Biology:Aladin (protein)

From HandWiki
Short description: Nuclear envelope protein


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

Aladin, also known as adracalin, is a nuclear envelope protein that in humans is encoded by the AAAS gene.[1] It is named after the achalasia–addisonianism–alacrima syndrome (triple A syndrome) which occurs when the gene is mutated.

Function

Aladin is a component of the nuclear pore complex, to which it is attached by nucleoporin NDC1.[2][3] Mutant aladin causes selective failure of nuclear protein import and hypersensitivity to oxidative stress.[4] Mutant aladin also causes decreased nuclear import of aprataxin, a repair protein for single-strand breaks, and DNA ligase I, employed in DNA base excision repair.[4] These decreases in DNA repair proteins may increase the susceptibility of cells to oxidative stress by allowing accumulation of oxidative DNA damages that trigger cell death.

Clinical significance

Mutations in the AAAS gene are responsible for Triple A syndrome (also known as Allgrove Syndrome).[5] Triple-A syndrome is an autosomal recessive neuroendocrinological disease.

Aladin is also employed in specific oocyte meiotic stages, including spindle assembly and spindle positioning.[6] Female mice homozygously null for aladin are sterile.


References

  1. "Mutant WD-repeat protein in triple-A syndrome". Nature Genetics 26 (3): 332–5. November 2000. doi:10.1038/81642. PMID 11062474. 
  2. "The nuclear pore complex protein ALADIN is anchored via NDC1 but not via POM121 and GP210 in the nuclear envelope". Biochemical and Biophysical Research Communications 390 (2): 205–10. December 2009. doi:10.1016/j.bbrc.2009.09.080. PMID 19782045. 
  3. "Tissue-specific expression and subcellular localization of ALADIN, the absence of which causes human triple A syndrome". Experimental & Molecular Medicine 41 (6): 381–6. June 2009. doi:10.3858/emm.2009.41.6.043. PMID 19322026. 
  4. 4.0 4.1 "ALADINI482S causes selective failure of nuclear protein import and hypersensitivity to oxidative stress in triple A syndrome". Proc. Natl. Acad. Sci. U.S.A. 103 (7): 2298–303. February 2006. doi:10.1073/pnas.0505598103. PMID 16467144. Bibcode2006PNAS..103.2298H. 
  5. "Entrez Gene: AAAS achalasia, adrenocortical insufficiency, alacrimia (Allgrove, triple-A)". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=8086. 
  6. "ALADIN is required for the production of fertile mouse oocytes". Mol. Biol. Cell 28 (19): 2470–2478. September 2017. doi:10.1091/mbc.E16-03-0158. PMID 28768824. 

Further reading

External links