2I53

Crystal structure of Cyclin K

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
Pharos: Disease Associations

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2i53a1	All alpha proteins	Cyclin-like	Cyclin-like	Cyclin	Cyclin K	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Cyclin	8021990	4001102	SCOP2 (2022-06-29)
A	SCOP2 Family	Cyclin	8021992	4001102	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cyclin-like	8034370	3000768	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cyclin-like	8034372	3000768	SCOP2 (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	Cyclin_N_1	e2i53A1	A: alpha arrays	X: HTH	H: HTH	T: Cyclin-like	F: Cyclin_N_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.472.10	Mainly Alpha	Orthogonal Bundle	Cyclin A	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00134	Cyclin, N-terminal domain (Cyclin_N)	Cyclin, N-terminal domain	Cyclins regulate cyclin dependent kinases (CDKs). Swiss:P22674 is a Uracil-DNA glycosylase that is related to other cyclins [4]. Cyclins contain two domains of similar all-alpha fold, of which this family corresponds with the N-terminal domain.	Domain
A	PF21797	Cyclin-T2-like, C-terminal domain (CycT2-like_C)	Cyclin-T2-like, C-terminal domain	This domain is found at the C-terminal end of human Cyclin-T2 (CycT2) and similar animal sequences. CycT2 is the regulatory subunit of the cyclin-dependent kinase pair (CDK9/cyclin T) complex, also called positive transcription elongation factor B (P ...	This domain is found at the C-terminal end of human Cyclin-T2 (CycT2) and similar animal sequences. CycT2 is the regulatory subunit of the cyclin-dependent kinase pair (CDK9/cyclin T) complex, also called positive transcription elongation factor B (P-TEFB). This domain adopts s cyclin box fold consisting of five helices and a short C-terminal helix [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Cyclin K	protein serine/threonine kinase activity cyclin-dependent protein serine/threonine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity cyclin-dependent protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups protein binding binding kinase binding enzyme binding protein serine/threonine kinase activity cyclin-dependent protein serine/threonine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity cyclin-dependent protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups protein binding binding kinase binding enzyme binding protein kinase binding RNA polymerase II CTD heptapeptide repeat modifying activity RNA polymerase II CTD heptapeptide repeat kinase activity cyclin-dependent protein serine/threonine kinase activator activity enzyme regulator activity protein serine/threonine kinase activator activity molecular function activator activity protein kinase regulator activity kinase activator activity enzyme activator activity cyclin-dependent protein serine/threonine kinase regulator activity molecular function regulator activity protein kinase activator activity kinase regulator activity	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process negative regulation by host of viral genome replication biological process involved in interspecies interaction between organisms modulation by host of symbiont process viral life cycle negative regulation by host of viral process modulation by host of viral genome replication biological process involved in symbiotic interaction modulation by host of viral process cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process negative regulation by host of viral genome replication biological process involved in interspecies interaction between organisms modulation by host of symbiont process viral life cycle negative regulation by host of viral process modulation by host of viral genome replication biological process involved in symbiotic interaction modulation by host of viral process viral genome replication viral process biological process involved in interaction with symbiont regulation of cellular process positive regulation of DNA-templated transcription cellular biosynthetic process positive regulation of biological process RNA metabolic process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process positive regulation of metabolic process DNA-templated transcription regulation of RNA metabolic process positive regulation of DNA-templated transcription, elongation positive regulation of biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of DNA-templated transcription elongation regulation of biological process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process biological regulation 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 positive regulation of RNA metabolic process regulation of gene expression DNA-templated transcription elongation biosynthetic process positive regulation of RNA biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process positive regulation of cellular biosynthetic process cell division regulation of signaling signaling regulation of signal transduction cell communication regulation of response to stimulus regulation of cell communication signal transduction transcription by RNA polymerase II regulation of transcription by RNA polymerase II regulation of transcription elongation by RNA polymerase II positive regulation of transcription by RNA polymerase II transcription elongation by RNA polymerase II positive regulation of transcription elongation by RNA polymerase II regulation of protein modification process regulation of catalytic activity regulation of protein phosphorylation regulation of cyclin-dependent protein kinase activity regulation of transferase activity regulation of cyclin-dependent protein serine/threonine kinase activity regulation of phosphate metabolic process phosphate-containing compound metabolic process protein metabolic process cell cycle phosphorus metabolic process protein modification process regulation of cell cycle protein phosphorylation phosphorylation regulation of protein metabolic process regulation of protein kinase activity regulation of molecular function regulation of kinase activity macromolecule modification regulation of protein serine/threonine kinase activity regulation of phosphorylation regulation of phosphorus metabolic process	protein kinase complex transferase complex, transferring phosphorus-containing groups protein-containing complex catalytic complex cyclin K-CDK12 complex serine/threonine protein kinase complex cyclin-dependent protein kinase holoenzyme complex transferase complex membrane-bounded organelle intracellular anatomical structure transcription elongation factor complex nucleus membrane-enclosed lumen nuclear protein-containing complex protein kinase complex transferase complex, transferring phosphorus-containing groups protein-containing complex catalytic complex cyclin K-CDK12 complex serine/threonine protein kinase complex cyclin-dependent protein kinase holoenzyme complex transferase complex membrane-bounded organelle intracellular anatomical structure transcription elongation factor complex nucleus membrane-enclosed lumen nuclear protein-containing complex intracellular organelle lumen intracellular organelle nucleoplasm cyclin/CDK positive transcription elongation factor complex intracellular membrane-bounded organelle cellular anatomical entity organelle lumen carboxy-terminal domain protein kinase complex organelle nuclear cyclin-dependent protein kinase holoenzyme complex nuclear lumen cyclin K-CDK13 complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR004367	Cyclin, C-terminal domain	Domain
A	IPR006671	Cyclin, N-terminal	Domain
A	IPR036915	Cyclin-like superfamily	Homologous Superfamily
A	IPR043198	Cyclin/Cyclin-like subunit Ssn8	Family
A	IPR013763	Cyclin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: O75909	malignant pancreatic neoplasm pancreatic ductal adenocarcinoma osteosarcoma psoriasis ovarian cancer

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.