这个基因编码肌醇磷酸激酶家族的一个成员编码蛋白可能负责将肌醇六磷酸酯（insp6）转化为二磷酸鸟苷醇五磷酸酯（insp7/pp-insp5）。也可将1,3,4,5,6-五磷酸（insp5）转化为pp-insp4。另外，已经描述了剪接转录变体。[由RefSeq提供，2011年6月]
This gene encodes a member of the inositol phosphokinase family. The encoded protein may be responsible for the conversion of inositol hexakisphosphate (InsP6) to diphosphoinositol pentakisphosphate (InsP7/PP-InsP5). It may also convert 1,3,4,5,6-pentakisphosphate (InsP5) to PP-InsP4. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jun 2011]