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New nucleoside hydrolase with transribosylation activity from Agromyces sp. MM-1 and its application for enzymatic synthesis of 2′-O-methylribonucleosides.
- Source :
-
Journal of Bioscience & Bioengineering . Jan2018, Vol. 125 Issue 1, p38-45. 8p. - Publication Year :
- 2018
-
Abstract
- Microorganisms were screened for transribosylation activity between 2′- O -methyluridine (2′-OMe-UR) and nucleobases, for the purpose of developing a biotransformation process to synthesize 2′- O -methylribonucleosides (2′-OMe-NRs), which are raw materials for nucleic acid drugs. An actinomycete, Agromyces sp. MM-1 was found to produce 2′- O -methyladenosine (2′-OMe-AR) when whole cells were used in a reaction mixture containing 2′-OMe-UR and adenine. The enzyme responsible for the transribosylation was partially purified from Agromyces sp. MM-1 cells through a six-step separation procedure, and identified as a nucleoside hydrolase family enzyme termed Ag NH. Ag NH was a bi-functional enzyme catalyzing both hydrolysis towards 2′-OMe-NRs and transribosylation between 2′-OMe-UR and various nucleobases as well as adenine. In the hydrolysis reaction, Ag NH preferred guanosine analogues as its substrates. In the transribosylation reaction, Ag NH showed strong activity towards 6-chloroguanine, with 25-fold relative activity when adenine was used as the acceptor substrate. The transribosylation reaction product from 2′-OMe-UR and 6-chloroguanine was determined to 2′- O -methyl-6-chloroguanosine (2′-OMe-6ClGR). Under the optimal conditions, the maximum molar yield of 2′-OMe-6ClGR reached 2.3% in a 293-h reaction, corresponding to 440 mg/L. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13891723
- Volume :
- 125
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Bioscience & Bioengineering
- Publication Type :
- Academic Journal
- Accession number :
- 126947055
- Full Text :
- https://doi.org/10.1016/j.jbiosc.2017.07.016