Skip to main content

Official Journal of the Japan Wood Research Society

Table 1 Kinetic parameters of LeHex20B. The activity was measured in 20 mM sodium acetate buffer (pH 4.2) at 37 °C for 15 min. To determine the kinetic properties of LeHex20B, the reactions were performed with 0.05–0.5 mM of substrate

From: Molecular cloning, characterization, and expression analysis of a β-N-acetylhexosaminidase (LeHex20B) from the shiitake mushroom, Lentinula edodes

Substrate

K m (μM)

k cat (s−1)

k cat/K m (s−1 mM−1)

pNP-GlcNAc

410 ± 10

91.0 ± 12.0

222

pNP-GalNAc

662 ± 43

66.8 ± 4.7

101

Chitobiose (GlcNAc2)

340 ± 13

41.3 ± 1.1

122

Chitotriose (GlcNAc3)

211 ± 18

49.1 ± 0.8

233

Chitotetraose (GlcNAc4)

180 ± 1

42.2 ± 0.3

235

Chitopentaose (GlcNAc5)

190 ± 2

38.4 ± 0.3

202

Chitohexaose (GlcNAc6)

192 ± 14

36.5 ± 1.1

190