Cell membrane-cytoskeleton-associated protein that plays a role in the regulation of actin polymerization at the barbed end of actin filaments. Prevents F-actin heterodimeric capping protein (CP) activity at the leading edges of migrating cells, and hence generates uncapped barbed ends and enhances actin polymerization (PubMed:26466680). Plays a role in cell protrusion formations; involved in cell polarity, lamellipodial assembly, membrane ruffling and macropinosome formations (PubMed:19846667,

CytoplasmCytoplasm, cytoskeletonCell membraneCell projection, lamellipodiumCell projection, ruffle

Immunodeficiency 58

An autosomal recessive primary immunodeficiency characterized by a variety of infectious diseases, including mycobacterial diseases, mucocutaneous candidiasis, silent but detectable EBV viremia, and staphylococcal diseases. Patients suffer from dermatitis, esophagitis, recurrent skin abscesses and chest infections. Immunologic analysis shows defective T-cell function and deficient CD3/CD28 stimulation responses in both CD4+ and CD8+ T cells. B-cell function may also be impaired.