Annotations: 8W5D

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	RNA bacteriophage capsid protein	8035305	3001853	SCOP2B (2022-06-29)
B [auth c]	SCOP2B Superfamily	RNA bacteriophage capsid protein	8035305	3001853	SCOP2B (2022-06-29)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth L]	Light Chain	IGKV3	Kappa	minor capsid protein a1 \| unknown	SAbDab (2025-11-14)
A [auth H]	Heavy Chain	IGHV2	-	minor capsid protein a1 \| unknown	SAbDab (2025-11-14)

Chains	Accession	Name	Description	Comments	Source
B [auth c], C	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

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth L]	Light chain of Ab1	-	-	-
B [auth c], C	Minor capsid protein A1	structural molecule activity translation regulator activity translation repressor activity RNA binding binding nucleic acid binding	-	viral capsid T=3 icosahedral viral capsid icosahedral viral capsid virion component
A [auth H]	Heavy chain of Ab1	-	-	-