As part of the intermicrovillar adhesion complex/IMAC plays a role in epithelial brush border differentiation, controlling microvilli organization and length. Plays a role in assembly of the complex (PubMed:26812018). May play a role in cellular response to endoplasmic reticulum stress (By similarity). Part of the IMAC/intermicrovillar adhesion complex/intermicrovillar tip-link complex composed of ANKS4B, MYO7B, USH1C, CDHR2 and CDHR5 (PubMed:26812018). Interacts with USH1C; the interaction is direct and is required for ANKS4B localization to the tip of microvilli (PubMed:26812017, PubMed:26812018). Interacts with MYO7B; the interaction is direct (PubMed:26812018). May interact with HSPA5 (By similarity). Localizes at the tip of microvilli (PubMed:26812018). May associate with endoplasmic reticulum membranes (By similarity). Expressed in kidney and small intestine. Extended C-terminus.