CDK12 a Ser/Thr protein kinase of the CMGC group and CDK family. Phosphorylates the C-terminal heptapeptide repeat domain (CTD) of the largest RNA polymerase II subunit RPB1, thereby acting as a key regulator of transcription elongation. Required for RNA splicing, possibly by phosphorylating SRSF1/SF2. Interacts with CCNL1 and CCNL2. Colocalized with nuclear speckles throughout interphase. Has a highly phosphorylated arginine/serine-rich (RS) domain N-terminal to the kinase domain. Chromosomal aberrations involving CDK12 may be a cause gastric cancer. Deletions within 17q12 region producing fusion transcripts with ERBB2, leading to CDK12-ERBB2 fusion leading to trunctated CDK12 protein not in-frame with ERBB2. Three isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: CDK family; CDK/CRK7 subfamily; CMGC group; CRK7 subfamily; Cell cycle regulation; EC; EC; Kinase, protein; Motility/polarity/chemotaxis; Protein kinase, CMGC; Protein kinase, Ser/Thr (non-receptor); RNA splicing; Spliceosome
Chromosomal Location of Human Ortholog: 17q12
Cellular Component:  cyclin K-CDK12 complex; fibrillar center; nuclear cyclin-dependent protein kinase holoenzyme complex; nuclear speck; nucleoplasm; nucleus
Molecular Function:  ATP binding; cyclin binding; protein binding; protein kinase activity; protein kinase binding; RNA polymerase II CTD heptapeptide repeat kinase activity
Biological Process:  mRNA processing; negative regulation of stem cell differentiation; phosphorylation of RNA polymerase II C-terminal domain; protein autophosphorylation; regulation of cell cycle; regulation of MAP kinase activity; regulation of RNA splicing; RNA splicing
Reference #:  Q9NYV4 (UniProtKB)
Alt. Names/Synonyms: Cdc2-related kinase, arginine/serine-rich; CDC2-related protein kinase 7; CDK12; Cell division cycle 2-related protein kinase 7; Cell division protein kinase 12; CRK7; CRKR; CRKRS; Cyclin-dependent kinase 12; KIAA0904
Gene Symbols: CDK12
Molecular weight: 164,155 Da
Basal Isoelectric point: 9.46  Predict pI for various phosphorylation states
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Protein Structure Not Found.

Cross-references to other databases:  STRING  |  cBioPortal  |  Wikipedia  |  neXtProt  |  Protein Atlas  |  BioGPS  |  KinBase  |  Pfam  |  RCSB PDB  |  ENZYME  |  Phospho.ELM  |  NetworKIN  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene  |  Ensembl Protein