CDK9 Antibody – Polyclonal

The protein encoded by this gene is a member of the cyclin-dependent protein kinase (CDK) family. CDK family members are highly similar to the gene products of S. cerevisiae cdc28, and S. pombe cdc2, and known as important cell cycle regulators. This kinase was found to be a component of the multiprotein complex TAK/P-TEFb, which is an elongation factor for RNA polymerase II-directed transcription and functions by phosphorylating the C-terminal domain of the largest subunit of RNA polymerase II. This protein forms a complex with and is regulated by its regulatory subunit cyclin T or cyclin K. HIV-1 Tat protein was found to interact with this protein and cyclin T, which suggested a possible involvement of this protein in AIDS. [provided by RefSeq, Jul 2008]

CDK9: a protein kinase of the CDK family. Forms a complex with and is regulated by its regulatory subunit cyclin T or cyclin K. A component of the multiprotein complex TAK/P-TEFb, which is an elongation factor for RNA polymerase II-directed transcription and functions by phosphorylating the C-terminal domain of the largest subunit of RNA polymerase II. Transcriptional elongation factor and cofactor for HIV Tat protein; RNAi blocks HIV replication, and inhibitors also block varicella zoster replication. Mediates signals leading to cardiac hypertrophy. Inhibitor: Flavopiridol.

Protein type: Protein kinase, CMGC; Protein kinase, Ser/Thr (non-receptor); EC 2.7.11.23; EC 2.7.11.22; Nuclear receptor co-regulator; Cell cycle regulation; Kinase, protein; CMGC group; CDK family; CDK/CDK9 subfamily; CDK9 subfamily

Chromosomal Location of Human Ortholog: 9q34.1

Cellular Component: cytoplasm; intracellular membrane-bound organelle; membrane; nucleoplasm; PML body; transcription elongation factor complex; transcription elongation factor complex b

Molecular Function: ATP binding; chromatin binding; cyclin-dependent protein kinase activity; DNA binding; kinase activity; protein binding; protein kinase activity; protein serine/threonine kinase activity; RNA polymerase subunit kinase activity

Biological Process: cell proliferation; DNA repair; positive regulation of histone phosphorylation; positive regulation of transcription from RNA polymerase II promoter; positive regulation of viral transcription; protein amino acid phosphorylation; regulation of DNA repair; regulation of histone modification; regulation of mitotic cell cycle; regulation of muscle cell differentiation; replication fork processing; response to drug; RNA elongation from RNA polymerase II promoter; snRNA transcription from RNA polymerase II promoter; transcription from RNA polymerase II promoter; transcription initiation from RNA polymerase II promoter