NP_003248.3
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NCBI GenBank Nucleotide #
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
186,966 Da
NCBI Official Full Name
tight junction protein ZO-1 isoform a
NCBI Official Synonym Full Names
tight junction protein 1
NCBI Official Synonym Symbols
NCBI Protein Information
tight junction protein ZO-1
UniProt Protein Name
Tight junction protein ZO-1
UniProt Synonym Protein Names
Tight junction protein 1; Zona occludens protein 1; Zonula occludens protein 1
UniProt Synonym Gene Names
UniProt Entry Name
ZO1_HUMAN
NCBI Summary for TJP1
This gene encodes a protein located on a cytoplasmic membrane surface of intercellular tight junctions. The encoded protein may be involved in signal transduction at cell-cell junctions. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Jul 2014]
UniProt Comments for TJP1
ZO1: a scaffolding protein of the MAGUK (membrane-associated guanylate kinase) family associated with tight junctions (TJ). May mediate dynamic changes in the composition of TJs. The N-terminal may be involved in transducing a signal required for tight junction assembly, while the C-terminal may have specific properties of tight junctions. The alpha domain might be involved in stabilizing junctions. Plays a role in the regulation of cell migration by targeting the protein kinase MRCKb to the leading edge of migrating cells. Interacts with BVES (via the C-terminus cytoplasmic tail). Interacts with HSPA4 and KIRREL1. Forms homodimers and heterodimers with ZO-2 or ZO-3. Interacts with occludin, CALM, claudins, CGN, CXADR, GJA12, GJD3 and UBN1. Interacts (via ZU5 domain) with MRCKb and MYZAP. Interacts (via PDZ domain) with Cx43. ZO-2 and ZO-3 shuttle between the TJ and the nucleus, where they may regulate gene expression. TJ, or zonula occludens, are the closely associated areas of two cells whose membranes are tightly joined together. They are composed of a branching network of strands, the efficiency of which increases exponentially with the number of strands. The strands associate with transmembrane proteins that bind to similar proteins on adjacent cells, and with submembranous proteins that are anchored to the actin component of the cytoskeleton. Thus, TJs join together the cytoskeletons of adjacent cells. They endow tissues with substantial form, shape and location, enforce cellular polarity, and form barriers to molecules and pathogens. Molecules forming the membranous part of TJs include occludin, claudins, tricellulin and junctional adhesion molecules. These molecules interact with the proteins ZO-1, ZO-2 and ZO-3. Tight junction proteins can be up- or downregulated in cancer and are involved in the epithelial-mesenchymal transitions (EMT) in tumors. Alternative splicing produces two isoforms. The long isoform is found in most epithelial cell junctions. The short isoform is found both in endothelial cells and the highly specialized epithelial junctions of renal glomeruli and Sertoli cells of the seminiferous tubules.
Protein type: Motility/polarity/chemotaxis; Adaptor/scaffold
Chromosomal Location of Human Ortholog: 15q13
Cellular Component: apical junction complex; apical part of cell; apical plasma membrane; apicolateral plasma membrane; basolateral plasma membrane; cell junction; cell-cell adherens junction; cytoplasm; cytosol; gap junction; intercellular canaliculus; nucleus; plasma membrane; tight junction
Molecular Function: calmodulin binding; protein binding; protein domain specific binding
Biological Process: blastocyst formation; intercellular junction assembly; sensory perception of sound
Research Articles on TJP1
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Products associated with anti-TJP1 antibody
Pathways associated with anti-TJP1 antibody
Diseases associated with anti-TJP1 antibody
Organs/Tissues associated with anti-TJP1 antibody
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