Hmdb loader
Identification
HMDB Protein ID HMDBP01191
Secondary Accession Numbers
  • 6487
Name Cell division protein kinase 8
Synonyms
  1. Cyclin-dependent kinase 8
  2. Mediator complex subunit CDK8
  3. Mediator of RNA polymerase II transcription subunit CDK8
  4. Protein kinase K35
Gene Name CDK8
Protein Type Unknown
Biological Properties
General Function Involved in protein kinase activity
Specific Function Component of the Mediator complex, a coactivator involved in regulated gene transcription of nearly all RNA polymerase II-dependent genes. Mediator functions as a bridge to convey information from gene-specific regulatory proteins to the basal RNA polymerase II transcription machinery. Mediator is recruited to promoters by direct interactions with regulatory proteins and serves as a scaffold for the assembly of a functional preinitiation complex with RNA polymerase II and the general transcription factors. Phosphorylates the CTD (C-terminal domain) of the large subunit of RNA polymerase II (RNAp II), which may inhibit the formation of a transcription initiation complex. Phosphorylates CCNH leading to down-regulation of the TFIIH complex and transcriptional repression. Recruited through interaction with MAML1 to hyperphosphorylate the intracellular domain of NOTCH, leading to its degradation
Pathways Not Available
Reactions Not Available
GO Classification
Function
binding
catalytic activity
transferase activity
transferase activity, transferring phosphorus-containing groups
kinase activity
nucleoside binding
purine nucleoside binding
adenyl nucleotide binding
adenyl ribonucleotide binding
atp binding
protein kinase activity
protein serine/threonine kinase activity
Process
phosphorus metabolic process
phosphate metabolic process
metabolic process
cellular metabolic process
protein amino acid phosphorylation
phosphorylation
Cellular Location
  1. Nucleus (Probable)
Gene Properties
Chromosome Location Chromosome:1
Locus 13q12
SNPs CDK8
Gene Sequence
>1395 bp
ATGGACTATGACTTTAAAGTGAAGCTGAGCAGCGAGCGGGAGCGGGTCGAGGACCTGTTT
GAATACGAGGGCTGCAAAGTTGGCCGAGGCACTTATGGTCACGTCTACAAAGCCAAGAGG
AAAGATGGGAAGGATGATAAAGACTATGCTTTAAAACAAATAGAAGGAACTGGGATCTCT
ATGTCGGCATGTAGAGAAATAGCATTACTTCGAGAGCTTAAGCATCCAAACGTCATTTCT
CTTCAAAAGGTGTTTCTGTCTCATGCTGATAGGAAGGTGTGGCTTCTGTTTGACTATGCT
GAACATGACCTCTGGCATATAATCAAGTTTCACAGAGCTTCTAAAGCAAACAAGAAGCCA
GTTCAGTTACCTCGGGGAATGGTGAAGTCACTATTATATCAGATCCTAGATGGTATTCAC
TACCTGCATGCTAACTGGGTGTTGCACAGAGATTTGAAACCTGCTAATATTTTAGTTATG
GGTGAAGGTCCTGAGCGAGGAAGAGTAAAAATTGCTGACATGGGCTTTGCCCGATTATTT
AATTCACCTTTGAAGCCTTTAGCAGATTTGGATCCAGTGGTTGTTACATTCTGGTACCGA
GCCCCTGAACTACTTCTTGGAGCAAGGCATTATACCAAAGCTATTGATATTTGGGCTATA
GGGTGTATATTTGCAGAACTACTAACGTCAGAACCAATATTTCACTGTCGACAAGAGGAC
ATCAAAACTAGTAATCCTTATCACCATGACCAGCTGGACAGAATATTCAATGTAATGGGA
TTTCCTGCAGATAAAGATTGGGAAGATATAAAAAAGATGCCTGAACATTCAACATTAATG
AAAGATTTCAGAAGAAATACGTATACCAACTGCAGCCTTATCAAGTATATGGAAAAACAT
AAAGTTAAACCAGATAGTAAAGCATTCCACTTGCTTCAGAAGCTGCTTACCATGGACCCA
ATAAAGCGAATTACCTCAGAACAGGCTATGCAGGACCCCTATTTCTTAGAAGACCCACTT
CCTACATCAGACGTTTTTGCCGGTTGTCAAATCCCTTACCCAAAACGAGAATTTTTAACG
GAAGAAGAACCTGATGACAAAGGAGACAAAAAGAACCAGCAGCAGCAGCAGGGCAATAAC
CACACTAATGGAACTGGCCACCCAGGGAATCAAGACAGCAGTCACACACAGGGACCCCCG
TTGAAGAAAGTGAGAGTTGTTCCTCCTACCACTACCTCAGGTGGACTTATCATGACCTCA
GACTATCAGCGTTCCAATCCACATGCTGCCTATCCCAACCCTGGACCAAGCACATCACAG
CCGCAGAGCAGCATGGGATACTCAGCTACCTCCCAGCAGCCTCCACAGTACTCACATCAG
ACACATCGGTACTGA
Protein Properties
Number of Residues 464
Molecular Weight 53283.3
Theoretical pI 8.82
Pfam Domain Function
Signals
  • None
Transmembrane Regions
  • None
Protein Sequence
>Cell division protein kinase 8
MDYDFKVKLSSERERVEDLFEYEGCKVGRGTYGHVYKAKRKDGKDDKDYALKQIEGTGIS
MSACREIALLRELKHPNVISLQKVFLSHADRKVWLLFDYAEHDLWHIIKFHRASKANKKP
VQLPRGMVKSLLYQILDGIHYLHANWVLHRDLKPANILVMGEGPERGRVKIADMGFARLF
NSPLKPLADLDPVVVTFWYRAPELLLGARHYTKAIDIWAIGCIFAELLTSEPIFHCRQED
IKTSNPYHHDQLDRIFNVMGFPADKDWEDIKKMPEHSTLMKDFRRNTYTNCSLIKYMEKH
KVKPDSKAFHLLQKLLTMDPIKRITSEQAMQDPYFLEDPLPTSDVFAGCQIPYPKREFLT
EEEPDDKGDKKNQQQQQGNNHTNGTGHPGNQDSSHTQGPPLKKVRVVPPTTTSGGLIMTS
DYQRSNPHAAYPNPGPSTSQPQSSMGYSATSQQPPQYSHQTHRY
GenBank ID Protein 1000491
UniProtKB/Swiss-Prot ID P49336
UniProtKB/Swiss-Prot Entry Name CDK8_HUMAN
PDB IDs Not Available
GenBank Gene ID X85753
GeneCard ID CDK8
GenAtlas ID CDK8
HGNC ID HGNC:1779
References
General References
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  6. Sun X, Zhang Y, Cho H, Rickert P, Lees E, Lane W, Reinberg D: NAT, a human complex containing Srb polypeptides that functions as a negative regulator of activated transcription. Mol Cell. 1998 Aug;2(2):213-22. [PubMed:9734358 ]
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  9. Fryer CJ, White JB, Jones KA: Mastermind recruits CycC:CDK8 to phosphorylate the Notch ICD and coordinate activation with turnover. Mol Cell. 2004 Nov 19;16(4):509-20. [PubMed:15546612 ]
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  11. Zhang X, Krutchinsky A, Fukuda A, Chen W, Yamamura S, Chait BT, Roeder RG: MED1/TRAP220 exists predominantly in a TRAP/ Mediator subpopulation enriched in RNA polymerase II and is required for ER-mediated transcription. Mol Cell. 2005 Jul 1;19(1):89-100. [PubMed:15989967 ]
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