UniProt Summary: Claudins function as major constituents of the tight junction complexes that regulate the permeability of epithelia. While some claudin family members function as impermeable barriers, others mediate the permeability to ions and small molecules. Often, several claudin family members are coexpressed and interact with each other, and this determines the overall permeability. CLDN15 forms tight junctions that mediate the paracellular transport of small monovalent cations along a concentration gradient, due to selective permeability for Na(+), Li(+) and K(+) ions, but selects against Cl(-) ions. Plays an important role in paracellular Na(+) transport in the intestine and in Na(+) homeostasis. Required for normal Na(+)-dependent intestinal nutrient uptake. {ECO:0000269|PubMed:12055082, ECO:0000269|PubMed:13129853}.
Pfam DomainsGO Terms
Pfam Domains
PMP22 Claudin
GO Terms
calcium-independent cell-cell adhesion via plasma membrane cell-adhesion molecules
lateral plasma membrane
bicellular tight junction
structural molecule activity
cell-cell adhesion via plasma-membrane adhesion molecules
cell-cell adhesion
cell adhesion
biological adhesion
identical protein binding
ion transport
CRISPR Data
Compound HitMost Correlated Genes in ChemogenomicsTissues where Essential in the Avana Dataset (DepMap 20Q1)