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
Recombinant Squalene Synthase. Synthesis of Non-Head-to-Tail Isoprenoids in the Absence of NADPH
作者:Michael B. Jarstfer、Dong-Lu Zhang、C. Dale Poulter
DOI:10.1021/ja020410i
日期:2002.7.1
unidentified alcohol were produced in minor amounts. A methyl ether corresponding to HSQ was detected when methanol was present in the incubation buffer. These compounds are the expected "solvolysis" products from PSPP. They provide strong support for mechanisms that propose cyclopropylcarbinyl cations as intermediates in the SQase-catalyzed rearrangement of PSPP to SQ and unambiguously demonstrate that the