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Beta-2-microglobulin (B2M) is a 12-14 kDa protein that is a subunit of the major histocompatibility complex (MHC) class I. Human beta 2 Microglobulin associated with HLA Class I antigens are expressed on many types of cells including lymphocytes, thymocytes, monocytes, granulocytes, platelets, endothelial cells, and epithelial cells, but is absent on erythrocytes. Beta-2 microglobulin is also found in free form in the plasma. The amino acid sequence of Beta-2-microglobulin is homologous to the constant regions of immunoglobulin heavy and light chains, with a predominantly beta pleated sheet structure. The protein is ubiquitously expressed in the cytoplasm, and is involved in antigen processing and presentation. Beta-2-microglobulin also plays a role in TCR signaling, and downstream signaling in naive CD8+ cells. Beta 2-microglobulin is encoded by the B2M gene located on chromosome 15. A mutation in the Beta-2-microglobulin gene has been shown to result in hypercatabolic hypoproteinemia. Levels of beta 2 microglobulin can be used to assess renal function in kidney transplant recipients. Beta-2-microglobulin that protein can be used as a prognostic marker for HIV infection.
仅用于科研。不用于诊断过程。未经明确授权不得转售。
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蛋白别名: B-F; B2-microglobulin; Beta 2 microglobin; Beta 2 microglobulin; Beta-2-microglobulin; Beta2 microglobulin; MHC Class I; microglobulin beta-2; Orla-B2m
基因别名: B2M; b2m-W01; b2m-W03; b2m-Z01; b2m-Z02; b2m-Z03
UniProt ID: (Chicken) P21611
Entrez Gene ID: (Chicken) 414830