meso-α, ε-Diaminopimelate D-Dehydrogenase: Sulfhydryl Group Modification
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概要
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meso-α, ε-Diaminopimelate D-dehydrogenase was inhibited by sulfhydryl reagents such as p-chloromercuribenzoate and HgCl2. Two sulfhydryl groups were titrated per molecule in the presence and absence of 6 M guanidine hydrochloride: the enzyme contained one sulfhydryl group per subunit. Modification of the sulfhydryl groups with p-chloromercuribenzoate, 5, 5 -dithiobis(2-nitrobenzoic acid), 4, 4-dithiopyridine, N-ethylmaleimide, and iodoacetic acid was accompanied by a loss of enzymeactivity. However, modification of sulfhydryl groups of the enzyme with cyanide did not affect the activity. Thus, the introduction of bulky or charged substituents to sulfhydryl groups decreased the catalytic activity of the enzyme, but modification of the groups with the small and uncharged group, a cyano group, did not. The sulfhydryl groups did not play an essential role in catalysis.
- 社団法人 日本農芸化学会の論文
著者
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Soda Kenji
Laboratory Of Microbial Biochemistry Institute For Chemical Research Kyoto University
-
Misono Haruo
Laboratory Of Applied Microbiology Department Of Agricultural Chemistry Kochi University
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Nagasaki Susumu
Laboratory of Applied Microbiology, Department of Bioresources Science, Kochi University
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