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Human SIRPα Protein, hFc-His Tag

Product Overview
Catalog Number PME100009
Description Recombinant human SIRPα protein with C-terminal human Fc and 6×His tag
Synonyms SHPS1, SIRPA, CD172A, BIT, MFR, MYD1, P84, PTPNS
Expression Host HEK293
Tag C-Human Fc and 6×His tag
Molecular Characterization
Molecular Weight The protein has a predicted molecular mass of 70-98 kDa after removal of the signal peptide.
Purity The purity of the protein is greater than 95% as determined by SDS-PAGE and Coomassie blue staining.
Buffer Lyophilized from sterile PBS, pH 7.4. Normally 5 % - 23 % trehalose is added as protectants before lyophilization.
Storage Store at -80°C for 12 months (Avoid repeated freezing and thawing)
Usage Research use only
Images

Figure 1. Human SIRPα, hFc-His Tag on SDS-PAGE under reducing condition.

Figure 2. ELISA plate pre-coated by 2 μg/ml (100 μl/well) Human CD47, mFc-His tagged protein (PME100008) can bind its native ligand Human SIRPα, hFc-His tagged protein (PME100009) in a linear range of 3.3-26.37 ng/ml.

Figure 3. A: Human SIRPα, hFc-His tagged protein without freeze-thaw treatment. B: Human SIRPα, hFc-His tagged protein after one freeze-thaw cycle. C: Human SIRPα, hFc-His tagged protein after three freeze-thaw cycles. D: Human SIRPα, hFc-His tagged protein after five freeze-thaw cycles.

Figure 4. Lane 1: Human SIRPα, hFc-His tagged protein without freeze-thaw treatment, Lane 2: Human SIRPα, hFc-His tagged protein after one freeze-thaw cycle, Lane 3: Human SIRPα, hFc-His tagged protein after three freeze-thaw cycles, Lane 4: Human SIRPα, hFc-His tagged protein after five freeze-thaw cycles.


Background Tyrosine-protein phosphatase non-receptor type substrate 1 (SHPS1) is also known as CD172 antigen-like family member A (CD172a), Macrophage fusion receptor, MyD-1 antigen, Signal-regulatory protein alpha (SIRPA or SIRP alpha) or p84, is a member of the SIRP family, and also belongs to the immunoglobulin superfamily. SIRP alpha is Ubiquitous and highly expressed in brain. SIRPA / CD172a is immunoglobulin-like cell surface receptor for CD47 and acts as docking protein and induces translocation of PTPN6,PTPN11 and other binding partners from the cytosol to the plasma membrane. SIRPA / SHPS-1 supports adhesion of cerebellar neurons, neurite outgrowth and glial cell attachment and may play a key role in intracellular signaling during synaptogenesis and in synaptic function By similarity. SIRPA / MyD1 involved in the negative regulation of receptor tyrosine kinase-coupled cellular responses induced by cell adhesion, growth factors or insulin and mediates negative regulation of phagocytosis, mast cell activation and dendritic cell activation. CD47 binding prevents maturation of immature dendritic cells and inhibits cytokine production by mature dendritic cells.
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