AI Article Synopsis
- PCET is a crucial process in energy conversion within biological systems, involving the simultaneous or separate transfer of protons and electrons.
- The review compares biological systems like azurin and alcohol dehydrogenase to model systems involving hydrogen bonds and metal complexes to highlight the role of PCET in electron transfer and bond activation.
- Furthermore, it discusses the generation and transport of amino acid radicals using examples from photosystem II and ribonucleotide reductase, providing clear insights into the principles of PCET in biology.
Article Abstract
Proton-coupled electron transfer (PCET) underpins energy conversion in biology. PCET may occur with the unidirectional or bidirectional transfer of a proton and electron and may proceed synchronously or asynchronously. To illustrate the role of PCET in biology, this review presents complementary biological and model systems that explore PCET in electron transfer (ET) through hydrogen bonds [azurin as compared to donor-acceptor (D-A) hydrogen-bonded networks], the activation of C-H bonds [alcohol dehydrogenase and soybean lipoxygenase (SLO) as compared to Fe(III) metal complexes], and the generation and transport of amino acid radicals [photosystem II (PSII) and ribonucleotide reductase (RNR) as compared to tyrosine-modified photoactive Re(I) and Ru(II) complexes]. In providing these comparisons, the fundamental principles of PCET in biology are illustrated in a tangible way.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4625787 | PMC |
| http://dx.doi.org/10.1146/annurev.biochem.78.080207.092132 | DOI Listing |
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