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Description
Biotinylated SIRP-α/CD172A Fc&Avi Tag Protein, MouseProduct Specification Species Mouse Synonyms BIT, MFR, MYD1, P84, PTPNS1,SHP substrate 1, SHPS1, SHPS1, CD172A Accession P97797 1 Amino Acid Sequence Lys32 Asn373, with C hIgG1 Fc and Avitag Expression System HEK293 Molecular Weight 95 110kDa (Reducing) Purity 95% by SDS PAGE Endotoxin <1EU g Physical Appearance Lyophilized Powder Storage Buffer PBS, pH7. 4. Reconstitution Reconstitute at 0. 1 1 mg ml according to the size in ultrapure water after
Product Specification
| Species | Mouse |
| Synonyms | BIT, MFR, MYD1, P84, PTPNS1,SHP substrate 1, SHPS1, SHPS1, CD172A |
| Accession | P97797-1 |
| Amino Acid Sequence | Lys32-Asn373, with C-hIgG1 Fc and Avitag |
| Expression System | HEK293 |
| Molecular Weight | 95-110kDa (Reducing) |
| Purity | ＞95% by SDS-PAGE |
| Endotoxin | <1EU/μg |
| Physical Appearance | Lyophilized Powder |
| Storage Buffer | PBS, pH7.4. |
| Reconstitution | Reconstitute at 0.1-1 mg/ml according to the size in ultrapure water after rapid centrifugation. |
| Stability & Storage | · 12 months from date of receipt, lyophilized powder stored at -20 to -80℃. · 3 months, -20 to -80℃ under sterile conditions after reconstitution. · 1 week, 2 to 8℃ under sterile conditions after reconstitution. · Please avoid repeated freeze-thaw cycles. |
| Reference | 1. Barclay, A.N. & M.H. Brown (2006) Nat. Rev. Immunol. 6:457. 2. vanBeek, E.M. et al. (2005) J. Immunol. 175:7781. 3. Liu, Y. et al. (2005) J. Biol. Chem. 280:36132. 4. Kharitonenkov, A. et al. (1997) Nature 386:181. |
Background
Signal regulatory protein alpha (SIRP alpha, designated CD172a), also called SHPS-1 (SHP substrate 1) and previously, MyD-1 (Myeloid/Dendritic-1), is a monomeric ~90 kDa type I transmembrane glycoprotein that belongs to the SIRP/SHPS (CD172) family of the immunoglobulin superfamily. SIRPs are paired receptors, with similar extracellular domains but differing C-termini and functions. The 503 amino acid (aa) human SIRP alpha contains a 342 aa extracellular domain (ECD), with one V-type, and two C1 type Ig domains, and three potential N glycosylation sites. It has a 110 aa cytoplasmic sequence with ITIM motifs that recruit tyrosine phosphatases SHP-1 and SHP-2 when phosphorylated.SIRP alpha is expressed mainly on myeloid cells, including macrophages, neutrophils, dendritic and Langerhans cells. It is also found on neurons, smooth muscle and endothelial cells. SIRP alpha shows adhesion to the ubiquitous CD47/IAP (integrin associated protein), while SIRP gamma binds more weakly and SIRP alpha 1 does not bind at all.Mouse and human SIRP alpha -CD47 binding only cross-reacts for specific polymorphisms and influences engraftment of xenotransplanted stem cells. SIRP alpha engagement generally produces a negative regulatory signal. Low SIRP alpha recognition of CD47, which occurs on aged erythrocytes or platelets or xenogenic cells, promotes clearance of CD47low cells from circulation. SIRP alpha recognition of surfactants SP-A and SP-D in the lung can inhibit alveolar macrophage cytokine production.
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