Annotations: 2IX2

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d2ix2b1	Alpha and beta proteins (a+b)	DNA clamp	DNA clamp	automated matches	automated matches	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
C	d2ix2c1	Alpha and beta proteins (a+b)	DNA clamp	DNA clamp	automated matches	automated matches	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PCNA_C	e2ix2A2	A: a+b two layers	X: DNA clamp (From Topology)	H: DNA clamp (From Topology)	T: DNA clamp	F: PCNA_C	ECOD (1.6)
A	PCNA_N_1	e2ix2A1	A: a+b two layers	X: DNA clamp (From Topology)	H: DNA clamp (From Topology)	T: DNA clamp	F: PCNA_N_1	ECOD (1.6)
B	PCNA_C	e2ix2B2	A: a+b two layers	X: DNA clamp (From Topology)	H: DNA clamp (From Topology)	T: DNA clamp	F: PCNA_C	ECOD (1.6)
B	PCNA_N_1	e2ix2B1	A: a+b two layers	X: DNA clamp (From Topology)	H: DNA clamp (From Topology)	T: DNA clamp	F: PCNA_N_1	ECOD (1.6)
C	PCNA_C	e2ix2C2	A: a+b two layers	X: DNA clamp (From Topology)	H: DNA clamp (From Topology)	T: DNA clamp	F: PCNA_C	ECOD (1.6)
C	PCNA_N_1	e2ix2C1	A: a+b two layers	X: DNA clamp (From Topology)	H: DNA clamp (From Topology)	T: DNA clamp	F: PCNA_N_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.70.10.10	Alpha Beta	Box	Proliferating Cell Nuclear Antigen		CATH (4.3.0)
B	3.70.10.10	Alpha Beta	Box	Proliferating Cell Nuclear Antigen		CATH (4.3.0)
C	3.70.10.10	Alpha Beta	Box	Proliferating Cell Nuclear Antigen		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF02747	Proliferating cell nuclear antigen, C-terminal domain (PCNA_C)	Proliferating cell nuclear antigen, C-terminal domain	N-terminal and C-terminal domains of PCNA are topologically identical. Three PCNA molecules are tightly associated to form a closed ring encircling duplex DNA.	Domain
B	PF00705	Proliferating cell nuclear antigen, N-terminal domain (PCNA_N)	Proliferating cell nuclear antigen, N-terminal domain	N-terminal and C-terminal domains of PCNA are topologically identical. Three PCNA molecules are tightly associated to form a closed ring encircling duplex DNA.	Domain
C	PF02747	Proliferating cell nuclear antigen, C-terminal domain (PCNA_C)	Proliferating cell nuclear antigen, C-terminal domain	N-terminal and C-terminal domains of PCNA are topologically identical. Three PCNA molecules are tightly associated to form a closed ring encircling duplex DNA.	Domain
C	PF00705	Proliferating cell nuclear antigen, N-terminal domain (PCNA_N)	Proliferating cell nuclear antigen, N-terminal domain	N-terminal and C-terminal domains of PCNA are topologically identical. Three PCNA molecules are tightly associated to form a closed ring encircling duplex DNA.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DNA POLYMERASE SLIDING CLAMP B	DNA binding binding organic cyclic compound binding nucleic acid binding enzyme regulator activity DNA polymerase processivity factor activity enzyme activator activity molecular function activator activity molecular function regulator activity	DNA-templated DNA replication primary metabolic process DNA metabolic process leading strand elongation nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of biological process regulation of cellular process DNA-templated DNA replication primary metabolic process DNA metabolic process leading strand elongation nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of biological process regulation of cellular process biological regulation regulation of macromolecule metabolic process regulation of primary metabolic process regulation of nucleobase-containing compound metabolic process regulation of metabolic process regulation of DNA replication regulation of DNA metabolic process	-
B	DNA POLYMERASE SLIDING CLAMP C	DNA binding binding organic cyclic compound binding nucleic acid binding enzyme regulator activity DNA polymerase processivity factor activity enzyme activator activity molecular function activator activity molecular function regulator activity	DNA-templated DNA replication primary metabolic process DNA metabolic process leading strand elongation nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of biological process regulation of cellular process DNA-templated DNA replication primary metabolic process DNA metabolic process leading strand elongation nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of biological process regulation of cellular process biological regulation regulation of macromolecule metabolic process regulation of primary metabolic process regulation of nucleobase-containing compound metabolic process regulation of metabolic process regulation of DNA replication regulation of DNA metabolic process	-
C	DNA POLYMERASE SLIDING CLAMP A	DNA binding binding organic cyclic compound binding nucleic acid binding enzyme regulator activity DNA polymerase processivity factor activity enzyme activator activity molecular function activator activity molecular function regulator activity	DNA-templated DNA replication primary metabolic process DNA metabolic process leading strand elongation nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of biological process regulation of cellular process DNA-templated DNA replication primary metabolic process DNA metabolic process leading strand elongation nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of biological process regulation of cellular process biological regulation regulation of macromolecule metabolic process regulation of primary metabolic process regulation of nucleobase-containing compound metabolic process regulation of metabolic process regulation of DNA replication regulation of DNA metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR046938	DNA clamp superfamily	Homologous Superfamily
A	IPR000730	Proliferating cell nuclear antigen, PCNA	Family
A	IPR022648	Proliferating cell nuclear antigen, PCNA, N-terminal	Domain
B	IPR046938	DNA clamp superfamily	Homologous Superfamily
B	IPR000730	Proliferating cell nuclear antigen, PCNA	Family
B	IPR022649	Proliferating cell nuclear antigen, PCNA, C-terminal	Domain
B	IPR022659	Proliferating cell nuclear antigen, PCNA, conserved site	Conserved Site
B	IPR022648	Proliferating cell nuclear antigen, PCNA, N-terminal	Domain
C	IPR046938	DNA clamp superfamily	Homologous Superfamily
C	IPR000730	Proliferating cell nuclear antigen, PCNA	Family
C	IPR022649	Proliferating cell nuclear antigen, PCNA, C-terminal	Domain
C	IPR022659	Proliferating cell nuclear antigen, PCNA, conserved site	Conserved Site
C	IPR022648	Proliferating cell nuclear antigen, PCNA, N-terminal	Domain

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.