Recombinant Human Sodium/calcium exchanger 3 (SLC8A3), Truncated

Uniprot Id

P57103

Target Species

Human

Target Name

SLC8A3

Target Full Name

Sodium/calcium exchanger 3

Target Function

Mediates the electrogenic exchange of Ca(2+) against Na(+) ions across the cell membrane, and thereby contributes to the regulation of cytoplasmic Ca(2+) levels and Ca(2+)-dependent cellular processes. Contributes to cellular Ca(2+) homeostasis in excitable cells, both in muscle and in brain. In a first phase, voltage-gated channels mediate the rapid increase of cytoplasmic Ca(2+) levels due to release of Ca(2+) stores from the endoplasmic reticulum. SLC8A3 mediates the export of Ca(2+) from the cell during the next phase, so that cytoplasmic Ca(2+) levels rapidly return to baseline. Contributes to Ca(2+) transport during excitation-contraction coupling in muscle. In neurons, contributes to the rapid decrease of cytoplasmic Ca(2+) levels back to baseline after neuronal activation, and thereby contributes to modulate synaptic plasticity, learning and memory. Required for normal oligodendrocyte differentiation and for normal myelination. Mediates Ca(2+) efflux from mitochondria and contributes to mitochondrial Ca(2+) ion homeostasis.

Target Subcellular Location

Cell membrane; Multi-pass membrane protein. Perikaryon. Cell projection, dendrite. Cell projection, dendritic spine. Cell membrane, sarcolemma. Cytoplasm, sarcoplasm. Cell junction. Mitochondrion outer membrane; Multi-pass membrane protein. Cytoplasm, perinuclear region. Endoplasmic reticulum membrane; Multi-pass membrane protein.

Target Protein Families

Ca(2+):cation antiporter (CaCA) (TC 2.A.19) family, SLC8 subfamily

Target Tissue Specificity

Isoform 2 is expressed in brain and skeletal muscle. Isoform 3 is expressed in excitable cells of brain, retina and skeletal muscle. Isoform 4 is expressed in skeletal muscle.

Target Synonyms

SLC8A3; NCX3; Sodium/calcium exchanger 3; Na(+)/Ca(2+)-exchange protein 3; Solute carrier family 8 member 3

Target Background

This gene encodes a member of the sodium/calcium exchanger integral membrane protein family. Na+/Ca2+ exchange proteins are involved in maintaining Ca2+ homeostasis in a wide variety of cell types. The protein is regulated by intracellular calcium ions and is found in both the plasma membrane and intracellular organellar membranes, where exchange of Na+ for Ca2+ occurs in an electrogenic manner. Alternative splicing has been observed for this gene and multiple variants have been described.