OCLN (Occludin) is a Protein Coding gene. This gene encodes an integral membrane protein that is required for cytokine-induced regulation of the tight junction paracellular permeability barrier. It belongs to the ELL/occludin family. OCLN is an important component of the tight junction complex, providing apical intercellular connections between adjacent cells in endothelial and epithelial tissue. OCLN, an integral tight junction protein, is one of the key factors for HCV entry into cells. OCLN, a key receptor for HCV, is a candidate target of miR-122; the most abundant hepatic micro RNA. Over-expression of miR-122 can decrease HCV entry into hepatocytes through down-regulation of OCLN. Diseases associated with OCLN include Pseudo-Torch Syndrome 1 and Torch Syndrome.