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. 2008 May 2;12(4):587–594. doi: 10.1007/s00792-008-0164-8

Table 2.

The kinetic properties at 70°C of wild-type enzyme and mutant 13F2

Substrate/cofactor Wild-type AdhA 13F2
K m (mM) V max (U mg−1) k cat/K (s−1 mM−1) K m (mM) V max (U mg−1) k cat/Km (s−1 mM−1)
2,5-hexanedione 56.4 ± 0.6 1.9 ± 0.1 0.01 79.0 ± 1.7 2.9 ± 0.4 0.02
Pyruvaldehyde 1.2 ± 0.03 10.4 ± 0.2 3.8 4.2 ± 0.1 52.7 ± 0.5 5.4
(2S,5S)-hexanediol 5.4 ± 0.3 12.8 ± 0.4 1.0 327.6 ± 9.6 28.1 ± 1.1 0.04
2-pentanol 30.3 ± 0.4 13.1 ± 0.8 0.1 51.1 ± 0.9 24.7 ± 2.1 0.2
NADPHa 0.4 ± 0.02 10.3 ± 0.07 0.1 ± 0.01 48.3 ± 0.9
NADP+ 0.2 ± 0.03 12.8 ± 0.2 0.7 ± 0.08 37.3 ± 1.0

All measurements were performed in duplicate

aThe kinetic parameters for NADPH and NADP+ were determined using, respectively, pyruvaldehyde and 2-pentanol as substrate