Regulates cell junction organization in epithelial cells. May play a role in the transition from adherens junction to tight junction assembly. May regulate F-actin polymerization required for tight junctional localization dynamics and affect the junctional localization of PARD6B. During podocyte differentiation may negatively regulate activity of FYN and subsequently the abundance of nephrin (By similarity). {ECO:0000250|UniProtKB:Q9JJG6, ECO:0000250|UniProtKB:Q9XSV3}. This is the function of Ensembl gene identifier ENSG00000147027 (TMEM47, transmembrane protein 47).