Proton-coupled electron transfer

Article Abstract:

Proton-coupled electron transfer (PCET) is important as a mechanism for charge transfer in many types of systems including materials- and biology-oriented situations. Areas where transfer of an electron and proton is tightly coupled have been reviewed. Model systems that can provide an experimental basis for a test of PCET theory are of interest. In a PCET reaction, the electron and proton may transfer concertedly (ETPT) or consecutively (ET/PT), and for both kinds of transfers rate constants have been found. To evaluate the rate constants dielectric continuum theory is used. Electron donor hydrogen-bonded-interface electron-acceptor systems displaying PCET reactivity have been studied.

United States, Observations, Energy metabolism, Bioenergetics, Molecular dynamics, Electron transport, Protons, Tunneling (Physics)

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Theory of protein folding: the energy landscape perspective

Article Abstract:

Energy landscape theory of protein folding is based on statistical mechanics. It describes a protein's potential surface and assumes that the folding occurs by the organization of a group of structures, not just based on the nature of some of the uniquely defined structural intermediates. The most accurate model of a protein according to this theory is a heteropolymer frustrated as little as possible and having a rough landscape. It would be rather like a funnel and tend toward the native structure. Fast folding experiments and protein structure prediction present special problems.

Analysis, Molecular structure, Protein folding, Chemistry, Physical organic, Physical organic chemistry

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