Annotations: 4YX5

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Surface presentation of antigens (SPOA)	8098672	3001883	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF01052	e4yx5A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Surface presentation of antigens (SPOA)	F: PF01052	ECOD (1.6)
B	PF01052	e4yx5B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Surface presentation of antigens (SPOA)	F: PF01052	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.30.330.10	Mainly Beta	Roll	Surface presentation of antigens (SPOA)	SpoA-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF01052	Type III flagellar switch regulator (C-ring) FliN C-term (FliMN_C)	Type III flagellar switch regulator (C-ring) FliN C-term	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Surface presentation of antigens protein SpaO	-	positive chemotaxis chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion bacterial-type flagellum-dependent swarming motility bacterial-type flagellum-dependent cell motility cellular process cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility protein localization positive chemotaxis chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion bacterial-type flagellum-dependent swarming motility bacterial-type flagellum-dependent cell motility cellular process cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility protein localization establishment of protein localization cellular localization nitrogen compound transport transport secretion organic substance transport protein secretion by the type III secretion system establishment of protein localization to extracellular region export from cell protein secretion establishment of localization protein localization to extracellular region transmembrane transport localization secretion by cell protein transmembrane transport protein transport cellular macromolecule localization macromolecule localization	-
B	Surface presentation of antigens protein SpaO	-	positive chemotaxis chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion bacterial-type flagellum-dependent swarming motility bacterial-type flagellum-dependent cell motility cellular process cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility protein localization positive chemotaxis chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion bacterial-type flagellum-dependent swarming motility bacterial-type flagellum-dependent cell motility cellular process cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility protein localization establishment of protein localization cellular localization nitrogen compound transport transport secretion organic substance transport protein secretion by the type III secretion system establishment of protein localization to extracellular region export from cell protein secretion establishment of localization protein localization to extracellular region transmembrane transport localization secretion by cell protein transmembrane transport protein transport cellular macromolecule localization macromolecule localization	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR003283	Type III secretion system outer membrane, SpaO	Family
A	IPR001543	Flagellar motor switch protein FliN-like, C-terminal domain	Domain
A	IPR036429	SpoA-like superfamily	Homologous Superfamily
A	IPR013385	Type III secretion system apparatus protein YscQ/HrcQ/SpaO	Family
B	IPR003283	Type III secretion system outer membrane, SpaO	Family
B	IPR001543	Flagellar motor switch protein FliN-like, C-terminal domain	Domain
B	IPR036429	SpoA-like superfamily	Homologous Superfamily
B	IPR013385	Type III secretion system apparatus protein YscQ/HrcQ/SpaO	Family

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.