1
|
Li P, Sun C, Wang Y, Wang S, Yan C, Deng S, Huo X, Feng L, Wang C, Tian Y, Zhang B, Ma X. Efficiently regioselective glucosylation of estrogen analogues mediated by fungus Rhizopus oryzae AS 3.2380. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.04.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
|
2
|
Chiu HH, Shen MY, Liu YT, Fu YL, Chiu YA, Chen YH, Huang CP, Li YK. Diversity of sugar acceptor of glycosyltransferase 1 from Bacillus cereus and its application for glucoside synthesis. Appl Microbiol Biotechnol 2016; 100:4459-71. [PMID: 26795959 DOI: 10.1007/s00253-015-7270-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 12/08/2015] [Accepted: 12/22/2015] [Indexed: 12/31/2022]
Abstract
Glycosyltransferase 1 from Bacillus cereus (BcGT1) catalyzes the transfer of a glucosyl moiety from uridine diphosphate glucose (UDP-glucose) to various acceptors; it was expressed and characterized. The specificity of acceptors was found to be broad: more than 20 compounds classified into O-, S-, and N-linkage glucosides can be prepared with BcGT1 catalysis. Based on this work, we conclude that the corresponding acceptors of these compounds must possess the following features: (1) the acceptors must contain at least one aromatic or fused-aromatic or heteroaromatic ring; (2) the reactive hydroxyl or sulfhydryl or amino group can attach either on the aromatic ring or on its aliphatic side chain; and (3) the acceptors can be a primary, secondary, or even a tertiary amine. Four representative acceptors-fluorescein methyl ester, 17-β-estradiol, 7-mercapto-4-methylcoumarin, and 6-benzylaminopurine-were chosen as a candidate acceptor for O-, S-, and N-glucosidation, respectively. These enzymatic products were purified and the structures were confirmed with mass and NMR spectra. As all isolated glucosides are β-anomers, BcGT1 is confirmed to be an inverting enzyme. This study not only demonstrates the substrate promiscuity of BcGT1 but also showed the great application prospect of this enzyme in bioconversion of valuable bioactive molecules.
Collapse
Affiliation(s)
- Hsi-Ho Chiu
- Department of Applied Chemistry, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 30010, Taiwan
| | - Mo-Yuan Shen
- Department of Applied Chemistry, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 30010, Taiwan
| | - Yuan-Ting Liu
- Department of Applied Chemistry, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 30010, Taiwan
| | - Yu-Lieh Fu
- Department of Applied Chemistry, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 30010, Taiwan
| | - Yu-An Chiu
- Department of Applied Chemistry, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 30010, Taiwan
| | - Ya-Huei Chen
- Department of Applied Chemistry, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 30010, Taiwan
| | - Chin-Ping Huang
- Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Chutung, Hsinchu, 31040, Taiwan
| | - Yaw-Kuen Li
- Department of Applied Chemistry, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 30010, Taiwan.
| |
Collapse
|
3
|
Application of silver N-heterocyclic carbene complexes in O-glycosidation reactions. Carbohydr Res 2011; 346:2337-41. [PMID: 21911215 DOI: 10.1016/j.carres.2011.07.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 07/20/2011] [Accepted: 07/26/2011] [Indexed: 11/23/2022]
Abstract
We report the efficient O-glycosidation of glycosyl bromides with therapeutically relevant acceptors facilitated by silver N-heterocyclic carbene (Ag-NHC) complexes. A set of four Ag-NHC complexes was synthesized and evaluated as promoters for glycosidation reactions. Two new bis-Ag-NHC complexes derived from ionic liquids 1-benzyl-3-methyl-1H-imidazolium chloride and 1-(2-methoxyethyl)-3-methylimidazolium chloride were found to efficiently promote glycosidation, whereas known mono-Ag complexes of 1,3-bis(2,4,6-trimethylphenyl)imidazolium chloride and 1,3-bis(2,6-di-isopropylphenyl)imidazolium chloride failed to facilitate the reaction. The structures of the promoters were established by X-ray crystallography and these complexes were employed in the glycosidation of different glycosyl bromide donors with biologically valuable acceptors, such as estrone, estradiol, and various flavones. The products were obtained in yields considered good to excellent, and all reactions were highly selective for the β isomer regardless of neighboring group effects.
Collapse
|
4
|
Talisman IJ, Kumar V, Razzaghy J, Malhotra SV. O-Glycosidation reactions promoted by in situ generated silver N-heterocyclic carbenes in ionic liquids. Carbohydr Res 2011; 346:883-90. [DOI: 10.1016/j.carres.2011.03.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Revised: 02/23/2011] [Accepted: 03/03/2011] [Indexed: 10/18/2022]
|