Component of a complex required to localize phosphatidylinositol 4-kinase (PI4K) to the plasma membrane. The complex acts as a regulator of phosphatidylinositol 4-phosphate (PtdIns(4)P) synthesis. In the complex, plays a central role in bridging PI4KA to EFR3B and HYCC1, via direct interactions (PubMed:26571211). {ECO:0000269|PubMed:23229899, ECO:0000269|PubMed:26571211}. This is the function of TTC7B (tetratricopeptide repeat domain 7B, ENSG00000165914).