M. Lockyer

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About

M. Lockyer is a structural biochemist whose work illuminates the molecular machinery of bacterial metabolism, with a particular focus on the riboflavin biosynthesis pathway. Their most influential study, "GTP Cyclohydrolase II Structure and Mechanism" (2005, 64 citations), provided the first detailed structural and mechanistic understanding of the enzyme that catalyzes the committed step in riboflavin (vitamin B2) production. This work revealed how GTP cyclohydrolase II converts GTP into the pyrimidine precursor, a reaction essential for bacterial survival but absent in humans. By solving the enzyme's three-dimensional structure and elucidating its catalytic mechanism, Lockyer established a critical foundation for targeting this pathway in antibiotic development. The significance of this contribution lies in its demonstration that GTP cyclohydrolase II represents a promising "novel" drug target, given its essentiality in pathogens and absence in higher eukaryotes. Lockyer's research continues to inform efforts to design selective inhibitors against bacterial riboflavin synthesis, offering a strategic approach to combat antimicrobial resistance while sparing human cells.