Zeta-crystallin from guinea pig lens is capable of functioning catalytically as an oxidoreductase.

Journal Article (Journal Article)

zeta-Crystallin, a major taxon-specific protein of the guinea pig lens, has been shown to be distantly related to the alcohol/polyol dehydrogenase family and to specifically bind NADPH. The capacity of zeta-crystallin to function catalytically was investigated in the present study. zeta-Crystallin exhibited an NADPH-dependent oxidoreductase activity with 2,6-dichlorophenolindophenol (DCIP). The NADPH:DCIP oxidoreductase activity of zeta-crystallin exhibits a linear response with increasing protein concentration, and saturation kinetics with NADPH and DCIP. This activity was abolished by heat inactivation and immunoadsorption of the protein. Dicumarol, Cibacron blue, manganese, and sulfhydryl reagents were inhibitory.

Full Text

Duke Authors

Cited Authors

  • Rao, PV; Zigler, JS

Published Date

  • January 1, 1991

Published In

Volume / Issue

  • 284 / 1

Start / End Page

  • 181 - 185

PubMed ID

  • 1989495

International Standard Serial Number (ISSN)

  • 0003-9861

Digital Object Identifier (DOI)

  • 10.1016/0003-9861(91)90281-m


  • eng

Conference Location

  • United States