Annotations: 4BUG

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	F_UNCLASSIFIED	e4bugA16	A: beta barrels	X: OB-fold	H: Pilus-presented adhesin barrel insertion domain (From Topology)	T: Pilus-presented adhesin barrel insertion domain	F: F_UNCLASSIFIED	ECOD (1.6)
A	PF17802	e4bugA14	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: PF17802	ECOD (1.6)
A	PF19407	e4bugA13	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: PF19407	ECOD (1.6)
A	PF08341	e4bugA15	A: alpha arrays	X: Pilus-presented adhesin helical insertion domain (From Topology)	H: Pilus-presented adhesin helical insertion domain (From Topology)	T: Pilus-presented adhesin helical insertion domain	F: PF08341	ECOD (1.6)
B	F_UNCLASSIFIED	e4bugB16	A: beta barrels	X: OB-fold	H: Pilus-presented adhesin barrel insertion domain (From Topology)	T: Pilus-presented adhesin barrel insertion domain	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF17802	e4bugB14	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: PF17802	ECOD (1.6)
B	PF19407	e4bugB13	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: PF19407	ECOD (1.6)
B	PF08341	e4bugB15	A: alpha arrays	X: Pilus-presented adhesin helical insertion domain (From Topology)	H: Pilus-presented adhesin helical insertion domain (From Topology)	T: Pilus-presented adhesin helical insertion domain	F: PF08341	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	2.30.30.670	Mainly Beta	Roll	SH3 type barrels.	Thioester domain	CATH (4.3.0)
A	1.10.150.480	Mainly Alpha	Orthogonal Bundle	DNA polymerase	domain 1	CATH (4.3.0)
A	2.60.40.1140	Mainly Beta	Sandwich	Immunoglobulin-like	Collagen-binding surface protein Cna, B-type domain	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	2.30.30.670	Mainly Beta	Roll	SH3 type barrels.	Thioester domain	CATH (4.3.0)
B	1.10.150.480	Mainly Alpha	Orthogonal Bundle	DNA polymerase	domain 1	CATH (4.3.0)
B	2.60.40.1140	Mainly Beta	Sandwich	Immunoglobulin-like	Collagen-binding surface protein Cna, B-type domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF08341	Thioester domain (TED)	Thioester domain	This domain is found near the N-terminus of a variety of bacterial surface proteins and pili. This domain contains an unusual covalent ester bond between a conserved cysteine and glutamine residue [1].	Domain
A, B	PF17802	Prealbumin-like fold domain (SpaA)	Prealbumin-like fold domain	This entry contains a prealbumin-like domain from a wide variety of bacterial surface proteins. This entry corresponds to domain 1 and domain 3 of SpaA from Corynebacterium diphtheriae [1]. Some members of this family contain an isopeptide bond.	Domain
A, B	PF19407	Domain of unknown function (DUF5979) (DUF5979)	Domain of unknown function (DUF5979)	This domain is found as tandem repeats in bacterial cell surface proteins, associated with TED adhesive domains. This domain contains a conserved lysine, glutamic acid and asparagine diagnostic of an intradomain isopeptide bond.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	ANCILLARY PROTEIN 1	-	-	membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B	IPR046022	Domain of unknown function DUF5979	Domain
A, B	IPR041033	Prealbumin-like fold domain	Domain
A, B	IPR023849	TQXA domain	Domain
A, B	IPR013552	Thioester domain	Domain

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.