Описание: Using a novel approach that combines high temporal resolution of the laser T-jump technique with unique sets of fluorescent probes, this study unveils previously unresolved DNA dynamics during search and recognition by an architectural DNA bending protein and two DNA damage recognition proteins. Many cellular processes involve special proteins that bind to specific DNA sites with high affinity. How these proteins recognize their sites while rapidly searching amidst ~3 billion nonspecific sites in genomic DNA remains an outstanding puzzle. Structural studies show that proteins severely deform DNA at specific sites and indicate that DNA deformability is a key factor in site-specific recognition. However, the dynamics of DNA deformations have been difficult to capture, thus obscuring our understanding of recognition mechanisms. The experiments presented in this thesis uncover, for the first time, rapid (~100-500 microseconds) DNA unwinding/bending attributed to nonspecific interrogation, prior to slower (~5-50 milliseconds) DNA kinking/bending/nucleotide-flipping during recognition. These results help illuminate how a searching protein interrogates DNA deformability and eventually “stumbles” upon its target site. Submillisecond interrogation may promote preferential stalling of the rapidly scanning protein at cognate sites, thus enabling site-recognition. Such multi-step search-interrogation-recognition processes through dynamic conformational changes may well be common to the recognition mechanisms for diverse DNA-binding proteins.
Автор: Martino Bolognesi; Guido di Prisco; Cinzia Verde Название: Dioxygen Binding and Sensing Proteins ISBN: 8847015634 ISBN-13(EAN): 9788847015630 Издательство: Springer Рейтинг: Цена: 30606.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book is dedicated to Jonathan and Bea Wittenberg, giants in the field of haeme protein research. It provides the latest achievements and information in the structure, physiology, and evolution applied on dioxygen-binding and sensing proteins.
Автор: J. Robin Harris Название: Cholesterol Binding and Cholesterol Transport Proteins: ISBN: 9400731744 ISBN-13(EAN): 9789400731745 Издательство: Springer Рейтинг: Цена: 36570.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Knowledge of cholesterol and its interaction with protein molecules is of fundamental importance. This books examines the structural and functional aspects of the families of cholesterol-binding and cholesterol transport proteins.
Автор: Permyakov Название: Calcium Binding Proteins ISBN: 0470525843 ISBN-13(EAN): 9780470525845 Издательство: Wiley Рейтинг: Цена: 25019.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Calcium Binding Proteins explains the unique and highly diverse functions of calcium in biology, which are realized by calcium binding proteins. The structures and physical characteristics of these calcium binding proteins are described, as well as their functions and general patterns of their evolution.
Автор: J. Robin Harris Название: Cholesterol Binding and Cholesterol Transport Proteins: ISBN: 9048186218 ISBN-13(EAN): 9789048186211 Издательство: Springer Рейтинг: Цена: 36570.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Knowledge of cholesterol and its interaction with protein molecules is of fundamental importance. This books examines the structural and functional aspects of the families of cholesterol-binding and cholesterol transport proteins.
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