Issue 4, 2011

Mutation of isoleucine 705 of the oxidosqualene-lanosterol cyclase from Saccharomyces cerevisiae affects lanosterol's C/D-ring cyclization and 17α/β-exocyclic side chain stereochemistry

Abstract

Site-saturated substitution in Saccharomyces cerevisiaeoxidosqualene-lanosterol cyclase at Ile705 position produced three chair-boat-chair (C–B–C) truncated tricyclic compounds, two 17α-exocyclic protosteryl intermediates, two protosteryl C-17 truncated rearranged intermediates and the normal biosynthetic product, lanosterol. These results indicated the importance of the Ile705 residue in affecting lanosterol's C/D ring stabilization including 6-6-5 tricyclic and protosteryl C-17 cations and 17α/β–exocyclic side chain stereochemistry.

Graphical abstract: Mutation of isoleucine 705 of the oxidosqualene-lanosterol cyclase from Saccharomyces cerevisiae affects lanosterol's C/D-ring cyclization and 17α/β-exocyclic side chain stereochemistry

Supplementary files

Article information

Article type
Paper
Submitted
14 Aug 2010
Accepted
15 Oct 2010
First published
19 Oct 2010

Org. Biomol. Chem., 2011,9, 1092-1097

Mutation of isoleucine 705 of the oxidosqualene-lanosterol cyclase from Saccharomyces cerevisiae affects lanosterol's C/D-ring cyclization and 17α/β-exocyclic side chain stereochemistry

T. Wu, Y. Chang, Y. Liu, C. Chang, H. Wen, W. Li and W. Shie, Org. Biomol. Chem., 2011, 9, 1092 DOI: 10.1039/C0OB00582G

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