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	FliMN_C	e4yx5A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Surface presentation of antigens (SPOA)	F: FliMN_C	ECOD (1.6)
B	FliMN_C_1	e4yx5B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Surface presentation of antigens (SPOA)	F: FliMN_C_1	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 (4.2.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF26304	FliM/N C-terminal related (FliMN_C_rel)	FliM/N C-terminal related	This entry represents a domain found central in Surface presentation of antigens protein SpaO from Salmonella typhimurium and related proteins. SpaO is involved in a secretory pathway responsible for the surface presentation of determinants needed fo ...	This entry represents a domain found central in Surface presentation of antigens protein SpaO from Salmonella typhimurium and related proteins. SpaO is involved in a secretory pathway responsible for the surface presentation of determinants needed for the entry of Salmonella species into mammalian cells [1,2]. This domain is homologues to FliM/N C-terminal domain (Pfam:PF01052) and has probably originated via duplication event. SpaO contains two of these domains toward the C terminus that swap in a similar fashion as the FliM and FliN C-terminal domains.	Domain
B	PF01052	Type III flagellar switch regulator (C-ring) FliN C-term (FliMN_C)	Type III flagellar switch regulator (C-ring) FliN C-term	This family includes the C-terminal region of flagellar motor switch proteins FliN and FliM. It is associated with family FliM, Pfam:PF02154 and family FliN_N Pfam:PF16973.	Domain

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 establishment of 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 establishment of protein localization nitrogen compound transport transport secretion 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 macromolecule localization intracellular protein 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 establishment of 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 establishment of protein localization nitrogen compound transport transport secretion 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 macromolecule localization intracellular protein 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 U.S. National Science Foundation (DBI-2321666), 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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.