Golgi pH regulator A (GPR89A)

Golgi pH regulator A (GPR89A) is a voltage-gated anion channel predominantly located in the cisternal and vesicular membranes of the Golgi apparatus. It mediates the conductance of monoatomic anions such as iodide, chloride, bromide, and fluoride, contributing to the acidification of the Golgi lumen and regulation of intracellular pH. GPR89A participates in vital cellular processes including Golgi acidification and lymphocyte development (as a RABL3 effector). It has been identified as a potential therapeutic target for overcoming resistance to drugs such as cisplatin in non-small cell lung cancer and sorafenib in hepatocellular carcinoma, suggesting relevance in cancer drug resistance and disease progression. GPR89A is also linked to certain genetic syndromes, but little is known about its direct druggability or safety profile in therapeutic contexts[1][2][4][6][7][10][11].

Other names

Golgi pH regulator AGPR89AGPHRAGPR89SH120CGI-13UNQ192/PRO218UNQ192Protein GPR89APutative MAPK-activating protein PM01Putative NF-kappa-B-activating protein 90GPHRGPR89B

modulation of drug resistance via regulation of intracellular pH and Golgi function, involvement as downstream effector in signaling pathways (e.g., RABL3), potential modulation of MAPK and NF-kappa-B signaling