ArticleNature chemical biology2026
Structural basis for the catalytic mechanism of human lipid phosphate phosphatases.
Article in Nature chemical biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Lipid phosphate phosphatases (LPPs) catalyze the dephosphorylation of a broad range of bioactive lipid phosphates, including lysophosphatidic acid and sphingosine-1-phosphate, playing essential roles in embryonic vasculogenesis, cell differentiation and inflammation. Here we present the cryo-electron microscopic structure of human LPP1 as a tetramer with C4 symmetry. We capture the phosphohistidine intermediate state by using vanadate as a phosphate analog, where vanadate is coordinated by positively charged residues from three conserved motifs (C1, C2 and C3). Structural investigations of LPP1 variants with mutations in two catalytic histidine residues confirm that the histidine in the C2 motif facilitates phosphate bond cleavage. Enzymatic assays validate our structural observations. Additionally, a phosphatidylinositol 4,5-bisphosphate (PIP
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