Masayo Kotaka

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About

Masayo Kotaka has made significant contributions to structural biochemistry, with a particular focus on enzymes involved in essential metabolic pathways that are absent in humans, making them attractive targets for drug development. Her most-cited work, "GTP Cyclohydrolase II Structure and Mechanism" (2005, 64 citations), elucidates the three-dimensional architecture and catalytic mechanism of this critical enzyme, which catalyzes the first committed step in riboflavin (vitamin B2) biosynthesis. By converting GTP into 2,5-diamino-6-β-ribosyl-4(3H)-pyrimidinone 5′-phosphate, formate, and pyrophosphate, GTP cyclohydrolase II represents a key control point in a pathway vital for microbial survival but entirely absent in higher eukaryotes. Kotaka's structural insights not only advanced fundamental understanding of this enzyme's function but also provided a molecular blueprint for designing selective antimicrobial agents. Her work exemplifies how structural biology can bridge basic mechanistic discovery with translational potential, offering a compelling case study for students interested in the intersection of enzymology, infectious disease, and rational drug design.