Biology:MAP3K8

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Short description: Protein-coding gene in the species Homo sapiens


A representation of the 3D structure of the protein myoglobin showing turquoise α-helices.
Generic protein structure example

Mitogen-activated protein kinase kinase kinase 8 is an enzyme that in humans is encoded by the MAP3K8 gene.[1][2][3]

Function

The gene was identified by its oncogenic transforming activity in cells. The encoded protein is a member of the serine/threonine-specific protein kinase family. This kinase can activate ERK1, ERK2 and p38 MAP kinases.[4][5] This kinase was shown to activate IkappaB kinases, and thus induce the nuclear production of NF-kappaB. This kinase was also found to promote the production of TNF-alpha and IL-2 during T lymphocyte activation. Studies of a similar gene in rat suggested the direct involvement of this kinase in the proteolysis of NF-kappaB1, p105 (NFKB1). This gene may also start transcription at a downstream in-frame translation start codon, and thus produce an isoform containing a shorter N-terminus. The shorter isoform has been shown to display weaker transforming activity.[3] In mice, the gene is known as TPL2 and is a tumor-suppressor gene whose absence contributes to the development and progression of cancer.[6] However, it functions in other organs as a oncogene, promoting cancer.[7]

Interactions

MAP3K8 has been shown to interact with AKT1,[8] CHUK,[9] NFKB2,[10] NFKB1,[10][11] C22orf25[12] and TNIP2.[13]

References

  1. "Structure and transforming potential of the human cot oncogene encoding a putative protein kinase". Molecular and Cellular Biology 11 (8): 4088–96. Aug 1991. doi:10.1128/mcb.11.8.4088. PMID 2072910. 
  2. "Expression cDNA cloning of a serine kinase transforming gene". Oncogene 8 (5): 1329–33. May 1993. PMID 8479752. 
  3. 3.0 3.1 "Entrez Gene: MAP3K8 mitogen-activated protein kinase kinase kinase 8". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=1326. 
  4. "Mitogen-activated protein kinases in innate immunity.". Nature Reviews Immunology 13 (9): 679–92. Sep 2013. doi:10.1038/nri3495. PMID 23954936. 
  5. "TLR and TNF-R1 activation of the MKK3/MKK6-p38α axis in macrophages is mediated by TPL-2 kinase.". Biochemical Journal 473 (18): 2845–61. Sep 2016. doi:10.1042/BCJ20160502. PMID 27402796. 
  6. DeCicco-Skinner, Kathleen (2011). "Loss of tumor progression locus 2 (tpl2) enhances tumorigenesis and inflammation in two-stage skin carcinogenesis". Oncogene 30 (4): 389–97. doi:10.1038/onc.2010.447. PMID 20935675. 
  7. DeCicco-Skinner, Kathleen (2011). "Loss of tumor progression locus 2 (tpl2) enhances tumorigenesis and inflammation in two-stage skin carcinogenesis". Oncogene 30 (4): 389–97. doi:10.1038/onc.2010.447. PMID 20935675. 
  8. "Akt-dependent phosphorylation specifically regulates Cot induction of NF-kappa B-dependent transcription". Molecular and Cellular Biology 22 (16): 5962–74. Aug 2002. doi:10.1128/MCB.22.16.5962-5974.2002. PMID 12138205. 
  9. "The proto-oncogene Cot kinase participates in CD3/CD28 induction of NF-kappaB acting through the NF-kappaB-inducing kinase and IkappaB kinases". Immunity 10 (2): 271–80. Feb 1999. doi:10.1016/S1074-7613(00)80027-8. PMID 10072079. 
  10. 10.0 10.1 "A physical and functional map of the human TNF-alpha/NF-kappa B signal transduction pathway". Nature Cell Biology 6 (2): 97–105. Feb 2004. doi:10.1038/ncb1086. PMID 14743216. 
  11. "TPL-2 kinase regulates the proteolysis of the NF-kappaB-inhibitory protein NF-kappaB1 p105". Nature 397 (6717): 363–8. Jan 1999. doi:10.1038/16946. PMID 9950430. Bibcode1999Natur.397..363B. 
  12. "Molecular Interaction Database". http://mint.bio.uniroma2.it/mint/Welcome.do. 
  13. "ABIN-2 forms a ternary complex with TPL-2 and NF-kappa B1 p105 and is essential for TPL-2 protein stability". Molecular and Cellular Biology 24 (12): 5235–48. Jun 2004. doi:10.1128/MCB.24.12.5235-5248.2004. PMID 15169888. 

Further reading