Molecular Mechanism of Light-driven Ion Pumps
نویسندگان
چکیده
منابع مشابه
Förster mechanism of electron-driven proton pumps.
We examine a simple model of proton pumping through the inner membrane of mitochondria in the living cell. We demonstrate that the pumping process can be described using approaches of condensed matter physics. In the framework of this model, we show that the resonant Förster-type energy exchange due to electron-proton Coulomb interaction can provide a unidirectional flow of protons against an e...
متن کاملA nanomechanical device based on light-driven proton pumps.
In this paper, a hybrid device based on a microcantilever interfaced with bacteriorhodopsin (bR) is constructed. The microcantilever, on which the highly oriented bR film is self-assembled, undergoes controllable and reversible bending when the light-driven proton pump protein, bR, on the microcantilever surface is activated by visible light. Several control experiments are carried out to precl...
متن کاملModeling light-driven proton pumps in artificial photosynthetic reaction centers.
We study a model of a light-induced proton pump in artificial reaction centers. The model contains a molecular triad with four electron states (i.e., one donor state, two photosensitive group states, and one acceptor state) as well as a molecular shuttle having one electron and one proton-binding sites. The shuttle diffuses between the sides of the membrane and translocates protons energeticall...
متن کاملEquilibrium state of ATP-driven ion pumps in relation to physiological ion concentration gradients
Dear Sir: The purpose of this communication is to show that the Ca ion concentration gradient across the sarcoplasmic reticulum membrane of a resting skeletal muscle cell is close to what would be predicted for the equilibrium state of the ATP-driven Ca pump. The Na and K gradients across the plasma membranes of erythrocytes or of a resting squid axon, however, fall far short of the predicted e...
متن کاملMembrane-associated Ion Pumps
From the $Department of Pediatrics/Biochemistry, Vanderbilt University, Nashville, Tennessee 37232, the **Department of Molecular Biology, Vanderbilt University, Nashville, Tennessee 37235, the 11 Veterans Administration Medical Center, Boise, Idaho 83702, the Department of Medicine, University of Washington, Seattle, Washington 98185, and the IIRoswell Park Memorial Institute, Buffalo, New Yor...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Seibutsu Butsuri
سال: 2010
ISSN: 0582-4052,1347-4219
DOI: 10.2142/biophys.50.222