3beta-Hydroxy-4alpha-methylsteroid-4beta-carboxylate

3beta-hydroxy-4beta-formyl-4alpha-methylsteroid,NADH:oxygen oxidoreductase; 3beta-Hydroxy-4beta-formyl-4alpha-methylsteroid + NADH + H+ + Oxygen <=> 3beta-Hydroxy-4alpha-methylsteroid-4beta-carboxylate + NAD+ + H2O

3beta-hydroxy-4,4-dimethylsteroid,NADH:oxygen oxidoreductase (C-4beta-hydroxylating); 3beta-Hydroxy-4,4-dimethylsteroid + 3 NADH + 3 H+ + 3 Oxygen <=> 3beta-Hydroxy-4alpha-methylsteroid-4beta-carboxylate + 3 NAD+ + 4 H2O

3beta-hydroxysteroid-4beta-carboxylate:NAD+ 3-oxidoreductase (decarboxylating); 3beta-Hydroxy-4alpha-methylsteroid-4beta-carboxylate + NAD+ <=> 4alpha-Methyl-3-oxosteroid + NADH + CO2 + H+

3beta-hydroxysteroid-4beta-carboxylate:NADP+ 3-oxidoreductase (decarboxylating); 3beta-Hydroxy-4alpha-methylsteroid-4beta-carboxylate + NADP+ <=> 4alpha-Methyl-3-oxosteroid + NADPH + CO2 + H+