Annotations: 5Y4L

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth B]	SCOP2B Superfamily	Trypsin-like serine proteases	8078276	3000114	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Trypsin-like serine proteases	8078276	3000114	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Trypsin-like serine proteases	8078276	3000114	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Trypsin-like serine proteases	8078276	3000114	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth B]	Peptidase_S32	e5y4lB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S32	ECOD (1.6)
B [auth A]	Peptidase_S32	e5y4lA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S32	ECOD (1.6)
C	Peptidase_S32	e5y4lC1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S32	ECOD (1.6)
D	Peptidase_S32	e5y4lD1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S32	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth B]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
A [auth B]	3.30.40.20	Alpha Beta	2-Layer Sandwich	Herpes Virus-1	Chymotrypsin-like serine protease	CATH (4.3.0)
B [auth A]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
B [auth A]	3.30.40.20	Alpha Beta	2-Layer Sandwich	Herpes Virus-1	Chymotrypsin-like serine protease	CATH (4.3.0)
C	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
C	3.30.40.20	Alpha Beta	2-Layer Sandwich	Herpes Virus-1	Chymotrypsin-like serine protease	CATH (4.3.0)
D	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
D	3.30.40.20	Alpha Beta	2-Layer Sandwich	Herpes Virus-1	Chymotrypsin-like serine protease	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A], C, D	PF05579	Equine arteritis virus serine endopeptidase S32 (Peptidase_S32)	Equine arteritis virus serine endopeptidase S32	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A], C, D	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 endonuclease activity nuclease activity hydrolase activity, acting on ester bonds cation binding ion binding binding metal ion binding small molecule binding	symbiont-mediated suppression of host signal transduction pathway symbiont-mediated perturbation of host NF-kappaB cascade symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated perturbation of host process symbiont-mediated perturbation of host signal transduction pathway symbiont-mediated suppression of host NF-kappaB cascade modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction viral gene expression viral process viral translational frameshifting viral translation symbiont-mediated suppression of host signal transduction pathway symbiont-mediated perturbation of host NF-kappaB cascade symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated perturbation of host process symbiont-mediated perturbation of host signal transduction pathway symbiont-mediated suppression of host NF-kappaB cascade modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction viral gene expression viral process viral translational frameshifting viral translation viral protein processing symbiont-mediated perturbation of host ubiquitin-like protein modification proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process symbiont-mediated perturbation of host defense response symbiont-mediated suppression of host immune response symbiont-mediated suppression of host innate immune response symbiont-mediated perturbation of host immune response symbiont-mediated perturbation of host innate immune response symbiont-mediated suppression of host interferon-mediated signaling pathway symbiont-mediated suppression of host type I interferon-mediated signaling pathway	cellular anatomical structure membrane 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 host cell membrane host cell nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A], C, D	IPR038155	Arterivirus papain-like cysteine protease alpha (PCPalpha) domain superfamily	Homologous Superfamily
A [auth B], B [auth A], C, D	IPR008741	Arterivirus papain-like cysteine protease alpha (PCPalpha) domain	Domain
A [auth B], B [auth A], C, D	IPR025773	Arterivirus papain-like cysteine protease beta (PCPbeta) domain	Domain
A [auth B], B [auth A], C, D	IPR032785	Replicase polyprotein 1ab, peptidase C33-associated domain	Domain
A [auth B], B [auth A], C, D	IPR038154	Arterivirus papain-like cysteine protease beta (PCPbeta) domain superfamily	Homologous Superfamily
A [auth B], B [auth A], C, D	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A [auth B], B [auth A], C, D	IPR054104	Nsp1alpha, N-terminal zinc finger	Domain
A [auth B], B [auth A], C, D	IPR032855	Arterivirus polyprotein, nsp2, immunogenic region	Domain
A [auth B], B [auth A], C, D	IPR023183	Serine protease, chymotrypsin-like serine protease, C-terminal	Homologous Superfamily
A [auth B], B [auth A], C, D	IPR008760	Equine arteritis virus peptidase S32	Family
A [auth B], B [auth A], C, D	IPR038451	Arterivirus nsp7 alpha superfamily	Homologous Superfamily
A [auth B], B [auth A], C, D	IPR023338	Arterivirus NSP4 peptidase domain	Domain
A [auth B], B [auth A], C, D	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
A [auth B], B [auth A], C, D	IPR031932	Arterivirus nonstructural protein 7 alpha	Family
A [auth B], B [auth A], C, D	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 R01GM157729.