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Table 3 Characteristics of highly xylose-tolerant β-xylosidase from T. thermarum DSM 5069 and other microorganisms

From: Biochemical properties of a novel thermostable and highly xylose-tolerant β-xylosidase/α-arabinosidase from Thermotoga thermarum

Strain K m (mM) V max (U/mg) K i for xylose (mM) k cat /K m (mM-1 s-1) Optimal temp (°C)
  ap NPX bp NPAF p NPX p NPAF   p NPX p NPAF  
T. thermarum 0.27 0.21 223.2 75.0 1000 1173.4 505.9 95
d Unnamed bacterium[26] 3.43 2.23 cND ND 76.0 8.1 2.5 40
Paecilomyces thermophila[22] 4.3 ND ND ND 139 ND ND 55
Scytalidium thermophilum[21] 1.3 ND 88 ND e < 600 ND ND 60
  1. ap NPX: p-nitrophenyl-β-D-glucopyranoside.
  2. bp NPAF: p-nitrophenyl-α-L-arabinofuranoside.
  3. c ND: not determined.
  4. d Isolated from yak rumen.
  5. e Calculated by the data based on the reference[21].
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