Genealogy of mammalian cysteine proteinase inhibitors
- 28 October 1985
- journal article
- research article
- Published by Wiley in FEBS Letters
- Vol. 191 (2), 221-226
- https://doi.org/10.1016/0014-5793(85)80012-0
Abstract
A model for the evolution of mammalian cysteine proteinase inhibitors has been constructed on the basis of sequence homology. This model suggests that the diversity of cysteine proteinase inhibitors has evolved from two ancestral units forming the building blocks of stefin and cystatin. Gene triplication of the archetypal inhibitor generated the kininogen heavy chain which contains three cystatin-like copies. Hence, the superfamily of mammalian cysteine proteinase inhibitors is constituted by at least three distinct families, with stefin, cystatin and kininogen as their prototypes.Keywords
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