耐塩性乳酸菌Tetracoccus soyaeにおけるL-Threonine AldolaseおよびL-Threonine Dehydrataseの関与するL-スレオニンの代謝 : 好塩性菌に関する研究第9報 : 耐塩性乳酸菌Tetracoccus soyaeによるアミノ酸の代謝(その4)

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Studies on the pathways for the dissimilation of L-threonine in Tetracoccus soyae UENO et OMATA have been carried out. From the studies it was shown that the organism metabolized L-threonine and converted in into acetaldehyde and glycine, by the catalysis of a pyridoxal 5'-phosphate-dependent L-threonine aldolase. However, the activity of the enzyme was very low. L-Threonine was also metabolized by L-threonine dehydratase and was converted into α-ketobutyric acid and ammonia. L-Threonine dehydratase was shown to be an inducible and biosynthetic type enzyme.In the organism, L-threonine was metabolized in three ways, namely, the pathways catalyzed by L-threonine aldolase, L-threonine dehydratase, and L-threonine dehydrogenase, and the activities of these enzymes were influenced by the culture conditions.
社団法人日本生物工学会の論文
1974-03-25