Literature DB >> 8484771

Nitric oxide-regulated endogenous ADP-ribosylation of rod outer segment proteins.

N Pozdnyakov1, A Lloyd, V N Reddy, A Sitaramayya.   

Abstract

Both membrane and cytosolic fractions of retinal rod outer segments contain ADP-ribosylases that modify proteins in the respective fractions. Nitroprusside and endogenously produced NO regulate the activities of these ADP-ribosylases. The ADP-ribosylation of the membrane proteins of molecular weight 116K, 66K and 46K is inhibited by NO and nitroprusside, while that of the 38K cytosolic protein and the 39K membrane-associated protein is activated. The 39K protein is identified as the alpha-subunit of G-protein. The ADP-ribosylation of this protein is activated 6 to 11-fold by NO suggesting that NO may play a significant role in modulating the activity of G-protein in visual transduction.

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Year:  1993        PMID： 8484771     DOI： 10.1006/bbrc.1993.1459

Source DB:  PubMed          Journal:  Biochem Biophys Res Commun        ISSN： 0006-291X            Impact factor:   3.575


  11 in total

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