The function of Ensembl gene identifier ENSG00000168890 (TMEM150A, transmembrane protein 150A) is as follows. Regulates localization of phosphatidylinositol 4-kinase (PI4K) to the plasma membrane, possibly by reducing the association of TTC7 (TTC7A or TTC7B) with the PI4K complex (PubMed:25608530). Acts as a regulator of phosphatidylinositol 4-phosphate (PtdIns(4)P) synthesis (PubMed:25608530). May also play a role in fasting-induced catabolism (By similarity). {ECO:0000250|UniProtKB:Q9QZE9, ECO:0000269|PubMed:25608530}.