A novel beta-glucosidase from Streptomyces griseus was cloned and overexpressed in E. coli. The purified beta-glucosidase (44 kDa) had a K-m of 8.6 +/- 0.5 mM and a V-max of 217 +/- 5.0 mu moles(-1)min(-1)mg at 37 C-omicron, pH 7.2 with p-nitrophenyl-beta-D glucopyranoside as substrate. The enzyme was characterised in terms of pH optimum (pH 6.9), temperature optimum (69 C-omicron) and the influence of solvents and effectors. Purified S. griseus beta-glucosidase was successfully immobilised, by simple absorption, onto zinc oxide (ZnO) nanoparticles without covalent modification. It remained tightly bound even after extensive washing and could be reused up to ten times without significant loss of activity. The immobilised enzyme had a higher optimum temperature and greater thermostability than the free enzyme. In immobilised form the enzyme readily catalysed the synthesis of alkyl glucosides. (C) 2017 Elsevier Inc. All rights reserved.