Annotations: 2SNW

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2snwa_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Viral proteases	Viral capsid protein	(Sindbis virus ) [TaxId: 11034 ],	SCOPe (2.08)
B	d2snwb_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Viral proteases	Viral capsid protein	(Sindbis virus ) [TaxId: 11034 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Trypsin-like serine proteases	8071561	3000114	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Trypsin-like serine proteases	8071561	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	Peptidase_S3	e2snwA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S3	ECOD (1.6)
B	Peptidase_S3	e2snwB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: Peptidase_S3	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
B	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, B	PF00944	Alphavirus core protein (Peptidase_S3)	Alphavirus core protein	Also known as coat protein C and capsid protein C. This makes the literature very confusing. Alphaviruses consist of a nucleoprotein core, a lipid membrane which envelopes the core, and glycoprotein spikes protruding from the lipid membrane.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	COAT PROTEIN C	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 RNA binding binding organic cyclic compound binding nucleic acid binding protein binding ubiquitin-like protein ligase binding 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 RNA binding binding organic cyclic compound binding nucleic acid binding protein binding ubiquitin-like protein ligase binding enzyme binding structural molecule activity	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion cellular process cellular component organization or biogenesis symbiont-mediated suppression of host signal transduction pathway symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated perturbation of host process symbiont-mediated suppression of host toll-like receptor signaling pathway symbiont-mediated perturbation of host signal transduction pathway viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion cellular process cellular component organization or biogenesis symbiont-mediated suppression of host signal transduction pathway symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated perturbation of host process symbiont-mediated suppression of host toll-like receptor signaling pathway symbiont-mediated perturbation of host signal transduction pathway modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction import into cell receptor-mediated endocytosis of virus by host cell transport viral life cycle establishment of localization vesicle-mediated transport localization symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell transport of virus viral gene expression viral translational frameshifting viral translation virion attachment to host cell adhesion of symbiont to host cell adhesion of symbiont to host proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	cellular anatomical structure membrane viral capsid icosahedral viral capsid virion component icosahedral viral capsid, spike host cell plasma membrane host cellular component host cell part host cell membrane host intracellular part host cell cytoplasm host intracellular region virion membrane cellular anatomical structure membrane viral capsid icosahedral viral capsid virion component icosahedral viral capsid, spike host cell plasma membrane host cellular component host cell part host cell membrane host intracellular part host cell cytoplasm host intracellular region virion membrane T=4 icosahedral viral capsid host intracellular membrane-bounded organelle host cell nucleus host intracellular organelle viral membrane viral envelope

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR002533	Alphavirus E3 spike glycoprotein	Domain
A, B	IPR038055	Flaviviral glycoprotein E, dimerisation domain	Homologous Superfamily
A, B	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A, B	IPR042304	Alphavirus E2 glycoprotein, domain A	Homologous Superfamily
A, B	IPR036253	Flavivirus glycoprotein, central and dimerisation domain superfamily	Homologous Superfamily
A, B	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A, B	IPR042305	Alphavirus E2 glycoprotein, domain B	Homologous Superfamily
A, B	IPR042306	Alphavirus E2 glycoprotein, domain C	Homologous Superfamily
A, B	IPR000936	Alphavirus E2 glycoprotein	Family
A, B	IPR000930	Peptidase S3, togavirin	Domain
A, B	IPR002548	Alphavirus E1 glycoprotein	Domain
A, B	IPR000336	Flavivirus/Alphavirus glycoprotein, immunoglobulin-like domain superfamily	Homologous Superfamily
A, B	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily

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.