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Industrial Biotransformations

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Aminopeptidase<br />

Pseudomonas putida<br />

R<br />

NH2<br />

O<br />

OMe<br />

MeOH<br />

H2SO4<br />

1 = aldehyde<br />

2 = amino nitrile<br />

3 = α-amino acid amide<br />

4 = α-amino acid methyl ester<br />

5 = α-amino acid<br />

6 = α-amino acid amide<br />

7 = schiff base of α-amino acid amide<br />

Fig. 3.4.11.1 – 2<br />

338<br />

1) NH3<br />

2) PhCHO<br />

3) OH- (pH 13)<br />

racemization<br />

4) H3O +<br />

R<br />

NH2<br />

O<br />

OH<br />

R<br />

O<br />

R H<br />

H2N CN<br />

R H<br />

+<br />

1<br />

2<br />

NH2<br />

O<br />

D,L-3<br />

+ HCN<br />

+ NH 3<br />

OH- acetone<br />

NH2<br />

R<br />

NH2<br />

O<br />

NH2<br />

+PhCHO<br />

(pH 8-11)<br />

Ph<br />

EC 3.4.11.1<br />

1) OH- (pH 13)<br />

racemization<br />

2) H3O +<br />

L-4 L-5 D-6 D-7<br />

E<br />

R<br />

R<br />

N<br />

1) H3O +<br />

2) OH- O<br />

NH 2<br />

NH 2<br />

- CO2<br />

- NH3<br />

O<br />

D-5<br />

OH

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