Lysosomal acidic environment

The **lysosomal acidic environment** is a defining feature of lysosomes—organelles specialized for intracellular degradation and recycling. Maintained by membrane proton pumps (especially V-ATPase), this acidic pH (~4.5–5.0) ensures the proper activity of over 60 different hydrolases, which break down proteins, nucleic acids, carbohydrates, and lipids[1][3][4][5][6][7]. The acidity protects cells by confining hydrolase activity to the lysosome interior, preventing damage if enzymes leak into the cytosol. Dysfunctional acidification can lead to various diseases, including inherited lysosomal storage disorders and neurodegeneration[2][3][5][6]. While lysosomal pH can be measured and modified, it is not a drug target or receptor; rather, it is a critical physiological condition for lysosomal function.

Other names

Acidic lysosomal lumenlysosomal pHacidic lysosome compartment