Download MendeleyCryo-EM structure of human lipid phosphate phosphatase 2.
Wang, W., Xu, Y., Guo, P., Han, H., Han, L.(2026) Structure 34: 955
- PubMed: 42068977 Search on PubMed
- DOI: https://doi.org/10.1016/j.str.2026.04.003
- Primary Citation Related Structures:
21NW - PubMed Abstract:
Lipid phosphate phosphatases (LPPs) dephosphorylate lipid phosphates to regulate signaling and metabolism. Among the three mammalian isoforms, LPP1, LPP2, and LPP3, LPP2 has been strongly associated with cancer, making it a potential therapeutic target. However, the molecular mechanisms underlying its structural organization, substrate recognition, and catalysis remain elusive. Here, we report the cryo-EM structure of human LPP2 (hLPP2). hLPP2 assembles as a homo-tetramer, with phosphatidylcholine bound in the substrate pocket. The tetrameric arrangement provides a structural basis for LPP oligomerization. The wide, open-ended substrate pocket explains the enzyme's broad substrate specificity. Structural comparison with PAP2 family members, including hG6PC1 and ecPgpB, suggests a conserved catalytic mechanism and highlights the regulatory role of residue E159 in stabilizing the catalytic center and phosphate release. Collectively, these findings advance our understanding of the structural basis and enzymatic mechanism of LPPs and may provide insights for the development of novel cancer therapies.
- State Key Laboratory of Metabolism and Regulation in Complex Organisms, TaiKang Center for Life and Medical Sciences, TaiKang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan, Hubei 430071, China; Hubei Province Key Laboratory of Allergy and Immunology, TaiKang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan, Hubei 430071, China.
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