Annotations: 2XCN

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Peptidase_S29	e2xcnA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S29	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 (4.2.0)
B	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.2.0)
A	2.40.10.120	Mainly Beta	Beta Barrel	Thrombin, subunit H		CATH (4.2.0)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.2.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C, D	NS4A	cation binding ion binding binding metal ion binding small molecule binding	viral process	virion component
A, B	NS3 PROTEASE	peptidase activity serine hydrolase activity catalytic activity, acting on a protein serine-type peptidase activity hydrolase activity catalytic activity cation binding ion binding binding metal ion binding small molecule binding	proteolysis self proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host proteolysis self proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction symbiont entry into host cell symbiont entry into host symbiont-mediated perturbation of host cellular process symbiont-mediated perturbation of host process symbiont-mediated transformation of host cell modulation of process of another organism	host cellular component cellular anatomical structure host cell other organism part host cell part host cell membrane membrane virion component virion membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C, D	IPR000745	Hepatitis C virus, Non-structural protein NS4a	Domain
A, B	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A, B	IPR004109	Hepatitis C virus, NS3 protease	Domain

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.