该基因是果蝇“纺锤体异常”基因（asp）的人类同源基因，对胚胎神经母细胞的正常有丝分裂纺锤体功能至关重要在小鼠中的研究也表明该基因在有丝分裂纺锤体调控中的作用，在调节神经发生中具有优先作用。该基因突变与小头畸形原发性5型相关。已发现该基因编码不同亚型的多个转录变体。[由RefSeq提供，2011年5月]

This gene is the human ortholog of the Drosophila melanogaster 'abnormal spindle' gene (asp), which is essential for normal mitotic spindle function in embryonic neuroblasts. Studies in mouse also suggest a role of this gene in mitotic spindle regulation, with a preferential role in regulating neurogenesis. Mutations in this gene are associated with microcephaly primary type 5. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, May 2011]