A novel thermostable β-1,3-1,4-glucanase from Thermoascus aurantiacus and its application in oligosaccharide production from oat bran.Fermentation conditions for β-1,3-1,4-glucanase (TaGlu34) production in submerged culture by a thermophilic fungus, Thermoascus aurantiacus CAU830 were optimized.  It showed excellent thermostability with thermal denaturing half-lives of 209, 130 and 69 min at 50, 60 and 70 °C, respectively.  Furthermore, TaGlu34 efficiently degraded the β-glucan component in oat bran to produce mainly oligosaccharides with degrees of polymerization (DP) 3-5, with the highest conversion ratio of 47.1%. 
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