Transmembrane protein 150A (TMEM150A)

Transmembrane protein 150A (TMEM150A) is an integral membrane protein localized primarily at the plasma membrane, encoded by the human TMEM150A gene. It belongs to the DRAM family, with six transmembrane domains and both termini oriented to the cytoplasm. TMEM150A contributes substantially to the regulation of phosphoinositide metabolism, where it enables homeostatic control of PI(4,5)P2 levels by modulating the assembly of PI4KIIIα complex components, notably reducing TTC7 association without altering PI4KIIIα localization itself. In epithelial cells, TMEM150A plays a key role in cytokine homeostasis, limiting TLR4-mediated inflammatory responses and possibly regulating autophagic flux, with its deficiency causing increased inflammatory cytokine production (e.g., IL-6, CXCL8, RANTES). TMEM150A is markedly overexpressed in glioblastoma multiforme, correlating with poor patient prognosis and increased immune dysregulation, and is proposed as a promising diagnostic and prognostic biomarker for this cancer type. Its broader roles include autophagy-related regulation, potential interaction with nuclear proteins, and influence over immune and cellular homeostasis. No drugs or targeted ligands are currently defined for TMEM150A, and its therapeutic manipulation remains largely unexplored.

Other names

TMEM150TM6P1FLJ90024TTN1tetonin 1fasting-inducible integral membrane protein TM6P1

Not established due to absence of known pharmacological ligands. Theoretically, antagonists or modulators of TMEM150A could affect PI(4,5)P2 synthesis and downstream cytokine production, impacting inflammatory and cancerous processes.