Biology:JunD

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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

Transcription factor JunD is a protein that in humans is encoded by the JUND gene.[1][2]

Function

The protein encoded by this intronless gene is a member of the JUN family, and a functional component of the AP1 transcription factor complex. It has been proposed to protect cells from p53-dependent senescence and apoptosis. Alternate translation initiation site usage results in the production of different isoforms.[3]

ΔJunD

The dominant negative mutant variant of JunD, known as ΔJunD or Delta JunD, is a potent antagonist of the ΔFosB transcript, as well as other forms of AP-1-mediated transcriptional activity.[4][5][6] In the nucleus accumbens, ΔJunD directly opposes many of the neurological changes that occur in addiction (i.e., those induced by ΔFosB).[5][6] ΔFosB inhibitors (drugs that oppose its action) may be an effective treatment for addiction and addictive disorders.[7] Being an unnatural genetic variant, deltaJunD has not been observed in humans.

Interactions

JunD has been shown to interact with ATF3,[8] MEN1,[9] DNA damage-inducible transcript 3[10] and BRCA1.[11]

See also

  • AP-1 (transcription factor)

References

  1. "Isolation of human cDNA clones of jun-related genes, jun-B and jun-D". Nucleic Acids Res. 18 (10): 3047–8. July 1990. doi:10.1093/nar/18.10.3047. PMID 2112242. 
  2. "Structure and function of human jun-D". Oncogene 6 (4): 561–6. June 1991. PMID 1903194. 
  3. "Entrez Gene: JUND jun D proto-oncogene". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=3727. 
  4. "Neural mechanisms of addiction: the role of reward-related learning and memory". Annu. Rev. Neurosci. 29: 565–98. 2006. doi:10.1146/annurev.neuro.29.051605.113009. PMID 16776597. 
  5. 5.0 5.1 "Transcriptional and epigenetic mechanisms of addiction". Nat. Rev. Neurosci. 12 (11): 623–37. November 2011. doi:10.1038/nrn3111. PMID 21989194. "ΔFosB has been linked directly to several addiction-related behaviors ... Importantly, genetic or viral overexpression of ΔJunD, a dominant negative mutant of JunD which antagonizes ΔFosB- and other AP-1-mediated transcriptional activity, in the NAc or OFC blocks these key effects of drug exposure14,22–24. This indicates that ΔFosB is both necessary and sufficient for many of the changes wrought in the brain by chronic drug exposure. ΔFosB is also induced in D1-type NAc MSNs by chronic consumption of several natural rewards, including sucrose, high fat food, sex, wheel running, where it promotes that consumption14,26–30. This implicates ΔFosB in the regulation of natural rewards under normal conditions and perhaps during pathological addictive-like states.". 
  6. 6.0 6.1 "ΔFosB in the nucleus accumbens is critical for reinforcing effects of sexual reward". Genes Brain Behav. 9 (7): 831–40. October 2010. doi:10.1111/j.1601-183X.2010.00621.x. PMID 20618447. 
  7. "Chapter 15: Reinforcement and addictive disorders". Molecular Neuropharmacology: A Foundation for Clinical Neuroscience (2nd ed.). New York: McGraw-Hill Medical. 2009. pp. 384–385. ISBN 9780071481274. 
  8. "Activating transcription factor-3 stimulates 3',5'-cyclic adenosine monophosphate-dependent gene expression". Mol. Endocrinol. 8 (1): 59–68. January 1994. doi:10.1210/mend.8.1.8152431. PMID 8152431. 
  9. "Menin interacts with the AP1 transcription factor JunD and represses JunD-activated transcription". Cell 96 (1): 143–52. January 1999. doi:10.1016/S0092-8674(00)80967-8. PMID 9989505. 
  10. "CHOP enhancement of gene transcription by interactions with Jun/Fos AP-1 complex proteins". Mol. Cell. Biol. 19 (11): 7589–99. November 1999. doi:10.1128/MCB.19.11.7589. PMID 10523647. 
  11. "JunB potentiates function of BRCA1 activation domain 1 (AD1) through a coiled-coil-mediated interaction". Genes Dev. 16 (12): 1509–17. June 2002. doi:10.1101/gad.995502. PMID 12080089. 

Further reading

External links


This article incorporates text from the United States National Library of Medicine, which is in the public domain.