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Table 1 The kinetic parameters of the wild-type enzyme and the mutants

From: Improvement of alkalophilicity of an alkaline xylanase Xyn11A-LC from Bacillus sp. SN5 by random mutation and Glu135 saturation mutagenesis

Parameter

WT

M52-C10

E135V

E135R

K m (mg ml−1)

3.3 ± 0.2

3.0 ± 0.4

2.5 ± 0.6

2.6 ± 0.5

V max (μmol min−1 mg−1)

7178 ± 186

7355 ± 324

8546 ± 654

7734 ± 602

k cat (s−1)

3230 ± 84

3310 ± 146

3846 ± 294

3480 ± 271

k cat /K m (ml mg−1s−1)

978 ± 25

1103 ± 48

1538 ± 118

1339 ± 104