Synthesis of hydrolysis-resistant pyridoxal 5′-phosphate analogs and their biochemical and X-ray crystallographic characterization with the pyridoxal phosphatase chronophin
A set of phosphonic acid derivatives (1-4) of pyridoxal5'-phosphate (PLP) was synthesized and characterized biochemically using purified murine pyridoxalphosphatase (PDXP), also known as chronophin. The most promising compound 1 displayed primarily competitive PDXP inhibitory activity with an IC50 value of 79μM, which was in the range of the Km of the physiological substrate PLP. We also report the