3IFU

The Crystal Structure of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) Leader Protease Nsp1

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF05410	e3ifuA2	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: PF05410	ECOD (1.6)
A	PF21905	e3ifuA1	A: few secondary structure elements	X: Rubredoxin-like	H: Zinc finger in leader protease Nsp1alpha (From Topology)	T: Zinc finger in leader protease Nsp1alpha	F: PF21905	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	4.10.80.390	Few Secondary Structures	Irregular	Rhinovirus 14, subunit 4		CATH (4.3.0)
A	3.90.70.60	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21905	Nsp1alpha N-terminal zinc finger (Zf-Nsp1alpha)	Nsp1alpha N-terminal zinc finger	Porcine reproductive and respiratory syndrome (PRRS) virus (PRRSV), a positive-strand RNA virus that belongs to the Arteriviridae family of Nidovirales, has been identified as the causative agent of PRRS. Nsp1alpha is the amino (N)-terminal protein i ...	Porcine reproductive and respiratory syndrome (PRRS) virus (PRRSV), a positive-strand RNA virus that belongs to the Arteriviridae family of Nidovirales, has been identified as the causative agent of PRRS. Nsp1alpha is the amino (N)-terminal protein in a polyprotein encoded by the PRRSV genome and is reported to be crucial for subgenomic mRNA synthesis, presumably by serving as a transcription factor. Before functioning in transcription, nsp1alpha proteolytically releases itself from nsp1beta. Nsp1alpha contains a ZF domain (this entry), a papain-like cysteine protease (PCP) domain with a zinc ion unexpectedly bound at the active site (which is essential for proteolytic self-release of nsp1alpha), and a carboxyl-terminal extension (which occupies the substrate binding site of the PCP domain).	Domain
A	PF05410	Porcine arterivirus-type cysteine proteinase alpha (Peptidase_C31)	Porcine arterivirus-type cysteine proteinase alpha	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Non-structural protein	cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein cysteine-type endopeptidase activity hydrolase activity catalytic activity endopeptidase activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid helicase activity RNA helicase activity cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein cysteine-type endopeptidase activity hydrolase activity catalytic activity endopeptidase activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid helicase activity RNA helicase activity ATP-dependent activity, acting on RNA ATP-dependent activity cation binding ion binding binding metal ion binding small molecule binding	symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated suppression of host JAK-STAT cascade biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host signal transduction pathway symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT activity symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity modulation by symbiont of host process cellular process symbiont-mediated perturbation of host signal transduction pathway modulation of process of another organism symbiont-mediated perturbation of host defense response symbiont-mediated suppression of host ISG15-protein conjugation symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated suppression of host JAK-STAT cascade biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host signal transduction pathway symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT activity symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity modulation by symbiont of host process cellular process symbiont-mediated perturbation of host signal transduction pathway modulation of process of another organism symbiont-mediated perturbation of host defense response symbiont-mediated suppression of host ISG15-protein conjugation response to host defenses response to stimulus response to other organism symbiont-mediated perturbation of host immune response response to defenses of other organism symbiont-mediated perturbation of host defenses response to external stimulus response to biotic stimulus symbiont-mediated suppression of host immune response symbiont-mediated suppression of host innate immune response response to host immune response symbiont-mediated suppression of host defenses symbiont-mediated perturbation of host innate immune response response to host response to external biotic stimulus viral gene expression viral protein processing viral process modulation by virus of host process virus-mediated perturbation of host defense response modulation by virus of host cellular process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process symbiont-mediated suppression of host type I interferon-mediated signaling pathway symbiont-mediated suppression of host interferon-mediated signaling pathway	membrane cellular anatomical entity host intracellular membrane-bounded organelle host cellular component host intracellular part host cell cytoplasm host cell part host cell endoplasmic reticulum host intracellular region host cell cytoplasm part host intracellular organelle intracellular anatomical structure cytoplasm host cell membrane membrane cellular anatomical entity host intracellular membrane-bounded organelle host cellular component host intracellular part host cell cytoplasm host cell part host cell endoplasmic reticulum host intracellular region host cell cytoplasm part host intracellular organelle intracellular anatomical structure cytoplasm host cell membrane host cell nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR038155	Arterivirus papain-like cysteine protease alpha (PCPalpha) domain superfamily	Homologous Superfamily
A	IPR008741	Arterivirus papain-like cysteine protease alpha (PCPalpha) domain	Domain
A	IPR025773	Arterivirus papain-like cysteine protease beta (PCPbeta) domain	Domain
A	IPR032785	Replicase polyprotein 1ab, peptidase C33-associated domain	Domain
A	IPR038154	Arterivirus papain-like cysteine protease beta (PCPbeta) domain superfamily	Homologous Superfamily
A	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A	IPR032855	Arterivirus polyprotein, nsp2, immunogenic region	Domain
A	IPR023183	Serine protease, chymotrypsin-like serine protease, C-terminal	Homologous Superfamily
A	IPR008760	Equine arteritis virus peptidase S32	Family
A	IPR038451	Arterivirus nsp7 alpha superfamily	Homologous Superfamily
A	IPR023338	Arterivirus NSP4 peptidase domain	Domain
A	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
A	IPR031932	Arterivirus nonstructural protein 7 alpha	Family
A	IPR008743	Arterivirus Nsp2, peptidase C33	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 R01GM133198.