Lysophosphatidylglycerol phospholipase D (LpgD)

Lysophosphatidylglycerol phospholipase D (LpgD) is a recently characterized enzyme in Staphylococcus aureus that plays a critical role in maintaining membrane homeostasis by managing the levels of lysophosphatidylglycerol (LPG). It functions as a cation-dependent phosphodiesterase that converts 1-acyl-LPG into lysophosphatidic acid (LPA), which is then recycled back into the phosphatidylglycerol (PG) biosynthetic pathway. By preventing the accumulation of LPG, which can destabilize the bacterial membrane at high concentrations, LpgD ensures the integrity and functionality of the cell envelope during infection. Although no clinical drugs currently target LpgD, its essential role in bacterial lipid metabolism and its distinct structural features make it a promising target for the development of novel anti-staphylococcal agents. Research indicates that LpgD belongs to the glycerophosphodiester phosphodiesterase (GDPD) family and utilizes a two-step catalytic mechanism involving a cyclic-LPA intermediate. Inhibiting this enzyme could potentially sensitize S. aureus to host immune defenses or existing antibiotics by compromising its membrane stability.

Other names

LPG phospholipase DLpgD enzymeSAUSA300_1020Glycerophosphodiester phosphodiesterase LpgD

Inhibition of LpgD activity disrupts the recycling of lysophosphatidylglycerol (LPG) into the phosphatidylglycerol (PG) biosynthetic pathway, leading to membrane destabilization and impaired bacterial survival.