Sensory Rhodopsin I and Sensory Rhodopsin II Form Trimers of Dimers in Complex with their Cognate Transducers

Orekhov, P.; Bothe, A.; Steinhoff, H.; V, S.K.; Raunser, S.; Fotiadis, D.; Schlesinger, R.; Klare; Johann P, M.E.

Авторы: Philipp Orekhov, Arne Bothe, Heinz-Jurgen Steinhoff, Shaitan Konstantin V., Stefan Raunser, Dimitrios Fotiadis, Ramona Schlesinger, Klare and Martin Engelhard Johann P.
Журнал: Photochemistry and Photobiology
Том: 93
Год издания: 2017
Издательство: American Society for Photobiology
Местоположение издательства: United States
Первая страница: 796
Последняя страница: 804
DOI: 10.1111/php.12763
Аннотация: Archaeal photoreceptors consist of sensory rhodopsins in complex with their cognate transducers. After light excitation, a twocomponent signaling chain is activated, which is homologous to the chemotactic signaling cascades in enterobacteria. The latter system has been studied in detail. From structural and functional studies, a picture emerges which includes stable signaling complexes, which assemble to receptor arrays displaying hexagonal structural elements. At this higher order structural level, signal amplification and sensory adaptation occur. Here, we describe electron microscopy data, which show that also the archaeal phototaxis receptors sensory rhodopsin I and II in complex with their cognate transducers can form hexagonal lattices even in the presence of a detergent. This result could be confirmed by molecular dynamics calculations, which revealed similar structural elements. Calculations of the global modes of motion displayed one mode, which resembles the “U”-”V” transition of the NpSRII:NpHtrII complex, which was previously argued to represent a functionally relevant global conformational change accompanying the activation process [Ishchenko et al. (2013) J. Photochem. Photobiol. B 123, 55–58]. A model of cooperativity at the transmembrane level is discussed
Добавил в систему: Шайтан Константин Вольдемарович

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ИНХС РАН

Sensory Rhodopsin I and Sensory Rhodopsin II Form Trimers of Dimers in Complex with their Cognate Transducersстатья

Прикрепленные файлы