Bioelectrochemistry III: Charge Separation Across by R. Hedrich, W. Stühmer, B. U. Keller (auth.), G. Milazzo, M.

By R. Hedrich, W. Stühmer, B. U. Keller (auth.), G. Milazzo, M. Blank (eds.)

This e-book comprises aseries of evaluate papers concerning the lectures given on the 3rd direction on Bioelectrochemistry held at Erice in November 1988, within the framework of the overseas institution of Biophysics. the subjects coated by way of this direction, "Charge Separation throughout Biomembranes, " care for the electrochemical facets of a few uncomplicated phenomena in organic structures, akin to delivery of ions, ATP synthesis, formation and upkeep of ionic and protonic gradients. within the first a part of the path a few initial lectures introduce the scholars to the main uncomplicated phenomena and technical facets of membrane bioelectrochemistry. the rest a part of the direction is dedicated to the outline of a chosen staff of membrane-enzyme structures, able to selling, or exploiting, the tactics of separation of electrically charged entities (electrons or ions) around the membrane barrier. those structures are systematically mentioned either from a structural and practical perspective. the trouble of the various uncommon academics who contributed to the direction is geared toward delivering a unifying treatement of the electrogenic platforms working in organic membranes, underlying the basic changes within the molecular mechanisms of cost translocation.

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Extra info for Bioelectrochemistry III: Charge Separation Across Biomembranes

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In ca se of mitochondria the membrane potential is only necessary for the insertion of the positivelycharged targeting sequences into the inner membrane. It is not required for the translocation of the mature protein part [66, 76, 81]. In conclusion, our present knowledge is not sufficient to explain what drives the mature protein moiety of aprecursor across the membrane. Neither is it known, how the unidirectionality of the process is determined. Having no alternative explanation at hand, it was proposed that tight folding of the protein occurring after translocation would be the HARTL 30 indirect driving force for translocation.

HALLBERG, RL. L. HORWICH, Nature (London), 337, 620 (1989). M. HEMMINGSEN, C. M. VAN DER VIES, K. T. P. GEORGOPOULOS, RW. HENDRIX and RJ ELLIS, Nature (London), 333, 330 (1988). L. S. HARDY, Cell, 46, 921 (1986). [95] M. EILERS and G. SCHATZ, Nature (London), 322, 228 (1986). [96] M. EILERS, S. HWANG and G. , 7, 1139 (1988). [97] JE. ROTHMAN and RD. KORNBERG, Nature (London), 322, 209 (1986). HARTL 34 [98] RJ. D. KocH, M. A. CRAIG and R SHEKMAN, Nature (London), 332, 800 (1988). [99] [100] [101] [102] [103] [104] Nature (London), 332, 805 (1988).

Pump currents of the Na+K+ -ATPase 47 6. Transient kinetics of the Na+K+ -ATPase .............................. 50 Bioelectrochemistry 111 Edited by G. Milazzo and M. Blank Plenum Press, New York, 1990 ............... . . . . . . . . . . . .. BAMBERG - FENDLER 1. 37 Introduction Charge translocation in light-driven and ATP-driven ion-pumps has been studied on plan ar lipid membranes. The method consists of the adsorption of membrane fragments containing the ion-pump to a planar lipid film.

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