Regulation of adenosine 5 phospho sulfate sulfo transferase activity by hydrogen sulfide in lemna minor

Brunold, C.; Schmidt, A.

Planta (Heidelberg) 133(1): 85-88, 1976


ISSN/ISBN: 0032-0935
Accession: 027286037

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When L. minor L. is transferred to an atmosphere with H2S, there is a rapid loss of extractable adenosine-5'-phosphosulfate sulfotransferase activity. The activity is restored within 24 h in an atmosphere without H2S. This restoration of activity is completely inhibited by cycloheximide but not by chloramphenicol. In vitro, S2- up to 5 mM and cysteine, methionine and glutathione up to 50 mM do not inhibit the enzyme. The activities of ATP sulfurylase and O-acetyl-L-serine sulfhydrylase are not affected significantly by H2S. The physiological significance of the regulation of adenosine-5'-phosphosulfate sulfotransferase is discussed.