Recombinant Human Cyclin-dependent kinase 12 (CDK12), Truncated

Uniprot Id

Q9NYV4

Target Species

Human

Target Name

CDK12

Target Full Name

Cyclin-dependent kinase 12

Target Function

Cyclin-dependent kinase that phosphorylates the C-terminal domain (CTD) of the large subunit of RNA polymerase II (POLR2A), thereby acting as a key regulator of transcription elongation. Regulates the expression of genes involved in DNA repair and is required for the maintenance of genomic stability. Preferentially phosphorylates 'Ser-5' in CTD repeats that are already phosphorylated at 'Ser-7', but can also phosphorylate 'Ser-2'. Required for RNA splicing, possibly by phosphorylating SRSF1/SF2. Involved in regulation of MAP kinase activity, possibly leading to affect the response to estrogen inhibitors.

Target Involvement

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.

Target Subcellular Location

Nucleus. Nucleus speckle. Note=Colocalized with nuclear speckles throughout interphase.

Target Protein Families

Protein kinase superfamily, CMGC Ser/Thr protein kinase family, CDC2/CDKX subfamily

Target Tissue Specificity

Ubiquitously expressed.

Target Synonyms

arginine/serine-rich; Cdc2 related kinase arginine/serine rich; CDC2 related protein kinase 7; Cdc2-related kinase; CDC2-related protein kinase 7; Cdk12; CDK12_HUMAN; Cell division cycle 2 related protein kinase 7; Cell division cycle 2-related protein kinase 7; Cell division protein kinase 12; CRK7; CRKR; CrkRS; Cyclin-dependent kinase 12; EC 2.7.11.22; hCDK12; kiaa0904; Pksc

Target Background

Enables RNA polymerase II CTD heptapeptide repeat kinase activity and cyclin binding activity. Involved in phosphorylation of RNA polymerase II C-terminal domain; protein autophosphorylation; and regulation of MAP kinase activity. Located in nuclear speck. Part of cyclin K-CDK12 complex.