1QB3

CRYSTAL STRUCTURE OF THE CELL CYCLE REGULATORY PROTEIN CKS1

External Resource: Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1qb3a_	Alpha and beta proteins (a+b)	Cell cycle regulatory proteins	Cell cycle regulatory proteins	Cell cycle regulatory proteins	cks1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
B	d1qb3b_	Alpha and beta proteins (a+b)	Cell cycle regulatory proteins	Cell cycle regulatory proteins	Cell cycle regulatory proteins	cks1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
C	d1qb3c_	Alpha and beta proteins (a+b)	Cell cycle regulatory proteins	Cell cycle regulatory proteins	Cell cycle regulatory proteins	cks1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Cell cycle regulatory proteins	8023487	4001729	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cell cycle regulatory proteins	8035867	3000311	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Cell cycle regulatory proteins	8035867	3000311	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Cell cycle regulatory proteins	8035867	3000311	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	CKS	e1qb3A1	A: a+b complex topology	X: Cell cycle regulatory proteins (From Topology)	H: Cell cycle regulatory proteins (From Topology)	T: Cell cycle regulatory proteins	F: CKS	ECOD (1.6)
B	CKS	e1qb3B1	A: a+b complex topology	X: Cell cycle regulatory proteins (From Topology)	H: Cell cycle regulatory proteins (From Topology)	T: Cell cycle regulatory proteins	F: CKS	ECOD (1.6)
C	CKS	e1qb3C1	A: a+b complex topology	X: Cell cycle regulatory proteins (From Topology)	H: Cell cycle regulatory proteins (From Topology)	T: Cell cycle regulatory proteins	F: CKS	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.170.10	Alpha Beta	2-Layer Sandwich	Cyclin-Dependent Kinase Subunit Type 2	Cyclin-dependent kinase, regulatory subunit	CATH (4.3.0)
B	3.30.170.10	Alpha Beta	2-Layer Sandwich	Cyclin-Dependent Kinase Subunit Type 2	Cyclin-dependent kinase, regulatory subunit	CATH (4.3.0)
C	3.30.170.10	Alpha Beta	2-Layer Sandwich	Cyclin-Dependent Kinase Subunit Type 2	Cyclin-dependent kinase, regulatory subunit	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF01111	Cyclin-dependent kinase regulatory subunit (CKS)	Cyclin-dependent kinase regulatory subunit	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	CYCLIN-DEPENDENT KINASES REGULATORY SUBUNIT	protein binding binding histone binding kinase binding enzyme binding protein kinase binding enzyme regulator activity kinase activator activity enzyme activator activity molecular function activator activity molecular function regulator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity protein binding binding histone binding kinase binding enzyme binding protein kinase binding enzyme regulator activity kinase activator activity enzyme activator activity molecular function activator activity molecular function regulator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity ubiquitin binding ubiquitin-like protein binding cyclin-dependent protein serine/threonine kinase activator activity protein serine/threonine kinase activator activity cyclin-dependent protein serine/threonine kinase regulator activity	cellular process cell cycle regulation of mitotic cell cycle regulation of biological process regulation of cellular process biological regulation regulation of cell cycle mitotic cell cycle cell division cellular biosynthetic process RNA metabolic process regulation of primary metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process cellular process cell cycle regulation of mitotic cell cycle regulation of biological process regulation of cellular process biological regulation regulation of cell cycle mitotic cell cycle cell division cellular biosynthetic process RNA metabolic process regulation of primary metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II regulation of biosynthetic process cellular metabolic process primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of macromolecule metabolic process positive regulation of nucleobase-containing compound metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process positive regulation of DNA-templated transcription positive regulation of biological process positive regulation of cellular metabolic process positive regulation of biosynthetic process positive regulation of cellular process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process regulation of cell cycle phase transition regulation of cell cycle process cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition cell cycle process	protein kinase complex transferase complex, transferring phosphorus-containing groups protein-containing complex catalytic complex serine/threonine protein kinase complex cyclin-dependent protein kinase holoenzyme complex transferase complex intracellular anatomical structure cytoplasm cellular anatomical entity cullin-RING ubiquitin ligase complex ubiquitin ligase complex SCF ubiquitin ligase complex intracellular protein-containing complex protein kinase complex transferase complex, transferring phosphorus-containing groups protein-containing complex catalytic complex serine/threonine protein kinase complex cyclin-dependent protein kinase holoenzyme complex transferase complex intracellular anatomical structure cytoplasm cellular anatomical entity cullin-RING ubiquitin ligase complex ubiquitin ligase complex SCF ubiquitin ligase complex intracellular protein-containing complex membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR036858	Cyclin-dependent kinase, regulatory subunit superfamily	Homologous Superfamily
A, B, C	IPR000789	Cyclin-dependent kinase, regulatory subunit	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.