| Literature DB >> 1352880 |
Abstract
Nitric oxide-releasing compounds were shown to activate an ADP-ribosyltransferase activity in the cytosol of Dictyostelium discoideum. The enzyme ADP-ribosylated a cytosolic protein of approximately 41 kDa, p41. Neither cGMP nor GTP and its analogues affected this ADP-ribosylation. p41 differs from other substrates ADP-ribosylated by cholera, pertussis, or diphtheria toxins. Treatment of ADP-ribosylated p41 with snake venom phosphodiesterase released adenosine 5'-monophosphate, indicating a mono-ADP-ribose-protein linkage. This linkage was stable to neutral hydroxylamine but was sensitive to mercury ions and iodomethane, suggesting an attachment to a cysteine residue. Treatment of intact cells with nitric oxide-releasing compounds appeared to stimulate the ADP-ribosylation of p41 and this modification was reversible.Entities:
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Year: 1992 PMID: 1352880 PMCID: PMC49405 DOI: 10.1073/pnas.89.13.5902
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205