Методы моделирования наднуклеосомной структуры хроматина и расчета спектров малоуглового рассеяния нейтронов
![Диссертация: Методы моделирования наднуклеосомной структуры хроматина и расчета спектров малоуглового рассеяния нейтронов](https://westud.ru/work/2530125/cover.png)
Диссертация
Таким образом, разработка методов молекулярного моделирования наднуклеосомной структуры хроматина геномного размера (порядка 106 нуклеосом или Ю10 атомов) и соответствующих методов расчёта спектров МУРН, применимых для систем такого размера, является актуальной биофизической задачей. Её решение позволит рассчитывать спектры МУРН и другие свойства моделей наднуклеосомной структуры хроматина для… Читать ещё >
Содержание
- Список сокращений
- 1. Обзор литературы
- 1. 1. Структура нуклеосомы
- 1. 2. Компактизация хроматина
- 1. 3. Структура нити хроматина
- 1. 4. Структура хроматина на уровне ядра
- 1. 5. Малоугловое рассеяние нейтронов
- 2. Методы
- 2. 1. Геометрическая модель нуклеосомы
- 2. 2. Алгоритм анализа СС-состава сайтов образования нуклеосом
- 2. 2. 1. Определение последовательностей сайтов образования нуклеосом
- 2. 2. 2. Биномиальный тест .4^
- 2. 2. 3. и-тест Манна — Уитни
- 2. 3. Геометрическая модель наднуклеосомной структуры
- 2. 3. 1. Параметризация межнуклеосомного интерфейса
- 2. 3. 2. Режим одноцепочечной генерации наднуклеосомной структуры
- 2. 3. 2. 1. Подрежим локально-регулярной генерации
- 2. 3. 3. Режим фрактальной генерации
- 2. 4. Полишаровая физическая модель нуклеосомы
- 2. 5. Полноатомная физическая модель нуклеосомы
- 2. 5. 1. Построение списка атомов нуклеосомы
- 2. 5. 1. 1. Регуляризированная модель нуклеосомы
- 2. 5. 2. Построение списка остатков нуклеосомы
- 2. 5. 3. Монте-Карло моделирование распределения парных расстояний и двумерная гистограмма
- 2. 5. 4. Параметризация плотности длин рассеяния
- 2. 5. 5. Одномерная гистограмма и расчёт спектров малоуглового рассеяния нейтронов
- 2. 5. 1. Построение списка атомов нуклеосомы
- 2. 6. Модель однородного шара в методе Монте-Карло
- 3. Результаты и обсуждение
- 3. 1. Анализ геометрии мононуклеосомных структур из банка РБВ
- 3. 2. Анализ СС-состава сайтов образования нуклеосом
- 3. 3. Расчёты спектров малоуглового рассеяния нейтронов с использованием полишаровой модели нуклеосомы
- 3. 3. 1. Расчёты с помощью формулы Дебая
- 3. 3. 1. 1. Мононуклеосома
- 3. 3. 1. 2. Наднуклеосомные структуры
- 3. 3. 1. 3. Анализ применения формулы Дебая
- 3. 3. 2. Переход к методу Монте-Карло
- 3. 3. 2. 1. Мононуклеосома
- 3. 3. 2. 2. Наднуклеосомные структуры
- 3. 3. 2. 3. Анализ применения метода Монте-Карло
- 3. 3. 1. Расчёты с помощью формулы Дебая
- 3. 4. Расчёты спектров малоуглового рассеяния нейтронов с использованием полноатомной модели нуклеосомы
- 3. 4. 1. Мононуклеосома
- 3. 4. 2. Наднуклеосомные структуры, полученные в режиме одноцепочечной генерации
- 3. 4. 2. 1. Наднуклеосомные структуры, полученные в подрежиме локально-регулярной генерации
- 3. 4. 3. Наднуклеосомные структуры, полученные в режиме фрактальной генерации
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