這個基因編碼肌醇磷酸激酶家族的一個成員編碼蛋白可能負責將肌醇六磷酸酯（insp6）轉化為二磷酸鳥苷醇五磷酸酯（insp7/pp-insp5）。也可將1,3,4,5,6-五磷酸（insp5）轉化為pp-insp4。另外，已經描述了剪接轉錄變體。[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]