Annotations: 2XHE

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Sec1/munc18-like (SM) proteins	8066434	4002933	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Sec1/munc18-like	8066435	3001920	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Syntaxin	e2xheB4	A: alpha bundles	X: STAT-like	H: t-snare proteins (From Topology)	T: t-snare proteins	F: Syntaxin	ECOD (1.6)
A	Sec1_3rd	e2xheA3	A: alpha complex topology	X: alpha-helical domain in sec1/munc18-like (SM) proteins (From Topology)	H: alpha-helical domain in sec1/munc18-like (SM) proteins (From Topology)	T: alpha-helical domain in sec1/munc18-like (SM) proteins	F: Sec1_3rd	ECOD (1.6)
A	Sec1_1st_1	e2xheA2	A: a/b three-layered sandwiches	X: Rossmann-like domains in Sec1/munc18-like proteins (From Topology)	H: Rossmann-like domains in Sec1/munc18-like proteins (From Topology)	T: Rossmann-like domains in Sec1/munc18-like proteins	F: Sec1_1st_1	ECOD (1.6)
A	Sec1_2nd	e2xheA4	A: a/b three-layered sandwiches	X: Rossmann-like domains in Sec1/munc18-like proteins (From Topology)	H: Rossmann-like domains in Sec1/munc18-like proteins (From Topology)	T: Rossmann-like domains in Sec1/munc18-like proteins	F: Sec1_2nd	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.20.58.70	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
A	3.40.50.2060	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Sec1/Munc18 (SM) protein, domain 1	CATH (4.3.0)
A	3.40.50.1910	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Sec1/Munc18 (SM) protein, domain 2	CATH (4.3.0)
A	3.90.830.10	Alpha Beta	Alpha-Beta Complex	Syntaxin Binding Protein 1	Chain A, domain 2	CATH (4.3.0)
A	1.25.40.60	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF05739	SNARE domain (SNARE)	SNARE domain	-	Family
B	PF00804	Syntaxin (Syntaxin)	Syntaxin	Syntaxins are the prototype family of SNARE proteins. They usually consist of three main regions - a C-terminal transmembrane region, a central SNARE domain which is characteristic of and conserved in all syntaxins (Pfam:PF05739), and an N-terminal d ...	Syntaxins are the prototype family of SNARE proteins. They usually consist of three main regions - a C-terminal transmembrane region, a central SNARE domain which is characteristic of and conserved in all syntaxins (Pfam:PF05739), and an N-terminal domain that is featured in this entry. This domain varies between syntaxin isoforms; in syntaxin 1A (Swiss:O35526) it is found as three alpha-helices with a left-handed twist. It may fold back on the SNARE domain to allow the molecule to adopt a 'closed' configuration that prevents formation of the core fusion complex - it thus has an auto-inhibitory role. The function of syntaxins is determined by their localisation. They are involved in neuronal exocytosis, ER-Golgi transport and Golgi-endosome transport, for example. They also interact with other proteins as well as those involved in SNARE complexes. These include vesicle coat proteins, Rab GTPases, and tethering factors [6].	Domain
A	PF00995	Sec1 family (Sec1)	Sec1 family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	SYNTAXIN1	protein binding binding SNARE binding SNAP receptor activity protein-macromolecule adaptor activity molecular adaptor activity	protein localization cellular localization establishment of protein localization nitrogen compound transport transport organic substance transport intracellular transport establishment of localization localization protein transport establishment of localization in cell cellular macromolecule localization macromolecule localization cellular process protein localization cellular localization establishment of protein localization nitrogen compound transport transport organic substance transport intracellular transport establishment of localization localization protein transport establishment of localization in cell cellular macromolecule localization macromolecule localization cellular process intracellular protein transport membrane organization membrane fusion organelle membrane fusion vesicle-mediated transport vesicle organization cellular component organization organelle fusion organelle organization cellular component organization or biogenesis vesicle fusion secretion by cell exocytosis secretion export from cell organelle localization by membrane tethering organelle localization vesicle docking membrane docking	cellular anatomical entity endomembrane system SNARE complex protein-containing complex intracellular anatomical structure membrane membrane protein complex cytoplasm cell periphery plasma membrane
A	UNC18	protein binding binding SNARE binding syntaxin binding	localization transport cellular process establishment of localization vesicle-mediated transport protein localization cellular localization establishment of protein localization nitrogen compound transport organic substance transport intracellular transport protein transport establishment of localization in cell cellular macromolecule localization localization transport cellular process establishment of localization vesicle-mediated transport protein localization cellular localization establishment of protein localization nitrogen compound transport organic substance transport intracellular transport protein transport establishment of localization in cell cellular macromolecule localization macromolecule localization intracellular protein transport secretion export from cell membrane docking organelle localization by membrane tethering secretion by cell exocytosis organelle localization vesicle docking exocytic process vesicle docking involved in exocytosis	cell periphery plasma membrane membrane cellular anatomical entity membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle organelle secretory granule secretory vesicle cell periphery plasma membrane membrane cellular anatomical entity membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR006012	Syntaxin/epimorphin, conserved site	Conserved Site
B	IPR000727	Target SNARE coiled-coil homology domain	Domain
B	IPR010989	SNARE	Homologous Superfamily
B	IPR006011	Syntaxin, N-terminal domain	Domain
B	IPR045242	Syntaxin	Family
A	IPR027482	Sec1-like, domain 2	Homologous Superfamily
A	IPR043127	Sec1-like, domain 3a	Homologous Superfamily
A	IPR001619	Sec1-like protein	Family
A	IPR043154	Sec1-like, domain 1	Homologous Superfamily
A	IPR036045	Sec1-like superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
B	OPM				Syntaxin

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.