Cbl binds B-cell linker protein, a molecular scaffold bridging Syk to downstream signaling pathways by recruiting signaling molecules, such as Btk, phospholipase C gamma 2, Vav, and Grb2 to the cell membrane to form a signalosome complex. Cbl is believed to negatively regulate signaling from this complex. Consistent with this, Cbl inactivation reverses a number of critical defects in early B cell differentiation seen in BLNK-deficient mice (Song et al. 2007).
