IMP-1318

SIRPA

Recombinant human SIRP alphaV8 (AAH38510.1, with mutation Ser 44 Leu, Ser 50 Thr, Ile 52 Thr, His 54 Arg, Val 57 Ala) (Met1-Arg369) was expressed with a polyhistidine tag at the C-terminus.

Tyrosine-protein phosphatase non-receptor type substrate 1, also known as SHP substrate 1, Inhibitory receptor SHPS-1, Brain Ig-like molecule with tyrosine-based activation motifs, Macrophage fusion receptor, CD172 antigen-like family member A, SIRPA and CD172a, is a single-pass type I membrane protein which contains two Ig-like C1-type (immunoglobulin-like) domains and one Ig-like V-type (immunoglobulin-like) domain. SIRPA is ubiquitously expressed. It is highly expressed in brain and detected at lower levels in heart, placenta, lung, testis, ovary, colon, liver, small intestine, prostate, spleen, kidney, skeletal muscle and pancreas. It is also detected on myeloid cells, but not T-cells. SIRPA is an immunoglobulin-like cell surface receptor for CD47. SIRPA acts as docking protein and induces translocation of PTPN6, PTPN11 and other binding partners from the cytosol to the plasma membrane. SIRPA supports adhesion of cerebellar neurons, neurite outgrowth and glial cell attachment. It may play a key role in intracellular signaling during synaptogenesis and in synaptic function. SIRPA is involved in the negative regulation of receptor tyrosine kinase-coupled cellular responses induced by cell adhesion, growth factors or insulin. It mediates negative regulation of phagocytosis, mast cell activation and dendritic cell activation.

HEK293

Human

C-His

Glu 31

Lyophilized from sterile PBS, pH 7.4, 5 % trehalose, 5% mannitol and 0.01% Tween80.

The recombinant human SIRP alphaV8 consists of 350 amino acids and predicts a molecular mass of 38.6 kDa. As a result of glycosylation, it migrates as an approximately 49.9 kDa band in SDS-PAGE under reducing conditions.

Met1-Arg369

< 1.0 EU/μg protein as determined by the LAL method.

> 95 % as determined by SDS-PAGE.

Samples are stable for up to twelve months from date of receipt at -20 to -80 centigrade.
Store it under sterile conditions at -20 to -80 centigrade. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

Measured by its binding ability in a functional ELISA. Immobilized human CD47 at 2 μg/mL (100 μL/well) can bind human SIRPa(V8)-His, the EC50 of human SIRPa(V8)-His is 150-500 ng/mL.