Table 2 Properties of thermostable β-xylosidases from thermophiles
From: Highly thermostable GH39 β-xylosidase from a Geobacillus sp. strain WSUCF1
Organism | GH family | Optimum pH | Optimum temperature (°C) | Thermal stability | K m(mM) | V max(U/mg) | References |
|---|---|---|---|---|---|---|---|
Geobacillus sp. WSUCF1 | 39 | 6.5 | 70 | Half-life of 9 days at 70°C | 2.3 | 147 | This study |
Thermoanaerobacterium saccharolyticum JW/SL-YS485 | Novel | 6.0 | 65 | Half-life of 1 h at 67°C | 28.0 | 276 | [5] |
Geobacillus thermodenitrificans TSAA1 | 52 | 7.0 | 60 | Half-life of 3 h at 70°C | 2.8 | 4.16 | [7] |
Geobacillus stearothermophilus | 52 | 6.5 | 70 | Half-life of 3.4 h at 70°C | 0.15 | NA | [18] |
Bacillus stearothermophilus | NA | 6.0 | 70 | Half-life of approx. 1 h at 70°C | 1.2 | NA | [10] |
Bacillus thermantarcticus | NA | 6.0 | 70 | Stable for 1 h at 60°C | 0.5 | NA | [23] |
Geobacillus pallidus | 52 | 8.0 | 70 | Half-life of approx. 10 h at 70°C | 2.4 | 4.72 | [19] |
Geobacillus thermoleovorans IT-08 | 43 | 6.0 | 60 | Retained more than 70 % activity after 1 h at 70°C | 0.06 | NA | [21] |
Geobacillus thermoleovorans IT-08 | 43 | 5.0 | NA | Half-life of 35 min at 57.5°C | 0.55 | NA | [22] |