Putative succinate-semialdehyde dehydrogenase [NADP+] 2; Catalyzes the NADP(+)-dependent oxidation of succinate semialdehyde to succinate. Although it has succinate semialdehyde dehydrogenase activity, is likely to act physiologically on a different aldehyde(s). NAD(+) can substitute for NADP(+), but enzymatic activity is three times reduced (518 aa)