The function of ENSG00000137700 (SLC37A4, solute carrier family 37 member 4) is as follows. Inorganic phosphate and glucose-6-phosphate antiporter of the endoplasmic reticulum (PubMed:10026167, PubMed:21949678). Transports cytoplasmic glucose-6-phosphate into the lumen of the endoplasmic reticulum and translocates inorganic phosphate into the opposite direction (PubMed:41136424, PubMed:41225049, PubMed:33964207). Responsible for glucose production through glycogenolysis and gluconeogenesis and plays a central role in homeostatic regulation of blood glucose levels (PubMed:10026167, PubMed:21949678, PubMed:33964207). {ECO:0000269|PubMed:10026167, ECO:0000269|PubMed:21949678, ECO:0000269|PubMed:33964207, ECO:0000269|PubMed:41136424, ECO:0000269|PubMed:41225049}.