Annotations: 6IRQ

Complexed crystal structure of PaSSB with ssDNA dT25 at 1.91 angstrom resolution

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8076305	3000135	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Nucleic acid-binding proteins	8076305	3000135	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Nucleic acid-binding proteins	8076305	3000135	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Nucleic acid-binding proteins	8076305	3000135	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	N6_N4_Mtase	e6irqA1	A: beta barrels	X: jelly-roll	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: N6_N4_Mtase	ECOD (v294.2)
B	N6_N4_Mtase	e6irqB1	A: beta barrels	X: jelly-roll	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: N6_N4_Mtase	ECOD (v294.2)
C	N6_N4_Mtase	e6irqC1	A: beta barrels	X: jelly-roll	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: N6_N4_Mtase	ECOD (v294.2)
D	SBP_bac_1	e6irqD1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: SBP_bac_1	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (utative)
B	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (utative)
C	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (utative)
D	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF00436	Single-strand binding protein family (SSB)	Single-strand binding protein family	This family includes single stranded binding proteins and also the primosomal replication protein N (PriB). PriB forms a complex with PriA, PriC and ssDNA.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Single-stranded DNA-binding protein	enzyme regulator activity enzyme activator activity molecular function activator activity molecular function regulator activity DNA binding binding single-stranded DNA binding nucleic acid binding	nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response response to stress DNA repair nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response response to stress DNA repair DNA recombination	cellular anatomical structure nucleoid
E, F	DNA (25-MER)	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR000424	Primosome PriB/single-strand DNA-binding	Family
A, B, C, D	IPR011344	Single-stranded DNA-binding protein	Family
A, B, C, D	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily

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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.