SIRPG
Function
Probable immunoglobulin-like cell surface receptor. On binding with CD47, mediates cell-cell adhesion. Engagement on T-cells by CD47 on antigen-presenting cells results in enhanced antigen-specific T-cell proliferation and costimulates T-cell activation.
Tissue Specificity
Detected in liver, and at very low levels in brain, heart, lung, pancreas, kidney, placenta and skeletal muscle. Expressed on CD4+ T-cells, CD8+ T-cells, CD56-bright natural killer (NK) cells, CD20+ cells, and all activated NK cells. Mainly present in the paracortical T-cell area of lymph nodes, with only sparse positive cells in the mantle and in the germinal center of B-cell follicles. In the thymus, primarily expressed in the medulla on mature T-lymphocytes that have undergone thymic selection.
Cellular localization
- Membrane
- Single-pass type I membrane protein
Alternative names
CD172g, SIRPB2, SIRPG, Signal-regulatory protein gamma, SIRP-gamma, CD172 antigen-like family member B, Signal-regulatory protein beta-2, SIRP-b2, SIRP-beta-2