Recombinant Squalene Synthase. A Mechanism for the Rearrangement of Presqualene Diphosphate to Squalene
作者:Brian S. J. Blagg、Michael B. Jarstfer、Daniel H. Rogers、C. Dale Poulter
DOI:10.1021/ja020411a
日期:2002.7.1
of squalene; and rillingol (ROH), a cyclopropylcarbinyl alcohol formed by addition of water to the tertiary cyclopropylcarbinyl cation previously proposed as an intermediate in the rearrangement of PSPP to SQ (Poulter, C. D. Acc. Chem. Res. 1990, 23, 70-77). The structure and absolute stereochemistry of the tertiary cyclopropylcarbinyl alcohol were established by synthesis using two independent routes
[EN] STRIGOLACTONE FORMULATIONS AND USES THEREOF<br/>[FR] FORMULATIONS DE STRIGOLACTONE ET LEURS UTILISATIONS
申请人:ASILOMAR BIO INC
公开号:WO2015061764A1
公开(公告)日:2015-04-30
Disclosed herein plant propagation materials, methods of manufacturing, formulations and uses thereof. The plant propagation materials disclosed herein may comprise a strigolactone obtained by a biosynthetic process. The plant propagation material may comprise a chemical mimic of a strigolactone. The strigolactone may be 5-deoxystrigol. Methods of manufacturing the plant propagation materials may comprise a chemical process. Alternatively, methods of manufacturing the plant propagation material may comprise a biosynthetic process. The methods may comprise use of one or more polynucleotides. The polynucleotides may encode a metabolite. The polynucleotides may comprise one or more genes encoding one or more components of a strigolactone pathway.
From a red alga Laurencia okamurai (10R̃, 11R̃)-(+)-squalene-10, 11-epoxide 1̃ was isolated and its asymmetricsynthesis has been achieved starting from trans, trans-farnesol.
To accumulate the chemical basis of epoxide-opening cascade biogenesis, chemical syntheses of sesqui- and triterpenoids were performed. The biomimetic total syntheses of (−)-neroplofurol (1) and (+)-ekeberin D4 (2) were accomplished by protic acid-catalyzed hydrolysis of the terminal epoxide from nerolidol diepoxide 3 and squalene tetraepoxide 4 through single and double 5-exo cyclizations in intermediates 5 and 6, respectively. This chemical reaction mimics the direct hydrolysis mechanism of epoxide hydrolases, enzymes that catalyze an epoxide-opening reaction to finally produce vicinal diols.