该基因编码一个包含在骨骼肌、平滑肌和外周血淋巴细胞中表达的蛋白质的谱蛋白重复序列，该蛋白定位于核膜。该基因的突变与常染色体隐性遗传的脊髓小脑共济失调8有关，也被称为常染色体隐性遗传的小脑共济失调1型或Beauce隐性共济失调。另外，还描述了编码不同亚型的剪接转录变体[由RefSeq提供，2008年7月]
This gene encodes a spectrin repeat containing protein expressed in skeletal and smooth muscle, and peripheral blood lymphocytes, that localizes to the nuclear membrane. Mutations in this gene have been associated with autosomal recessive spinocerebellar ataxia 8, also referred to as autosomal recessive cerebellar ataxia type 1 or recessive ataxia of Beauce. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]