NAPSA

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Napsin-A is an aspartic proteinase that is encoded in humans by the NAPSA gene.[1] The name napsin comes from novel aspartic proteinase of the pepsin family.[2]

The activation peptide of an aspartic proteinase acts as an inhibitor of the active site. These peptide segments, or pro-parts, are deemed important for correct folding, targeting, and control of the activation of aspartic proteinase zymogens. The pronapsin A gene is expressed predominantly in lung and kidney. Its translation product is predicted to be a fully functional, glycosylated aspartic proteinase precursor containing an RGD motif and an additional 18 residues at its C-terminus.[1]

Utility

Detection of NAPSA gene expression can be used to distinguish adenocarcinomas from other forms of lung cancer.[3]

References

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  1. ^ a b Page Module:Citation/CS1/styles.css has no content."Entrez Gene: NAPSA napsin A aspartic peptidase".
  2. ^ Page Module:Citation/CS1/styles.css has no content.Tatnell PJ, Powell DJ, Hill J, Smith TS, Tew DG, Kay J (11 December 1998). "Napsins: new human aspartic proteinases". FEBS Letters. 441 (1): 43–48. doi:10.1016/s0014-5793(98)01522-1. PMID 9877162. S2CID 27656626.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Ueno T, Linder S, Elmberger G (2004). "Aspartic proteinase napsin is a useful marker for diagnosis of primary lung adenocarcinoma". Br. J. Cancer. 88 (8): 1229–33. doi:10.1038/sj.bjc.6600879. PMC 2747556. PMID 12698189.

Further reading

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