CD45R Recombinant Rat Monoclonal Antibody (RA3-6B2), Invitrogen™

Description

• Specificity: This antibody is specific for murine CD45R antigen which is expressed on B lymphocytes throughout their development from early pro-B stages onwards and is down-regulated upon terminal differentiation to plasma cells
• Apart from B cells, CD45R is expressed on a small subset of dendritic cells (plasmacytoid dendritic cells)
• The CD45R mAb clone RA3-6B2 specifically recognizes the exon A-restricted isoform of mouse CD45
• CD45R (PTPRC) is a member of the protein tyrosine phosphatase (PTP) family
• PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation
• CD45 contains an extracellular domain, a single transmembrane segment and two tandem intracytoplasmic catalytic domains
• CD45 is specifically expressed in hematopoietic cells and has been shown to be an essential regulator of T- and B-cell antigen receptor signaling
• CD45 glycoprotein is crucial in lymphocyte development and antigen signaling, serving as an important regulator of Src-family kinases
• CD45 protein exists in multiple isoforms as a result of alternative splicing, and these isoforms differ in their extracellular domains, but share identical transmembrane and cytoplasmic domains
• Further, these CD45 isoforms differ in their ability to translocate into the glycosphingolipid-enriched membrane domains and their expression depends on cell type and physiological state of the cell
• In addition to its role in immunoreceptor signaling, CD45 is important in promoting cell survival by modulating integrin-mediated signal transduction pathway and is also involved in DNA fragmentation during apoptosis
• CD45RA is an isoform of the CD45 complex and has restricted expression between different subtypes of lymphoid cells
• Diseases associated with CD45 dysfunction include Severe Combined Immunodeficiency (T-cell negative, B-Cell Negative) and Hepatitis C.