CD320 antigen
Germinal center-B (GC-B) cells differentiate into memory B-cells and plasma cells (PC) through interaction with T-cells and follicular dendritic cells (FDC). CD320 augments the proliferation of PC precursors generated by IL-10. Receptor for the cellular uptake of transcobalamin bound cobalamin.
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CD320 antigen
CD320: Germinal center-B (GC-B) cells differentiate into memory B-cells and plasma cells (PC) through interaction with T-cells and follicular dendritic cells (FDC). CD320 augments the proliferation of PC precursors generated by IL-10. Receptor for the cellular uptake of transcobalamin bound cobalamin. Defects in CD320 are the cause of methylmalonic aciduria type TCblR (MMATC); also called methylmalonic aciduria due to transcobalamin receptor defect. MMATC is a metabolic disorder characterized by increased blood C3- acylcarnitine levels, elevated methylmalonate and homocysteine, and low uptake of transcobalamin-bound cobalamin, but normal conversion to adenosylcobalamin and methylcobalamin. Plasma vitamin B12 and total homocysteine are normal.
Protein type: Membrane protein, integral
Chromosomal Location of Human Ortholog: 19p13.3-p13.2
Cellular Component: endoplasmic reticulum; endosome membrane; membrane; plasma membrane
Molecular Function: cobalamin binding; cobalamin transporter activity
Biological Process: cobalamin metabolic process
Disease: Methylmalonic Aciduria Due To Transcobalamin Receptor Defect
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