SPECTRA PROPERTIES OF RAT LIVER MITOCHONDRIAL CHOLINE DEHYDROGENASE  

SPECTRA PROPERTIES OF RAT LIVER MITOCHONDRIAL CHOLINE DEHYDROGENASE

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作  者:裘之华 林其谁 

机构地区:[1]Shanghai Institute of Biochemistry, Academia Sinica, Shanghai 200031, PRC

出  处:《Science China Chemistry》1990年第8期955-963,共9页中国科学(化学英文版)

基  金:Project supported by the National Natural Science Foundation of China.

摘  要:Choline dehydrogenase contains the prosthetic group FAD, non-haem iron and acid labile sulfur. However, the absorption spectra of the purified enzyme do not change after adding substrate. The reduced absorption spectra of choline dehydrogenase can only be determined after the addition of dithionite. Those choline dehydrogenases situated in the mitochondrial inner membrane can be reduced by substrate and exist in the reduced state. When cholate was used to solubilize the substrate-reduced choline dehydrogenase, the reduced spectra will gradually disappear. However, if solubilization is carried out under anaerobic conditions, the reduced spectra can be retained, suggesting that the solubilized choline dehydrogenase can use oxygen as an acceptor.Choline dehydrogenase contains the prosthetic group FAD, non-haem iron and acid labile sulfur. However, the absorption spectra of the purified enzyme do not change after adding substrate. The reduced absorption spectra of choline dehydrogenase can only be determined after the addition of dithionite. Those choline dehydrogenases situated in the mitochondrial inner membrane can be reduced by substrate and exist in the reduced state. When cholate was used to solubilize the substrate-reduced choline dehydrogenase, the reduced spectra will gradually disappear. However, if solubilization is carried out under anaerobic conditions, the reduced spectra can be retained, suggesting that the solubilized choline dehydrogenase can use oxygen as an acceptor.

关 键 词:mitochondria CHOLINE DEHYDROGENASE FLAVIN ADENINE dinucleotide(FAD) 

分 类 号:O6[理学—化学]

 

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