GMF-β Protein, Mouse

Glia maturation factor-β (GMF-β) is a highly evolutionarily conserved protein belonging to the ADF/cofilin superfamily, first isolated from bovine brain tissue in 1972. Predominantly expressed in the central nervous system (CNS), GMF-β is also detected in various peripheral tissues including colon, thymus, and kidney. As a critical regulator of the Arp2/3 complex-mediated actin cytoskeleton remodeling, GMF-β controls branched actin content, lamellipodial dynamics, and cellular motility. Structurally, GMF-β lacks a classical signal peptide but can be secreted through non-conventional pathways, functioning as both an intracellular signaling molecule and an extracellular modulator of glial cell maturation and differentiation. Whole-body knockout studies in mice demonstrate that GMF-β deficiency is non-lethal, suggesting potential redundancy or compensation mechanisms, yet reveals marked impairments in motor performance, learning capabilities, and inflammatory responses.