منابع مشابه
Models of membrane electrostatics.
Formulas are derived for the electrostatic potential of a charge in or near a membrane modeled as one or more dielectric slabs lying between two semi-infinite dielectrics. One can use these formulas in Monte Carlo codes to compute the distribution of ions near cell membranes more accurately than by using Poisson-Boltzmann theory or its linearized version. Here I use them to discuss the electric...
متن کاملOptimized Baxter model of protein solutions: electrostatics versus adhesion.
A theory is set up of spherical proteins interacting by screened electrostatics and constant adhesion, in which the effective adhesion parameter is optimized by a variational principle for the free energy. An analytical approach to the second virial coefficient is first outlined by balancing the repulsive electrostatics against part of the bare adhesion. A theory similar in spirit is developed ...
متن کاملThe role of electrostatics in proton-conducting membrane protein complexes.
Electrostatic interactions play a key role in the coupling of electron and proton transfer in membrane protein complexes during the conversion of the energy stored in sunlight or reduced substrates into biochemical energy via a transmembrane electrochemical proton potential. Principles of charge stabilization within membrane proteins are reviewed and discussed for photosynthetic reaction center...
متن کاملAnionic lipids and the maintenance of membrane electrostatics in eukaryotes
A wide range of signaling processes occurs at the cell surface through the reversible association of proteins from the cytosol to the plasma membrane. Some low abundant lipids are enriched at the membrane of specific compartments and thereby contribute to the identity of cell organelles by acting as biochemical landmarks. Lipids also influence membrane biophysical properties, which emerge as an...
متن کاملElectrostatics of ions inside the nanopores and trans-membrane channels
– A model of a finite cylindrical ion channel through a phospholipid membrane of width L separating two electrolyte reservoirs is studied. Analytical solution of the Poisson equation is obtained for an arbitrary distribution of ions inside the trans-membrane pore. The solution is asymptotically exact in the limit of large ionic strength of electrolyte on the two sides of membrane. However, even...
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: Biophysical Journal
سال: 1992
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(92)81921-5