FEATURES

FAMILY

DESCRIPTION

Also known as LRC8E_HUMAN, LRRC8E. Non-essential component of the volume-regulated anion channel (VRAC, also named VSOAC channel), an anion channel required to maintain a constant cell volume in response to extracellular or intracellular osmotic changes (PubMed:24790029, PubMed:26824658, PubMed:28193731). The VRAC channel conducts iodide better than chloride and can also conduct organic osmolytes like taurine (PubMed:24790029, PubMed:26824658). Mediates efflux of amino acids, such as aspartate, in response to osmotic stress (PubMed:28193731). The VRAC channel also mediates transport of immunoreactive cyclic dinucleotide GMP-AMP (2'-3'-cGAMP), an immune messenger produced in response to DNA virus in the cytosol (PubMed:33171122). Channel activity requires LRRC8A plus at least one other family member (LRRC8B, LRRC8C, LRRC8D or LRRC8E); channel characteristics depend on the precise subunit composition (PubMed:24790029, PubMed:26824658, PubMed:28193731). Also plays a role in lysosome homeostasis by forming functional lysosomal VRAC channels in response to low cytoplasmic ionic strength condition: lysosomal VRAC channels are necessary for the formation of large lysosome-derived vacuoles, which store and then expel excess water to maintain cytosolic water homeostasis (PubMed:33139539). Heterohexamer (Probable). Oligomerizes with other LRRC8 proteins (LRRC8A, LRRC8C, LRRC8D and/or LRRC8B) to form a heterohexamer (PubMed:24790029, PubMed:26824658, PubMed:28193731). Detected in a channel complex that contains LRRC8A, LRRC8C and LRRC8E (PubMed:28193731). In vivo, the subunit composition may depend primarily on expression levels, and heterooligomeric channels containing various proportions of the different LRRC8 proteins may coexist (Probable).

EXTERNAL LINKS

LRRC8E

Volume-regulated anion channel subunit LRRC8E

LRRC8E

Molecular Synopsis