TJP2
Function
Plays a role in tight junctions and adherens junctions (By similarity). Acts as a positive regulator of RANKL-induced osteoclast differentiation, potentially via mediating downstream transcriptional activity (By similarity).
Involvement in disease
Hypercholanemia, familial, 1
FHCA1
A disorder characterized by elevated serum bile acid concentrations, itching, and fat malabsorption.
None
The disease may be caused by variants affecting distinct genetic loci, including the gene represented in this entry.
Cholestasis, progressive familial intrahepatic, 4
PFIC4
A disorder characterized by early onset of cholestasis that progresses to hepatic fibrosis, cirrhosis, and end-stage liver disease before adulthood. PFIC4 inheritance is autosomal recessive.
None
The disease is caused by variants affecting the gene represented in this entry.
Sequence Similarities
Belongs to the MAGUK family.
Tissue Specificity
This protein is found in epithelial cell junctions. Isoform A1 is abundant in the heart and brain. Detected in brain and skeletal muscle. It is present almost exclusively in normal tissues. Isoform C1 is expressed at high level in the kidney, pancreas, heart and placenta. Not detected in brain and skeletal muscle. Found in normal as well as in most neoplastic tissues.
Cellular localization
- Cell junction
- Adherens junction
- Cell membrane
- Peripheral membrane protein
- Cytoplasmic side
- Cell junction
- Tight junction
- Nucleus
- Also nuclear under environmental stress conditions and in migratory endothelial cells and subconfluent epithelial cell cultures.
Alternative names
X104, ZO2, TJP2, Tight junction protein ZO-2, Tight junction protein 2, Zona occludens protein 2, Zonula occludens protein 2