Исследование структурно-функциональных свойств люменальных белков PSBO и САН3 фотосистемы 2 растений
Диссертация
Отличительной чертой белков PsbO и СаЬЗ является наличие дисульфидной связи. Исходя из современных знаний о структуре ФС 2, это единственные белки этого комплекса, имеющие дисульфиды. В данной работе показано, что дисульфидная связь СаЬЗ абсолютно необходима для активности фермента. Инактивация фермента в результате восстановления этой связи полностью обратима. Вопрос о необходимости дисульфидной… Читать ещё >
Содержание
- ГЛАВА 1. ОБЗОР ЛИТЕРАТУРЫ
- 1. 1. Структурно-функциональная организация фотосистемы
- 1. 2. Белки водоокисляющего комплекса фотосистемы
- 1. 2. 1. Белки PsbP и PsbQ высших растений и зеленых водорослей
- 1. 2. 2. Белки PsbU и PsbV красных водорослей, цианобактерий и зеленых оксифотобактерий
- 1. 2. 3. Белки цианобактерий, гомологичные PsbP и PsbQ эукариот
- 1. 2. 4. Белок красных водорослей, гомологичный PsbP эукариот
- 1. 3. Белок PsbO
- 1. 3. 1. Структура PsbO
- 1. 3. 2. Взаимодействие PsbO с фотосинтетической мембраной
- 1. 3. 3. Фуикция PsbO
- 1. 4. Карбоангидразная активность, ассоциированная с фотосистемой
- 1. 5. Карбоангидраза Cah3 одноклеточной зеленой водоросли
- 1. 5. 1. Внутриклеточная локализация
- 1. 5. 2. Функциональное значение.'
- 1. 6. Редокс-регуляция фото синтетических процессов
- ГЛАВА 2. ОБЪЕКТЫ И МЕТОДЫ ИССЛЕДОВАНИЙ
- 2. 1. Экспрессия PsbO в Escherichia coli, выделение и очистка рекомбинантного белка
- 2. 1. 1. Конструирование плазмид для экспрессии PsbO
- 2. 1. 2. Экспрессия рекомбинантных белков
- 2. 1. 3. Выделение и очистка слитных белков trx-Hise-PsbO и trx-Hise-Xa-PsbO
- 2. 1. 4. Разделение слитного белка trx-His6-PsbO
- 2. 1. 5. Разделение слитного белка trx-His6-Xa-PsbO
- 2. 2. Сайт-направленный мутагенез PsbO
- 2. 3. Экспрессия СаЬЗ в Escherichia coli, выделение и очистка рекомбинантного белка
- 2. 3. 1. Конструирование экспрессионного вектора
- 2. 3. 2. Экспрессия и очистка СаЬЗ
- 2. 4. Получение препаратов ФС 2 из листьев шпината, выделение и очистка PsbO шпината
- 2. 5. Реконструкция usw-ФС 2 с помощью рекомбинантного PsbO
- 2. 6. Получение препаратов ФС 2 из клеток С. reinhardti
- 2. 7. Реконструкция препаратов ФС 2 из мутанта С. reinhardtii cia с рекомбинантной карбоангидразой саЬЗ
- 2. 8. Исследование взаимодействия ионов Са2+ и Мп2+ с PsbO методом температурной зависимости собственной флуоресценции белка
- 2. 9. Исследование взаимодействия ионов Са и
- 2. 10. Температурная и солевая обработка з?-ФС2 препаратов на свету и в темноте
- 2. 11. Электрофорез в градиенте мочевины
- 2. 12. Расчет плотности межмолекулярных контактов в молекуле PsbO
- 2. 13. Электрофорез и иммуноблоттинг
- 2. 14. Определение концентрации белка
- 2. 15. Определение концентрации хлорофилла
- 2. 16. Определение карбоангидразной активности
- 2. 17. N-концевое секвенирование и масс-спектрометрия
- 3. 1. Экспрессия шпинатного PsbO в Escherichia coli, разработка методики выделения и очистки рекомбинантного белка
- 3. 1. 1. Экспрессия PsbO в векторных плазмидах рЕТ28 и рЕТ
- 3. 1. 2. Выделение и очистка рекомбинантного PsbO, экспрессированного в векторной системе рЕТ
- 3. 1. 3. Замена последовательности сайта узнавания энтерокиназы в экспрессионном векторе pET32-PsbO на последовательность сайта узнавания фактора Ха
- 3. 1. 4. Экспрессия PsbO в векторной плазмиде pET32-Xa-PsbO, выделение и очистка рекомбинантного белка
- 3. 1. 5. Исследование структурно-функциональных свойств рекомбинантного PsbO
- 3. 2. Экспрессия карбоангидразы СаЬЗ в Escherichia coli, разработка методики выделения и очистки рекомбинантного белка
- 3. 3. Изучение влияния рН на конформацию PsbO in vitro и на способность белка взаимодействовать с ионами кальция и марганца
- 3. 3. 1. Исследование взаимодействия ионов кальция и марганца с PsbO методом температурной зависимости собственной флуоресценции белка
- 3. 3. 2. Исследование взаимодействия ионов кальция и марганца с PsbO и рН-ипдуцируемых конформационных переходов
- 3. 4. Влияние освещения на экстракцию PsbO и ионов марганца из препаратов ФС
- 3. 5. Сайт-направленный мутагенез аминокислотных остатков PsbO, предположительно ответственных за рН-индуцируемые конформациопные изменения белка
- 3. 6. Реконструкция препаратов ФС 2 из мутанта С. reinhardtii cia с рекомбинантной карбоангидразой СаЬЗ
- 3. 6. 1. Влияние рекомбинантной карбоангидразы СаЬЗ на скорость выделения кислорода у препаратов ФС 2 из мутанта cia
- 3. 6. 2. Влияние рекомбинантной карбоангидразы СаЬЗ на фотоиндуцируемые изменения выхода флуоресценции хлорофилла ФС 2 мутанта cia
- 3. 6. 3. Связывание СаЬЗ с комплексами ФС 2 из мутанта
- 3. 7. Исследование влияния окислителей и восстановителей сульфгидрильных групп на структуру и функцию белков СаЬЗ и PsbO
- 3. 7. 1. Влияние окислителей и восстановителей сульфгидрильных групп на активность СаЬЗ
- 3. 7. 2. Влияние дисульфидной связи на стабильность структуры PsbO
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