EXTREMELY HIGH-LEVELS OF NADPH IN GUINEA-PIG LENS - CORRELATION WITH ZETA-CRYSTALLIN CONCENTRATION

被引：52

作者：

RAO, PV

ZIGLER, JS

机构：

[1] Laboratory of Mechanisms of Ocular Diseases, National Eye Institute, The National Institutes of Health, Bethesda, MD 20892, Building 6

来源：

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS | 1990年 / 167卷 / 03期

关键词：

D O I：

10.1016/0006-291X(90)90654-6

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Zeta-crystallin, a major "taxon-specific" protein of the guinea pig lens, specifically binds NADPH. Analysis of pyridine nucleotide levels in guinea pig lens revealed values for NADPH approximately 50-fold higher than in other lenses. Indeed to our knowledge the values reported are higher than have been observed in any tissue. A clear correlation exists between NADPH and zeta-crystallin contents of the lens both in normal guinea pigs during development and in a line of guinea pigs with a mutation in the gene for zeta-crystallin. Heterozygotes for this mutation had a 50% reduction in NADPH, while homozygotes have only about 6% of the normal level. NADP+ levels were also markedly elevated suggesting that redox cycling of the NADPH is occurring. © 1990.

引用

页码：1221 / 1228

页数：8

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