Annotations: 3K4X

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3k4xa1	Alpha and beta proteins (a+b)	DNA clamp	DNA clamp	DNA polymerase processivity factor	Proliferating cell nuclear antigen (PCNA)	brewer's yeast,lager beer yeast,yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], brewer's yeast,lager beer yeast,yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], brewer's yeast,lager beer yeast,yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	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	Pyr_redox	e3k4xA1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: HTH	T: winged helix domain	F: Pyr_redox	ECOD (v294.1)

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)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	DNA (5'-D(TPTPTPTPAPTPAPCPGPAPTPGPGPG)-3')	-	-	-
B	DNA (5'-D(CPCPCPAPTPCPGPTPAPT)-3')	-	-	-
A	Proliferating cell nuclear antigen	DNA binding 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 lagging strand elongation primary metabolic process DNA metabolic process 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 leading strand elongation translesion synthesis DNA-templated DNA replication lagging strand elongation primary metabolic process DNA metabolic process 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 leading strand elongation translesion synthesis cellular response to stimulus response to stimulus nucleobase-containing compound biosynthetic process DNA damage tolerance macromolecule biosynthetic process error-free translesion synthesis DNA synthesis involved in DNA replication nucleic acid biosynthetic process biosynthetic process cellular response to stress DNA damage response response to stress DNA biosynthetic process mismatch repair DNA repair 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	membrane-bounded organelle protein-containing complex intracellular anatomical structure PCNA complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle enzyme activator complex DNA polymerase processivity factor complex intracellular organelle cellular anatomical structure organelle

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	IPR022649	Proliferating cell nuclear antigen, PCNA, C-terminal	Domain
A	IPR022659	Proliferating cell nuclear antigen, PCNA, conserved site	Conserved Site
A	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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.