Annotations: 8Y3T

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	RNA bacteriophage capsid protein	8038606	3001853	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	RNA bacteriophage capsid protein	8038606	3001853	SCOP2B (2022-06-29)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01819	Levivirus coat protein (Levi_coat)	Levivirus coat protein	The Levivirus coat protein forms the bacteriophage coat that encapsidates the viral RNA. 180 copies of this protein form the virion shell. The MS2 bacteriophage coat protein controls two distinct processes: sequence-specific RNA encapsidation and re ...	The Levivirus coat protein forms the bacteriophage coat that encapsidates the viral RNA. 180 copies of this protein form the virion shell. The MS2 bacteriophage coat protein controls two distinct processes: sequence-specific RNA encapsidation and repression of replicase translation-by binding to an RNA stem-loop structure of 19 nucleotides containing the initiation codon of the replicase gene. The binding of a coat protein dimer to this hairpin shuts off synthesis of the viral replicase, switching the viral replication cycle to virion assembly rather than continued replication [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Capsid protein	structural molecule activity RNA binding binding nucleic acid binding identical protein binding protein binding	viral gene expression regulation of viral translation regulation of biological process regulation of viral process negative regulation of viral process negative regulation of viral translation viral process biological regulation negative regulation of biological process viral translation regulation of biosynthetic process regulation of cellular process regulation of protein metabolic process primary metabolic process viral gene expression regulation of viral translation regulation of biological process regulation of viral process negative regulation of viral process negative regulation of viral translation viral process biological regulation negative regulation of biological process viral translation regulation of biosynthetic process regulation of cellular process regulation of protein metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression translation macromolecule biosynthetic process regulation of primary metabolic process post-transcriptional regulation of gene expression regulation of gene expression biosynthetic process regulation of translation regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process protein metabolic process regulation of metabolic process	viral capsid T=3 icosahedral viral capsid icosahedral viral capsid virion component

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR002703	Levivirus coat protein	Family
A, B	IPR015954	Bacteriophage RNA-type, capsid	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.