Glycosylphosphatidylinositol-specific phospholipase D1 (GPLD1)

Glycosylphosphatidylinositol-specific phospholipase D1 (GPLD1) is a soluble enzyme primarily found in the serum and is responsible for cleaving the inositol phosphate linkage of glycosylphosphatidylinositol (GPI) anchors on eukaryotic plasma membranes, thereby releasing GPI-anchored proteins from the cell surface[1][2][3][5]. This process allows regulation of various cellular processes, including immune signaling, cell–cell communication, and tissue repair[1][5]. GPLD1 activity is linked to systemic metabolic and inflammatory states, and recent studies have shown that increased circulating GPLD1 correlates with improved cognitive function and neurogenesis in animal models, promoting interest in it as a therapeutic target for age-related diseases and cognitive decline[1][5]. However, its broad role in cellular biology poses significant challenges for drug targeting, as excessive or systemic alteration of its activity may lead to adverse effects on immune function or cellular communication[1][5]. The gene encoding GPLD1 is located on human chromosome 6 and is highly conserved among mammals[2][3][4].

Other names

Phosphatidylinositol-glycan-specific phospholipase DPI-G PLDGPI-PLDGPI-specific phospholipase DGlycoprotein phospholipase DGlycosyl-phosphatidylinositol-specific phospholipase DGPIPLDGPIPLDMPIGPLDPIGPLD1PLD

Enzymatic cleavage of GPI anchors to modulate membrane protein localization and function Indirect modification of cell signaling or inflammatory pathways via release of GPI-anchored proteins