inositol-1,3,4,5,6-pentakisphosphate 1-phosphatase activity
Catalysis of the reaction: inositol-1,3,4,5,6-pentakisphosphate + H2O = inositol-3,4,5,6-tetrakisphosphate + phosphate.
GO:0052827
inositol pentakisphosphate phosphatase activity
is_a