Proteolipid protein 2 (PLP2)

Proteolipid protein 2 (PLP2) is an integral multi-pass membrane protein primarily localized to the endoplasmic reticulum of colonic epithelial cells, enriched especially in the colonic mucosa. It can multimerize, contains a MARVEL domain (often found in proteins involved in membrane apposition), and is proposed to function as an ion channel. PLP2 may play a role in cell differentiation within the intestinal epithelium, apoptosis, autophagy, inflammation, and other cellular processes. Increased PLP2 expression has been observed in several cancers and is associated with disease progression, particularly in high-grade gliomas where it serves as a prognostic marker. A promoter polymorphism may be linked to X-linked cognitive disability, and the gene has a pseudogene on chromosome 5. No approved pharmaceuticals are described as direct interactors, though its manipulation by genetic or pharmacological means has shown effects on cell death and tumor growth in research models.

Other names

A4A4LSBA4 differentiation-dependent proteindifferentiation-dependent protein A4intestinal membrane A4 proteinproteolipid protein 2 (colonic epithelium-enriched)MGC126187

No approved drugs targeting PLP2 directly; for research, knockdown increases ER stress-induced apoptosis and autophagy.