Examinations of the Chemical Step in Enzyme Catalysis #MMPMID27498642
Singh P; Islam Z; Kohen A
Methods Enzymol 2016[]; 577 (ä): 287-318 PMID27498642show ga
Advances in computational and experimental methods in enzymology have aided comprehension of enzyme-catalyzed chemical reactions. The main difficulty in comparing computational findings to rate measurements is that the first examines a single energy barrier while the second frequently reflects a combination of many microscopic barriers. We present here intrinsic kinetic isotope effects and their temperature dependence as a useful experimental probe of a single chemical step in a complex kinetic cascade. Computational predictions are tested by this method for two model enzymes: dihydrofolate reductase (DHFR) and thymidylate synthase (TSase). The description highlights the significance of collaboration between experimentalists and theoreticians to develop a better understanding of enzyme-catalyzed chemical conversions.