A novel member of mitochondrial carrier superfamily has been identified from human bone marrow stromal cells (BMSC) and designated as human BMSC-derived mitochondrial carrier protein (HuBMSC-MCP). It encodes a 321 amino-acid protein with three tandem related domains of about 100 amino acids. Each domain contains two hydrophobic stretches, which are thought to span the membrane as alpha-helices. Distant relationship analysis indicates that the protein is highly conserved between species from Caenorhabditis elegans to human. HuBMSC-MCP gene is mapped to chromosome 11p11. HuBMSC-MCP mRNA expression is detectable in various human tissues and cell lines. By confocal imaging, HuBMSC-MCP is localized to mitochondria and also detected in the pseudopodial protrusion of human breast adenocarcinoma MCF-7 cells. When transfected into dendritic cells (DC), HuBMSC-MCP could enhance DCs endocytotic capacity. Thus, HuBMSC-MCP is a phylogenetically conserved and widely expressed mitochondrial carrier protein which perhaps associates with mitochondrial oxidative phosphorylation.
The directed movement of substances (such as macromolecules, small molecules, ions) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter or pore.
Protein involved in the transport of a molecule (metabolite, protein, etc), a ion or an electron across cell membranes, inside the cell or in a tissue fluid.
A reference proteome is a set of protein sequences derived from a complete proteome which constitutes a defined standard for a particular user community. Reference proteomes are manually defined according to a number of criteria. They cover the proteomes of well- studied model organisms and other proteomes of interest for biomedical and biotechnological research. Reference proteomes have been selected to provide broad coverage of the tree of life, and constitute a representative cross-section of the taxonomic diversity to be found within UniProtKB.
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