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- W2406232071 abstract "Abstract 2′-O-Methylribonucleosides (2′-OMe-NRs) are promising raw materials for nucleic acid drugs because of their high thermal stability and nuclease tolerance. In the course of microbial screening for metabolic activity toward 2′-OMe-NRs, Lactobacillus buchneri LBK78 was found to decompose 2′-O-methyluridine (2′-OMe-UR). The enzyme responsible was partially purified from L. buchneri LBK78 cells by a four-step purification procedure, and identified as a novel nucleoside hydrolase. This enzyme, LbNH, belongs to the nucleoside hydrolase superfamily, and formed a homotetrameric structure composed of subunits with a molecular mass around 34 kDa. LbNH hydrolyzed 2′-OMe-UR to 2′-O-methylribose and uracil, and the kinetic constants were Km of 0.040 mM, kcat of 0.49 s−1, and kcat/Km of 12 mM−1 s−1. In a substrate specificity analysis, LbNH preferred ribonucleosides and 2′-OMe-NRs as its hydrolytic substrates, but reacted weakly with 2′-deoxyribonucleosides. In a phylogenetic analysis, LbNH showed a close relationship with purine-specific nucleoside hydrolases from trypanosomes." @default.
- W2406232071 created "2016-06-24" @default.
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- W2406232071 date "2016-08-02" @default.
- W2406232071 modified "2023-10-09" @default.
- W2406232071 title "A novel nucleoside hydrolase from Lactobacillus buchneri LBK78 catalyzing hydrolysis of 2′-O-methylribonucleosides" @default.
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- W2406232071 doi "https://doi.org/10.1080/09168451.2016.1182853" @default.
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