2A4Q

HCV NS3 protease with NS4a peptide and a covalently bound macrocyclic ketoamide compound.

External Resource: Annotation

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

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	2.40.10.120	Mainly Beta	Beta Barrel	Thrombin, subunit H		CATH (4.3.0)
C	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
A	2.40.10.120	Mainly Beta	Beta Barrel	Thrombin, subunit H		CATH (4.3.0)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF02907	Hepatitis C virus NS3 protease (Peptidase_S29)	Hepatitis C virus NS3 protease	Hepatitis C virus NS3 protein is a serine protease which has a trypsin-like fold. The non-structural (NS) protein NS3 is one of the NS proteins involved in replication of the HCV genome. NS2-3 proteinase, a zinc-dependent enzyme, performs a single p ...	Hepatitis C virus NS3 protein is a serine protease which has a trypsin-like fold. The non-structural (NS) protein NS3 is one of the NS proteins involved in replication of the HCV genome. NS2-3 proteinase, a zinc-dependent enzyme, performs a single proteolytic cut to release the N-terminus of NS3. The action of NS3 proteinase (NS3P), which resides in the N-terminal one-third of the NS3 protein, then yields all remaining non-structural proteins. The C-terminal two-thirds of the NS3 protein contain a helicase. The functional relationship between the proteinase and helicase domains is unknown. NS3 has a structural zinc-binding site and requires cofactor NS4A.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C	NS3 protease/helicase'	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 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 proteolysis self proteolysis metabolic 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-mediated perturbation of host process transformation of host cell by virus modulation by virus of host process modulation of process of another organism modulation by virus of host cellular process symbiont entry into host cell symbiont entry into host	host cellular component host cell part host cell membrane cellular anatomical entity virion component membrane
B, D	NS4a peptide	-	viral process	virion component

InterPro: Protein Family Classification InterPro Database Homepage

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