Positively regulates hepatic SREBP signaling pathway by modulating the proper localization of SCAP (SREBP cleavage-activating protein) to the endoplasmic reticulum, thereby controlling the level of functional SCAP (PubMed:32111832). Plays a crucial role during embyrogenesis (PubMed:32111832). Interacts with SCAP. Ubiquitously expressed with a slightly higher expression in the liver and kidney. Knockout leads to early embryonic lethality. Belongs to the SPRING family.