1UNA | pdb_00001una

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1unab_	Alpha and beta proteins (a+b)	RNA bacteriophage capsid protein	RNA bacteriophage capsid protein	RNA bacteriophage capsid protein	GA coat protein	(Enterobacteria phage GA ) [TaxId: 12018 ],	SCOPe (2.08)
A	d1unaa_	Alpha and beta proteins (a+b)	RNA bacteriophage capsid protein	RNA bacteriophage capsid protein	RNA bacteriophage capsid protein	GA coat protein	(Enterobacteria phage GA ) [TaxId: 12018 ],	SCOPe (2.08)

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	RNA bacteriophage capsid protein	8035278	3001853	SCOP2B (2022-06-29)
A	SCOP2 Family	RNA bacteriophage capsid protein	8022898	4001571	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	RNA bacteriophage capsid protein	8035278	3001853	SCOP2 (2022-06-29)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	RWD	e1unaB1	A: beta barrels	X: ETN0001 domain-like	H: ETN0001 domain-like	T: Mss4-like	F: RWD	ECOD (v294.2)
A	RWD	e1unaA1	A: beta barrels	X: ETN0001 domain-like	H: ETN0001 domain-like	T: Mss4-like	F: RWD	ECOD (v294.2)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.30.380.10	Alpha Beta	2-Layer Sandwich	MS2 Viral Coat Protein	MS2 Viral Coat Protein	CATH (4.3.0)
A	3.30.380.10	Alpha Beta	2-Layer Sandwich	MS2 Viral Coat Protein	MS2 Viral Coat Protein	CATH (4.3.0)

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 rep ...	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
A, B	GA UNASSEMBLED COAT PROTEIN DIMER	structural molecule activity RNA binding binding nucleic acid binding	-	viral capsid T=3 icosahedral viral capsid icosahedral viral capsid virion component

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.