Hydrogen‐Activating Enzymes: Activity Does Not Correlate with Oxygen Sensitivity

Abstract

Surprisingly uninhibited: The inhibition of hydrogenases by oxygen is intensely studied because this is the main obstacle to using these enzymes in biofuel cells. The hydrogenase from Clostridium acetobutylicum (see structure) was found to react surprisingly slowly with O2. The inhibition mechanism was elucidated and the kinetics were quantitatively defined. This is a prerequisite for improving the enzyme further by genetic engineering and for assessing its potential in technological devices. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z704313_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.