PROPERTIES OF THE TUNGSTEN-SUBSTITUTED MOLYBDENUM FORMYLMETHANOFURAN DEHYDROGENASE FROM METHANOBACTERIUM-WOLFEI

被引:43
作者
SCHMITZ, RA
ALBRACHT, SPJ
THAUER, RK
机构
[1] MAX PLANCK INST TERRESTR MIKROBIOL,MARBURG,GERMANY
[2] UNIV AMSTERDAM,EC SLATER INST BIOCHEM RES,1018 NL AMSTERDAM,NETHERLANDS
关键词
FORMYLMETHANOFURAN DEHYDROGENASE; TUNGSTEN-SUBSTITUTED MOLYBDENUM PROTEIN; TUNGSTEN EPR SIGNAL; METHANOGENIC ARCHAEA;
D O I
10.1016/0014-5793(92)80743-Z
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
In Methanobacterium wolfei two formylmethanofuran dehydrogenases are present. one of which is a molybdenum- and the other a tungsten enzyme. We report here that also the 'molybdenum' enzyme contained tungsten when the archaeon was grown on molybdenum-deprived medium supplemented with tungstate (1-mu-M). Unexpectedly the tungsten-substituted molybdenum enzyme was catalytically active and displayed a rhombic EPR signal which was attributed to tungsten by the characteristic W-183 splitting.
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页码:78 / 81
页数:4
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