کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5376962 1389375 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electron transfer between cofactors in protein domains linked by a flexible tether
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Electron transfer between cofactors in protein domains linked by a flexible tether
چکیده انگلیسی
Some key electron-transfer (ET) proteins have domains containing redox cofactors connected by a flexible tether. The relative motion of the domains is essential for reaction because of the strong ET rate dependence on distance. The constrained conformational flexibility produces a kinetic regime intermediate between “unimolecular” and “bimolecular”. We used a simple model for ET coupled to conformational diffusion to explore the structure dependence of the ET kinetics. The model describes the evolution of an initially prepared reduced donor state, and recovers the diffusion and electron tunneling-limited regimes. The restriction of the conformational space imposed by the tether introduces an entropic component to the effective donor-acceptor interaction potential. As such, the tether length may control the transition between the electron tunneling and diffusion-limited regimes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 326, Issue 1, 11 July 2006, Pages 259-269
نویسندگان
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