Molecular function

(5Z,13E)-(15S)-9alpha,11alpha,15-trihydroxyprosta-5,13-dienoate:NADP+ 9-oxidoreductase activity, 9-keto-prostaglandin E(2) reductase activity, 9-keto-prostaglandin E2 reductase activity, 9-ketoprostaglandin reductase activity, PGE(2) 9-ketoreductase activity, PGE(2) 9-oxoreductase activity, PGE-9-ketoreductase activity, PGE2 9-ketoreductase activity, PGE2 9-oxoreductase activity, PGE2-9-OR, PGE2-9-ketoreductase activity, prostaglandin E 9-ketoreductase activity, prostaglandin E2-9-oxoreductase activity, prostaglandin-E(2) 9-oxoreductase activity, prostaglandin-E2 9-oxoreductase activity, reductase, 15-hydroxy-9-oxoprostaglandin

Catalysis of the reaction: (5Z,13E)-(15S)-9-alpha,11-alpha,15-trihydroxyprosta-5,13-dienoate + NADP+ = (5Z,13E)-(15S)-11-alpha,15-dihydroxy-9-oxoprosta-5,13-dienoate + NADPH.