHSGLSKKFVEVMTEFNKAQRKYRERYKERIQRQLEITG-GEATDEELEDMLESGNSEIFTSQI 151

Syntaxin N-terminal domain; Three-helix domain that (in Sso1p) slows the rate of its reaction with the SNAP-25 homologue Sec9p

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 568950036    36 SPDDEFFQKVQTIRQTMAKLESKVRELEKQQVTILATPLPEESMKQGLQNLREEIKQLGREVRAQLKAIEPQKEEADENy 115
Cdd:smart00503   1 SNLDEFFEKVEEIRANIQKISQNVAELQKLHEELLTPPDADKELREKLERLIDDIKRLAKEIRAKLKELEKENLENRAS- 79

                           90       100       110
                   ....*....|....*....|....*....|....*.
gi 568950036   116 NSVNTRMKKTQHGVLSQQFVELINKCNSMQSEYREK 151
Cdd:smart00503  80 GSASDRTRKAQTEKLRKKFKEVMNEFQRLQRKYRER 115

SNARE motif of syntaxin 4; Syntaxin-4 forms a complex with SNAP-23 (Qb/Qc) and R-SNAREs VAMP8, VAMP2 and VAMP7 which plays a role in exocytosis of secetory granule. Syntaxin 4 is member of the Qa subgroup of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, which consist of coiled-coil helices (called SNARE motifs) that mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complexes mediate 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.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*..
gi 568950036 199 ALNEISARHSEIQQLERSIRELHEIFTFLATEVEMQGEMIKGDDQSI 245
Cdd:cd15883    1 ALNEIEARHSEIQKLERSIRELHDMFTYLAMEVEAQGEMIDRIEKNI 47

Syntaxin N-terminus domain; syntaxins are nervous system-specific proteins implicated in the docking of synaptic vesicles with the presynaptic plasma membrane; they are a family of receptors for intracellular transport vesicles; each target membrane may be identified by a specific member of the syntaxin family; syntaxins contain a moderately well conserved amino-terminal domain, called Habc, whose structure is an antiparallel three-helix bundle; a linker of about 30 amino acids connects this to the carboxy-terminal region, designated H3 (t_SNARE), of the syntaxin cytoplasmic domain; the highly conserved H3 region forms a single, long alpha-helix when it is part of the core SNARE complex and anchors the protein on the cytoplasmic surface of cellular membranes; H3 is not included in defining this domain

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 568950036  39 DEFFQKVQTIRQTMAKLESKVRELEKQQVTILATPLPEESMKQGLQNLREEIKQLGREVRAQLKAIEPQKEEADENYNSV 118
Cdd:cd00179    2 EEFFEEVEEIRGNIDKISEDVEELQKLHSQLLTAPDADPELKQELESLVQEIKKLAKEIKGKLKELEESNEQNEALNGSS 81

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 568950036 119 NTRMKKTQHGVLSQQFVELINKCNSMQSEYREKNVERIRRQLKITNaGMVSDEELEQMLDSGQSEVFVSNI 189
Cdd:cd00179   82 VDRIRKTQHSGLSKKFVEVMTEFNKAQRKYRERYKERIQRQLEITG-GEATDEELEDMLESGNSEIFTSQI 151

Syntaxin N-terminal domain; Three-helix domain that (in Sso1p) slows the rate of its reaction with the SNAP-25 homologue Sec9p

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 568950036    36 SPDDEFFQKVQTIRQTMAKLESKVRELEKQQVTILATPLPEESMKQGLQNLREEIKQLGREVRAQLKAIEPQKEEADENy 115
Cdd:smart00503   1 SNLDEFFEKVEEIRANIQKISQNVAELQKLHEELLTPPDADKELREKLERLIDDIKRLAKEIRAKLKELEKENLENRAS- 79

                           90       100       110
                   ....*....|....*....|....*....|....*.
gi 568950036   116 NSVNTRMKKTQHGVLSQQFVELINKCNSMQSEYREK 151
Cdd:smart00503  80 GSASDRTRKAQTEKLRKKFKEVMNEFQRLQRKYRER 115

SNARE motif of syntaxin 4; Syntaxin-4 forms a complex with SNAP-23 (Qb/Qc) and R-SNAREs VAMP8, VAMP2 and VAMP7 which plays a role in exocytosis of secetory granule. Syntaxin 4 is member of the Qa subgroup of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, which consist of coiled-coil helices (called SNARE motifs) that mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complexes mediate 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.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*..
gi 568950036 199 ALNEISARHSEIQQLERSIRELHEIFTFLATEVEMQGEMIKGDDQSI 245
Cdd:cd15883    1 ALNEIEARHSEIQKLERSIRELHDMFTYLAMEVEAQGEMIDRIEKNI 47

SNARE motif of syntaxin 2; Syntaxin 2 (STX2), also known as epimorphin (EPM or EPIM), may interact with SNAP-23 (Qb/c) and genetic varioations are associated with type 1 von Willebrand disease (VWD). Syntaxin 2 is a member of the Qa subgroup of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, which consist of coiled-coil helices (called SNARE motifs) that mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complexes mediate 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.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*..
gi 568950036 199 ALNEISARHSEIQQLERSIRELHEIFTFLATEVEMQGEMIKGDDQSI 245
Cdd:cd15882    1 ALNEIESRHKDIMKLESSIRELHDMFVDMAMLVETQGEMINNIEKNV 47

SNARE motif of syntaxin 3; Syntaxin 3 (STX3) has been shown to form a complex with VAMP8 (R-SNARE) and SNAP-23 (Qb/c) in mast cells. Mutations have been implicated in human microvillus inclusion disease (MVID), a disorder of the differentiation of intestinal epithelium. Syntaxin 3 is a member of the Qa subgroup of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, which consist of coiled-coil helices (called SNARE motifs) that mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complexes mediate 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.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|
gi 568950036 199 ALNEISARHSEIQQLERSIRELHEIFTFLATEVEMQGEMI 238
Cdd:cd15881    1 ALSEIEGRHKDIVRLESSIKELHDMFVDIAMLVENQGEML 40

SNARE motif of Sso1; Saccharomyces cerevisiae SNARE protein Sso1p forms a complex with synaptobrevin homolog Snc1p (R-SNARE) and the SNAP-25 homolog Sec9p (Qb/c) which is involved in exocytosis. Sso1 is member of the Qa subgroup of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, which consist of coiled-coil helices (called SNARE motifs) that mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complexes mediate 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.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....
gi 568950036 200 LNEISARHSEIQQLERSIRELHEIFTFLATEVEMQGEMIKGDDQ 243
Cdd:cd15849    1 LGEVQARHNEIQRIEQTLTELAQLFNDMATLVEQQDEVIQQIEQ 44

SNARE motif of syntaxin 11; Syntaxin 11 (also known as STX11, FHL4, HLH4, HPLH4) is present on endosomal membranes, including late endosomes and lysosomes in macrophages, and has been shown to bind Vti1b and regulate the availability of Vti1b to form other SNARE-complexes. Mutations in human STX11 has been linked to familial hemophagocytic lymphohistiocytosis type-4 (FHL-4), an autosomal recessive disorder of immune dysregulation. Syntaxin 11 is a member of the Qa subgroup of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, which consist of coiled-coil helices (called SNARE motifs) that mediate the interactions between SNARE proteins, and a transmembrane domain. The SNARE complexes mediate 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.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|
gi 568950036 199 ALNEISARHSEIQQLERSIRELHEIFTFLATEVEMQGEMI 238
Cdd:cd15878    1 ALNEIETRHKELLELESRIREVHELFLQMALLVEEQADTL 40

t-SNARE complex subunit, syntaxin [Intracellular trafficking and secretion];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 568950036  46 QTIRQTMAKLESKVRELEKQQVtILATPLPEESMKQglqnlREEIKQLGREVRAQLKAIEPQKEEADENYNSVNTRMKkt 125
Cdd:COG5325   41 ASVDQELTAVRRSISRLGKVYA-KHTEPSFSDKSEK-----EDEIDELSKKVNQDLQRCEKILKTKYKNLQSSFLQSK-- 112

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 568950036 126 qhgvLSQQFVELINKCNSMQSEYREKNVERIRRQ----LKITNAGMVSDEELEQMLDSGQSEVFVSNILKDTQVTRQALN 201
Cdd:COG5325  113 ----LLRDLNTECMEGQRIQQKSAQFRKYQVLQAkflrNKNNDQHPLEEEEDEESLSSLGSQQTLQQQGLSNEELEYQQI 188

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*
gi 568950036 202 EISARHSEIQQLERSIRELHEIFTFLATEVEMQGEMIKGDDQSIY 246
Cdd:COG5325  189 LITERDEEIKNLARGIYELNEIFRDLGSLVGEQGELVDRIDFNIE 233