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Keywords:

  • thermophilic microorganisms;
  • nucleoside phosphorylase;
  • whole cell immobilization;
  • prodrug precursors;
  • transglycosylation

Abstract

An efficient and green bioprocess to obtain 2,6-diaminopurine nucleosides using thermophilic bacteria is herein reported. Geobacillus stearothermophilus CECT 43 showed a conversion rate of 90 and 83% at 2 h to obtain 2,6-diaminopurine-2′-deoxyriboside and 2,6-diaminopurine riboside, respectively. The selected biocatalyst was successfully stabilized in an agarose matrix and used to produce up to 23.4 g of 2,6-diaminopurine-2′-deoxyriboside in 240 h of process. These nucleoside analogues can be used as prodrug precursors or in antisense oligonucleotide synthesis. © 2012 American Institute of Chemical Engineers Biotechnol. Prog., 2012