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Na-induced reversal of the Ca-dependent red-shift of cytochrome a. Is there a hidronium output well in cytochrome c oxidaseстатья
Информация о цитировании статьи получена из
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Дата последнего поиска статьи во внешних источниках: 27 декабря 2018 г.
- Авторы: Mkrtchan H.M., Vygodina T.V., Konstantinov A.A.
- Журнал: Biochemistry international
- Том: 20
- Номер: 1
- Год издания: 1990
- Издательство: Published for the International Union of Biochemistry by Academic Press
- Местоположение издательства: Sydney ; New York, Australia
- Первая страница: 183
- Последняя страница: 190
- DOI: PMID:2158324
- Аннотация: The Ca2(+)-induced red shift of the cytochrome a absorption spectrum is counteracted specifically by Na+ ions, whereas neither K+ nor Li+ do show comparable effect. At the same time Na+ does not reverse the H(+)-induced red shift of cytochrome a 2+. It is suggested that Na+ competes with Ca2+ for binding site(s) within the cytochrome oxidase output proton well communicating the heme a propionate substituent responsible for the Ca2(+)- or H(+)-induced red-shift of cytochrome a (Saari et al. 1980, J. Bioenerget. Biomembr. 12, 325-338) with the c-aqueous phase. The unusual ionic specificity of the well (Ca2+, Na+, proton) may point to H3O+ rather than H+ being the ion involved in proton conduction through the output well of cytochrome oxidase.
- Добавил в систему: Выгодина Татьяна Владимировна