Annotations: 3H09

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Peptidase_S6_N	e3h09B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S6_N	ECOD (1.6)
B	Peptidase_S6_C	e3h09B2	A: beta duplicates or obligate multimers	X: Single-stranded right-handed beta-helix	H: Pectin lyase-like (From Topology)	T: Pectin lyase-like	F: Peptidase_S6_C	ECOD (1.6)
B	Peptidase_S6_C_1	e3h09B3	A: a+b two layers	X: Domain 2 in immunoglobulin A protease (From Topology)	H: Domain 2 in immunoglobulin A protease (From Topology)	T: Domain 2 in immunoglobulin A protease	F: Peptidase_S6_C_1	ECOD (1.6)
A	Peptidase_S6_N	e3h09A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S6_N	ECOD (1.6)
A	Peptidase_S6_C	e3h09A3	A: beta duplicates or obligate multimers	X: Single-stranded right-handed beta-helix	H: Pectin lyase-like (From Topology)	T: Pectin lyase-like	F: Peptidase_S6_C	ECOD (1.6)
A	Peptidase_S6_C_1	e3h09A2	A: a+b two layers	X: Domain 2 in immunoglobulin A protease (From Topology)	H: Domain 2 in immunoglobulin A protease (From Topology)	T: Domain 2 in immunoglobulin A protease	F: Peptidase_S6_C_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.40.10.120	Mainly Beta	Beta Barrel	Thrombin, subunit H		CATH (4.3.0)
B	2.160.20.20	Mainly Beta	3 Solenoid	Pectate Lyase C-like		CATH (4.3.0)
B	3.30.160.280	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain		CATH (4.3.0)
B	4.10.1240.40	Few Secondary Structures	Irregular	Hormone receptor fold		CATH (4.3.0)
A	2.40.10.120	Mainly Beta	Beta Barrel	Thrombin, subunit H		CATH (4.3.0)
A	2.160.20.20	Mainly Beta	3 Solenoid	Pectate Lyase C-like		CATH (4.3.0)
A	3.30.160.280	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain		CATH (4.3.0)
A	4.10.1240.40	Few Secondary Structures	Irregular	Hormone receptor fold		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02395	Immunoglobulin A1 protease (Peptidase_S6)	Immunoglobulin A1 protease	-	Family
A, B	PF03212	Pertactin (Pertactin)	Pertactin	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Immunoglobulin A1 protease	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity	organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	extracellular region cellular anatomical entity cell surface periplasmic space cell periphery cell outer membrane external encapsulating structure membrane cell envelope outer membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR004899	Pertactin, central region	Domain
A, B	IPR036709	Autotransporter beta-domain superfamily	Homologous Superfamily
A, B	IPR005546	Autotransporter beta-domain	Domain
A, B	IPR000710	Peptidase S6, IgA endopeptidase	Family
A, B	IPR012332	Autotransporter, pectate lyase C-like domain superfamily	Homologous Superfamily
A, B	IPR030396	Peptidase family S6 domain	Domain
A, B	IPR011050	Pectin lyase fold/virulence factor	Homologous Superfamily

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.