Table 2 Analytical biotransformation of glycine and aldehydes to α-amino acids by cascade biocatalysis

From: Asymmetric assembly of high-value α-functionalized organic acids using a biocatalytic chiral-group-resetting process

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Substratea

Product

Conv (%)

Yieldb (mg l−1)

e.e.c (%)

1a

(S)-6a

90

1478

95

 

(R)-6a

85

1396

99

1b

(S)-6b

80

1457

93

 

(R)-6b

84

1530

99

1c

(S)-6c

75

1351

98

 

(R)-6c

71

1279

99

1d

(S)-6d

93

1847

98

 

(R)-6d

89

1768

99

1e

(S)-6e

65

1158

92

 

(R)-6e

32

570

98

1f

(S)-6f

79

1189

96

 

(R)-6f

72

1028

99

1g

(S)-6g

73

1243

89

 

(R)-6g

64

1089

99

1h

(S)-6h

87

1010

97

 

(R)-6h

85

987

99

1i

(S)-6i

91

929

98

 

(R)-6i

78

796

99

  1. a Reactions were performed in duplicate with resting cells of E. coli (OA34 or OA59) (10 g dcw l−1) and 1ai (10 mM) in 2 ml KP buffer (50 mM, pH 8.0, 100 µM PLP, 1 mM NAD+, and 10% DMSO) at 200 rpm and 25 °C for 36 h
  2. b The conversion and yields were obtained after completion of the reactions and determined by HPLC analysis. The values are averages of two experiments
  3. c Enantiomeric excess (e.e.) was determined by chiral HPLC analysis (Supplementary Figs 19-26). The values are averages of two experiments