Effects of acetylene on hydrogenases from the sulfate reducing and methanogenic bacteria.
The effect of acetylene on the activity of the three types of hydrogenase from the anaerobic sulfate reducing bacteria has been investigated. The (Fe) hydrogenase is resistant to inhibition by acetylene while the nickel-containing hydrogenases are inhibited by acetylene with the (NiFe) hydrogenase being 10-50 fold more sensitive than the (NiFeSe) hydrogenase. In addition the Ni(III) EPR signal (g approximately 2.3) of the "as isolated" (NiFe) hydrogenase was significantly decreased in intensity upon exposure to acetylene.
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Department of Biochemistry, School of Chemical Sciences, University of Georgia, Athens 30602.
Woo
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DerVartanian
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Le Gall
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Peck
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D000114:Acetylene / Q000494:pharmacology*; D003901:Desulfovibrio / Q000187:drug effects / Q000201:enzymology*; D004578:Electron Spin Resonance Spectroscopy; D019605:Euryarchaeota / Q000187:drug effects / Q000201:enzymology*; D006864:Hydrogenase / Q000037:antagonists & inhibitors / Q000378:metabolism*
C043296:nickel-iron hydrogenase; C058560:nickel-iron-selenium hydrogenase; D006864:Hydrogenase; D000114:Acetylene