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Table 3 The comparison of pH and temperature properties of Gal308 to other known thermostable β-galactosidases

From: Metagenomic approach for the isolation of a thermostable β-galactosidase with high tolerance of galactose and glucose from soil samples of Turpan Basin

β-Galactosidase and its origin Substrate Optimal pH Optimal temperature Relative activity Reference
β-Galactosidase (T. maritima) lactose 6.5 80°C NT [7]
BgaB (B.stearothermophilus) ONPG 7.0 70°C 80% (65°C) [8]
β-Galactosidase (S. elviae CBS8119) ONPG 4.5-5.5 85°C ~45% (65°C) [9]
β-Galactosidase (Rhizomucor sp.) pNPG 4.5 60°C NT [11]
Bgly (A. acidocaldarius) ONPG 5.8 70°C ~85% (65°C) [12]
β-Galactosidase (C. saccharolyticus) pNPG 6.0 80°C 60% (65°C) [13]
β-Galactosidase (B. coagulans RCS3) ONPG 6.8 50°C ~40% (60°C) [23]
β-Galactosidase (P. woesei) ONPG 6.6 90°C NT [24]
BgaA (Thermus sp. IB-21) pNPG 5.0-6.0 90°C 90% (95°C) [25]
Gal308 (uncultured microbes) lactose 6.8 78°C 87.2% (65°C) This study