Mechanisms of methyl-carbon transfer from S-methylcysteine to pectin in Chinese cabbage (Brassica pekinensis Rupr.)
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概要
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In order to learn how the methyl group of S-methylcysteine was metabolized and its carbon was incorporated into the methyl ester of pectin in Chinese cabbage, leaves were fed S-methylcysteine which was labeled in the methyl group with both ^3H and ^<14>C. Incorporation of the radioactive isotopes into S-adenosylmethionine was detected with little reduction in the ^3H^<14>C ratio between the methyl groups. The changes in the ^^3H/^<14>C ratio between the pectin methyl ester recovered from the leaves and the S-methylcysteine fed to them indicate that there are at least two pathways in the transfer of the methyl-carbon from S-methylcysteine to the methyl ester of pectin: one is the intact methyl group transfer, probably through S-adenosylmethionine and the other is carbon transfer after the degradation of the methyl group. Cysteine sulfoxide lyase (EC 4.4.1.4) was found in the leaves and roots in Chinese cabbage and its involvement in the methyl-carbon transfer is discussed.
- 日本植物生理学会の論文
著者
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Ohira Koji
Department Of Agricultural Chemistry Tohoku University
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Ohira Koji
Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University
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Mae Tadahiko
Department of Agricultural Chemistry, Tohoku University
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Mae Tadahiko
Department Of Agricultural Chemistry Tohoku University
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Mae Tadahiko
Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University
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Ohira Koji
Department Of Agricultural Cheimistry Faculty Of Agriculture Tohoku University
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Mae Tadahiko
Department Of Agricultural Chemistry Faculty Of Agriculture
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