该基因编码的蛋白质是一种鸟嘌呤核苷酸交换因子（gef），在轴突形成和神经元极化中起作用。编码的蛋白对rac1和rac3 rho小gtpase显示gef活性，但对cdc42不显示。已经发现了一些编码不同亚型的转录变体。[由RefSeq提供，2012年12月]
The protein encoded by this gene is a guanine nucleotide exchange factor (GEF) that plays a role in axon formation and neuronal polarization. The encoded protein displays GEF activity toward RAC1 and RAC3 Rho small GTPases but not toward CDC42. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]