Bio-activity
Measured by its binding ability in a functional ELISA. Immobilized human SIRPA-His at 10 μg/ml (100 μl/well) can bind human CD47-Fc, The EC50 of human CD47-Fc is 10.1-23.5 ng/ml. Measured by its binding ability in a functional ELISA. Immobilized mouse SIRPA-His at 10 μg/ml (100 μl/well) can bind human CD47-Fc, The EC50 of human CD47-Fc is 0.05-0.13 μg/ml. Measured by its binding ability in a functional ELISA. Immobilized human SIRPG-His at 10 μg/ml (100 μl/well) can bind human CD47-Fc, The EC50 of human CD47-Fc is 0.58-1.34 μg/ml.
Background
Has a role in both cell adhesion by acting as an adhesion receptor for THBS1 on platelets, and in the modulation of integrins. Plays an important role in memory formation and synaptic plasticity in the hippocampus (By similarity). Receptor for SIRPA, binding to which prevents maturation of immature dendritic cells and inhibits cytokine production by mature dendritic cells. Interaction with SIRPG mediates cell-cell adhesion, enhances superantigen-dependent T-cell-mediated proliferation and costimulates T-cell activation. May play a role in membrane transport and/or integrin dependent signal transduction. May prevent premature elimination of red blood cells. May be involved in membrane permeability changes induced following virus infection.