3alpha,7alpha,12alpha-trihydroxycholestan-26-al 26-oxidoreductase

In enzymology, a 3alpha,7alpha,12alpha-trihydroxycholestan-26-al 26-oxidoreductase is an enzyme that catalyzes the chemical reaction


 * (25R)-3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-al + NAD+ + H2O $$\rightleftharpoons$$ (25R)-3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oate + NADH + 2 H+

The 3 substrates of this enzyme are (25R)-3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-al, NAD+, and H2O, whereas its 3 products are (25R)-3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oate, NADH, and H+.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the aldehyde or oxo group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is (25R)-3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-al:NAD+ 26-oxidoreductase. Other names in common use include cholestanetriol-26-al 26-dehydrogenase, 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-al, dehydrogenase, trihydroxydeoxycoprostanal dehydrogenase, THAL-NAD oxidoreductase, 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-al:NAD+, and 26-oxidoreductase. This enzyme participates in bile acid biosynthesis.