Protein
Diphosphoinositol polyphosphate phosphohydrolase aps1
Organism
Schizosaccharomyces pombe (strain 972 / ATCC 24843)
Function
Cleaves a beta-phosphate from the diphosphate groups in PP-InsP5 (diphosphoinositol pentakisphosphate) and [PP]2-InsP4 (bisdiphosphoinositol tetrakisphosphate). Also catalyzes the hydrolysis of dinucleoside oligophosphates, with Ap6A and Ap5A being the preferred substrates. The major reaction products are ADP and p4a from Ap6A and ADP and ATP from Ap5A.
Similarity
Belongs to the Nudix hydrolase family. DIPP subfamily.
Sequence
MLENNGSVILMEPDHLRTAVNRSMTSREGRTKNRFNPITGARLAAGVVALSADKRKVLLVSSAKKHPSWVVPKGGWEADESVQQAALREGWEEGGLVGHITRSLGSFKDKRPTDTIDRRKKYLKQLMSKSSGNDVSTNTELGAEAEKLLLPPRAECEFFEVIVERLEDNYPEMRKRRRKWMSYQEAKEALTSRKDILAALEKSSIIKEEN