ArticleFEMS microbiology letters2026
Leptospira glyceraldehyde-3-phosphate dehydrogenase (LiGAPDH): a cell-surface plasminogen binding protein.
Article in FEMS microbiology letters, 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
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is classically recognized as a glycolytic enzyme that catalyzes the conversion of glyceraldehyde 3-phosphate into D-glyceryl 1,3-bisphosphate. However, it also exhibits "moonlighting" functions, serving roles unrelated to metabolism. Notably, this multifunctional protein, which lacks a conventional membrane anchor, is present on the surface of many prokaryotic and eukaryotic cells. In this study, we demonstrate that Leptospira interrogans GAPDH (LiGAPDH) is surface-exposed and interacts with plasminogen. In the presence of the exogenous activator uPA, plasminogen is converted into its active form, plasmin. The LiGAPDH-plasmin complex can degrade fibrinogen (α and β chains) and the 75-kDa form of vitronectin over time. Interestingly, plasmin, when bound to LiGAPDH, completely degrades the C5 α-chain but does not affect C3b. The functional characterization of moonlighting proteins and the identification of host molecules they interact with may offer insights for understanding the mechanisms of invasion, dissemination, and immune evasion employed by pathogenic leptospires.
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