TJP1, Tight junction protein ZO-1
Also Known as
ZO1_HUMAN, TJP1, ZO1
TJP1, TJP2, and TJP3 are closely related scaffolding proteins that link tight junction (TJ) transmembrane proteins such as claudins, junctional adhesion molecules, and occludin to the actin cytoskeleton (PubMed:7798316, PubMed:9792688). The tight junction acts to limit movement of substances through the paracellular space and as a boundary between the compositionally distinct apical and basolateral plasma membrane domains of epithelial and endothelial cells. Necessary for lumenogenesis, and particularly efficient epithelial polarization and barrier formation (By similarity). Plays a role in the regulation of cell migration by targeting CDC42BPB to the leading edge of migrating cells (PubMed:21240187). Plays an important role in podosome formation and associated function, thus regulating cell adhesion and matrix remodeling (PubMed:20930113). With TJP2 and TJP3, participates to the junctional retention and stability of the transcription factor DBPA, but is not involved in its shuttling to the nucleus. Homodimer (PubMed:17928286). Forms heterodimers (via the PDZ2 domain) with TJP2 and TJP3 (PubMed:9792688, PubMed:17928286, PubMed:16737969). Interacts with OCLN, CALM, claudins, CGN/cingulin, CXADR, GJA12, GJD3 and UBN1 (PubMed:7798316, PubMed:11734628, PubMed:12023291, PubMed:12154091, PubMed:15183511, PubMed:18823282, PubMed:20200156). Interacts (via ZU5 domain) with CDC42BPB and MYZAP (PubMed:20093627, PubMed:21240187). Interacts (via PDZ domain) with GJA1 (PubMed:18636092). Interacts (via PDZ domains) with ANKRD2 (PubMed:22016770). Interacts with BVES (via the C-terminus cytoplasmic tail) (By similarity). Interacts with HSPA4 and KIRREL1 (By similarity). Interacts with DLL1 (By similarity). Interacts with USP53 (via the C-terminal region) (By similarity). Interacts (via ABR region) with F-actin (PubMed:9792688, PubMed:12354695, PubMed:20930113). Interacts with DNMBP (via C-terminal domain); required for the apical cell-cell junction localization of DNMBP (PubMed:17015620).