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Background: Phosphoserine phosphatase (PSP) is an essential enzyme involved in L-serine biosynthesis. Results: High throughput screen was performed to identify specific PSP inhibitors with activity against intracellular bacteria. Conclusion: Validation of PSP as a drug target would lead to identification of scaffolds with a novel mechanism. Significance: This is the first report demonstrating selective inhibition of M. tuberculosis PSP enzyme.

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