4DQ9

Crystal structure of the minor pseudopilin EPSH from the type II secretion system of Vibrio cholerae

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	GspH-like	8047116	4005454	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Pili subunits	8105542	3000097	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Pili subunits	8105542	3000097	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	GspH	e4dq9A1	A: a+b two layers	X: Pili subunits (From Topology)	H: Pili subunits (From Topology)	T: Pili subunits	F: GspH	ECOD (1.6)
B	GspH	e4dq9B1	A: a+b two layers	X: Pili subunits (From Topology)	H: Pili subunits (From Topology)	T: Pili subunits	F: GspH	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.55.40.10	Alpha Beta	3-Layer(bab) Sandwich	minor pseudopilin epsh fold	minor pseudopilin epsh domain	CATH (4.3.0)
B	3.55.40.10	Alpha Beta	3-Layer(bab) Sandwich	minor pseudopilin epsh fold	minor pseudopilin epsh domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF12019	Type II transport protein GspH (GspH)	Type II transport protein GspH	GspH is involved in bacterial type II export systems [1]. Like all pilins, GspH has an N terminus alpha helix [1]. This helix is followed by nine beta strands forming two beta sheets, one of five antiparallel strands and one of four antiparallel stra ...	GspH is involved in bacterial type II export systems [1]. Like all pilins, GspH has an N terminus alpha helix [1]. This helix is followed by nine beta strands forming two beta sheets, one of five antiparallel strands and one of four antiparallel strands [1]. GspH is a minor pseudopilin; it is expressed much less than other pseudopilins in the type II secretion pilus (major pilins) [1]. The function and localisation of minor pseudo-pilins are still to be fully unraveled [1]. It has been suggested that some minor pseudopilins may assemble either into the base or the tip of pili, or both. They function as initiators or regulators of pilus biogenesis and dynamics, and/or as adaptors between various pseudopilin component and other members of the T2SS [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	General secretion pathway protein H	-	protein localization protein transport across the cell outer membrane establishment of protein localization cellular localization nitrogen compound transport transport secretion establishment of protein localization to extracellular region export from cell protein secretion by the type II secretion system protein secretion establishment of localization protein localization to extracellular region transmembrane transport localization protein localization protein transport across the cell outer membrane establishment of protein localization cellular localization nitrogen compound transport transport secretion establishment of protein localization to extracellular region export from cell protein secretion by the type II secretion system 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 cellular process	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex type II protein secretion system complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR002416	Type II secretion system protein GspH-like	Family
A, B	IPR022346	General secretion pathway, GspH	Domain
A, B	IPR049875	Type II secretion system minor pseudopilin GspH	Family
A, B	IPR012902	Prokaryotic N-terminal methylation site	PTM
A, B	IPR051621	Type II secretion system protein J	Family
A, B	IPR045584	Pilin-like	Homologous Superfamily

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.