title: Regulation of adenosine-5'-phosphosulfate sulfotransferase activity by H2S in Lemna minor L.
abstract: When Lemna 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 cycloheximid but not by chloramphenicol. In vitro, S(2-) 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.
authors.affiliation: Pflanzenphysiologisches Institut der Universität Bern, Altenbergrain 21, CH-3013, Bern, Switzerland.
authors.forename: C
authors.initials: C
authors.lastname: Brunold
authors.forename: A
authors.initials: A
authors.lastname: Schmidt