The Kinetics of Hydrolysis of ATP by Apyrase A from Solanum tuberosumстатья
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Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 февраля 2021 г.
Аннотация:The kinetics of the hydrolysis of ATP by apyrase A from the Solanum tuberosum potato is studied at a pH of 6.5 and 25°C by the bioluminescent method. Km = 33 μM and V = 0.37 μM/s are determined for ATP. It is shown that the hydrolysis of ATP proceeds in two stages. The fast and slow stages of the reaction are described by pseudo-first-order exponents. According to the hypothesis proposed, the intermediate complex of apyrase with ADP which is formed at the fast stage of the reaction possesses catalytic activity in the hydrolysis reaction of ATP but it is lower compared to free apyrase. This complex hydrolyzes ATP at the slow stage of the reaction.