Studies on hydrogenase
نویسندگان
چکیده
منابع مشابه
Studies on hydrogenase
Hydrogenases are microbial enzymes which catalyze uptake and production of H(2). Hydrogenases are classified into 10 classes based on the electron carrier specificity, or into 3 families, [NiFe]-family (including [NiFeSe]-subfamily), [FeFe]-family and [Fe]-family, based on the metal composition of the active site. H(2) is heterolytically cleaved on the enzyme (E) to produce EH(a)H(b), where H(a...
متن کاملReview Studies on hydrogenase
Hydrogenases are microbial enzymes which catalyze uptake and production of H2. Hydrogenases are classified into 10 classes based on the electron carrier specificity, or into 3 families, [NiFe]-family (including [NiFeSe]-subfamily), [FeFe]-family and [Fe]-family, based on the metal composition of the active site. H2 is heterolytically cleaved on the enzyme (E) to produce EHaHb, where Ha and Hb h...
متن کاملDirect electrochemical studies of hydrogenase and CO dehydrogenase.
The reduction potentials of two relatively high-molecular-mass enzymes were determined directly at an edge pyrolytic graphite electrode by using square-wave voltammetry. The equilibrium reduction potential versus standard hydrogen electrode was determined for Clostridium pasteurianum hydrogenase I (E'0 = -377 +/- 10 mV; molecular mass 60 kDa) and Rhodospirillum rubrum carbon monoxide dehydrogen...
متن کاملInfrared studies on the interaction of carbon monoxide with divalent nickel in hydrogenase from Chromatium vinosum.
Infrared spectra of a carbon monoxy-bound form of the EPR silent Ni(II) species of hydrogenase isolated from Chromatium vinosum are presented. These spectra show a band at 2060 cm-1 due to v(CO) for a metal-CO complex. This absorbance shifts to 2017 cm-1 upon exposure of the enzyme to 13CO. This band is attributed to v(CO) from a Ni(II)-CO species. It is shown that the CO on this species is pho...
متن کاملAction of Inhibitors on Hydrogenase in Azotobacter
The inhibitors usually associated with the activity of the cytochrome oxidase system-cyanide and carbon monoxide-are also effective in reducing the oxidation of H(2) by intact cells of Azotobacter vinelandii. The hydrogenase system is more sensitive to CO than is the respiratory system. Oxidation of a carbon source and of hydrogen by Azotobacter cells is inhibited in a quantitatively different ...
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ژورنال
عنوان ژورنال: Proceedings of the Japan Academy, Series B
سال: 2013
ISSN: 0386-2208,1349-2896
DOI: 10.2183/pjab.89.16