FXYD5 Lysate – Tissue Lysate

This gene encodes a member of a family of small membrane proteins that share a 35-amino acid signature sequence domain, beginning with the sequence PFXYD and containing 7 invariant and 6 highly conserved amino acids. The approved human gene nomenclature for the family is FXYD-domain containing ion transport regulator. Mouse FXYD5 has been termed RIC (Related to Ion Channel). FXYD2, also known as the gamma subunit of the Na,K-ATPase, regulates the properties of that enzyme. FXYD1 (phospholemman), FXYD2 (gamma), FXYD3 (MAT-8), FXYD4 (CHIF), and FXYD5 (RIC) have been shown to induce channel activity in experimental expression systems. Transmembrane topology has been established for two family members (FXYD1 and FXYD2), with the N-terminus extracellular and the C-terminus on the cytoplasmic side of the membrane. This gene product, FXYD5, is a glycoprotein that functions in the up-regulation of chemokine production, and it is involved in the reduction of cell adhesion via its ability to down-regulate E-cadherin. It also promotes metastasis, and has been linked to a variety of cancers. Alternative splicing results in multiple transcript variants. [RefSeq curation by Kathleen J. Sweadner, Ph.D., sweadner@helix.mgh.harvard.edu., Sep 2009]

FXYD5: Involved in down-regulation of E-cadherin which results in reduced cell adhesion. Promotes metastasis. Belongs to the FXYD family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Cell adhesion; Actin-binding; Membrane protein, integral

Chromosomal Location of Human Ortholog: 19q13.12

Cellular Component: integral to membrane

Molecular Function: cadherin binding; ion channel activity; actin binding

Biological Process: microvillus biogenesis; negative regulation of calcium-dependent cell-cell adhesion