1.2.1.75 malonyl-CoA + NADPH + H+ structural analysis reveals an unexpected reaction cycle in which NADP+ and CoA successively occupy identical binding sites, proposed reaction mechanism Sulfurisphaera tokodaii malonate semialdehyde + CoA + NADP+ - ? 423815 1.2.1.75 malonyl-CoA + NADPH + H+ - Sulfurisphaera tokodaii DSM 16993 malonate semialdehyde + CoA + NADP+ - ? 423815 1.2.1.75 malonyl-CoA + NADPH + H+ structural analysis reveals an unexpected reaction cycle in which NADP+ and CoA successively occupy identical binding sites, proposed reaction mechanism Sulfurisphaera tokodaii DSM 16993 malonate semialdehyde + CoA + NADP+ - ? 423815 1.2.1.75 malonyl-CoA + NADPH + H+ - Erythrobacter dokdonensis DSW-74 malonate semialdehyde + CoA + NADP+ - ? 423815 1.2.1.75 additional information enzyme additionally catalyzes the second reduction step of malonate semialdehyde + NADPH + H+ to 3-hydroxypropionate + NADP+. Reverse reaction starting with 3-hydroxypropionate does not require CoA and probably stops at malonate semialdehyde. No substrates are acetyl-CoA, propionyl-CoA, succinyl-CoA, or glyoxylate Chloroflexus aurantiacus ? - ? 89 1.2.1.75 succinyl-CoA + NADPH + H+ - Sulfurisphaera tokodaii succinic semialdehyde + CoA + NADP+ - ? 424096 1.2.1.75 succinyl-CoA + NADPH + H+ - Sulfurisphaera tokodaii DSM 16993 succinic semialdehyde + CoA + NADP+ - ? 424096 1.2.1.75 malonate semialdehyde + coenzyme A + NADP+ - Sulfurisphaera tokodaii malonyl-CoA + NADPH + H+ - r 405760 1.2.1.75 malonyl-CoA + NADPH + H+ - Sulfurisphaera tokodaii malonate semialdehyde + coenzyme A + NADP+ - r 405763 1.2.1.75 succinate semialdehyde + coenzyme A + NADP+ - Sulfurisphaera tokodaii succinyl-CoA + NADPH + H+ - r 406706