...In the carboxybiotin-enzyme intermediate, the carboxyl group is bound to the nitrogen atom at position 1 of the biotin ring as shown in the following formula. (6) Pyridoxal phosphate As a phosphate ester of vitamin B6 , it is important as a coenzyme for various enzymes related to amino acid metabolism, including aspartate aminotransferase. As shown in Figure 2, the aldehyde group at position 4 of the pyridine ring forms a Schiff base with the amino group of the amino acid, and various reactions such as amino transfer, decarboxylation, isomerization, and deamination proceed. ... *Some of the terminology that mentions "pyridoxal phosphate" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…なお,カルボキシビオチン‐酵素中間体において,カルボキシル基は次式のようにビオチン環の1位の窒素原子に結合している。(6)ピリドキサルリン酸pyridoxal phosphate ビタミンB6のリン酸エステルとして,アスパルテートアミノ基転移酵素をはじめ,各種のアミノ酸代謝関連酵素の補酵素として重要。ピリジン環の4位のアルデヒド基がアミノ酸のアミノ基と図2のように,シッフ塩基を形成して,アミノ基転移,脱炭酸,異性化,脱アミノなどの各反応が進行する。… ※「pyridoxal phosphate」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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