CDK7: a protein kinase of the CDK family. Forms a trimeric complex with cyclin H and MAT1, which functions as a Cdk-activating kinase (CAK). Activates the cyclin-associated kinases CDK1, -2, -4 and -6. An essential component of the transcription factor TFIIH, that is involved in transcription initiation and DNA repair. Serves as a direct link between the regulation of transcription and the cell cycle. Phosphorylates and activates RNA polymerase II, allowing its escape from the promoter and elongation of the transcripts. Involved in cell cycle control and in RNA transcription by RNA polymerase II. Its expression and activity are constant throughout the cell cycle.
Protein type: Kinase, protein; EC 2.7.11.22; Protein kinase, CMGC; Protein kinase, Ser/Thr (non-receptor); Nuclear receptor co-regulator; EC 2.7.11.23; Cell cycle regulation; CMGC group; CDK family; CDK7 subfamily; CDK/CDK7 subfamily
Chromosomal Location of Human Ortholog: 5q12.1
Cellular Component: nucleoplasm; holo TFIIH complex; mitochondrion; perinuclear region of cytoplasm; cytoplasm; nucleus
Molecular Function: RNA polymerase subunit kinase activity; protein C-terminus binding; DNA-dependent ATPase activity; protein binding; androgen receptor binding; cyclin-dependent protein kinase activity; transcription coactivator activity; ATP binding; protein kinase activity
Biological Process: transcription from RNA polymerase II promoter; viral reproduction; positive regulation of viral transcription; positive regulation of transcription, DNA-dependent; protein amino acid phosphorylation; regulation of gene expression, epigenetic; mRNA capping; negative regulation of gene expression, epigenetic; transcription-coupled nucleotide-excision repair; nucleotide-excision repair, DNA damage removal; G2/M transition of mitotic cell cycle; cell cycle arrest; transcription initiation from RNA polymerase II promoter; transcription from RNA polymerase I promoter; RNA elongation from RNA polymerase I promoter; termination of RNA polymerase I transcription; DNA repair; cell proliferation; cell division; nucleotide-excision repair; androgen receptor signaling pathway; RNA elongation from RNA polymerase II promoter; gene expression; positive regulation of transcription from RNA polymerase II promoter; regulation of cyclin-dependent protein kinase activity; mitotic cell cycle; transcription initiation from RNA polymerase I promoter; G1/S transition of mitotic cell cycle
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