Catalysis of the reaction: succinate semialdehyde + NADP+ + H2O = succinate + NADPH + 2 H+.
Source:RHEA:13213,
GOC:bf
Comment
This function is similar to EC:1.2.1.24 [succinate-semialdehyde dehydrogenase (NAD+)], and EC:1.2.1.16 [succinate-semialdehyde dehydrogenase (NAD(P)+)], but is specific for NADP+.