Elementary plant Biochemistry and Biotechnology (2+1)

I. Oxidoreductases

• Enzymes catalysing oxido-reductions between two substrates, S and S'. S reduced + S' oxidised → S oxidised + S' reduced
Example

CH3-CH2-OH + NAD+ → CH3-CHO + NADH + H+
(reduced) (oxidised) ---- (oxidised) (reduced)

Enzyme: Recommended name Alcohol dehydrogenase.Systematic name Alcohol:NAD+ oxido-reductase.Enzyme Commission number E.C.1.1.1.1.

• First digit 1 indicates oxido-reductase (Major class).
• Second digit 1 indicates enzymes acting on CH-OH group of donors (Sub-class).
• Third digit 1 indicates NAD+ as the electron acceptor (Sub-sub class).
• Fourth digit 1 indicates the specific enzyme