A new approach to the side chain formation of 24-alkyl-22-hydroxy steroids: Application to the preparation of early brassinolide biosynthetic precursors
作者:Alaksiej L. Hurski、Vladimir N. Zhabinskii、Vladimir A. Khripach
DOI:10.1016/j.steroids.2012.03.010
日期:2012.6
introduction of the 22-hydroxyl group has been achieved by epoxidation of the Delta(22)-double bond, nucleophilic opening of the intermediate mesyl epoxide with sodium sulfide, and desulfurization of the formed tetrahydrothiophenes with Raneynickel.
The putativeintermediates in brassinolide biosynthesis, 22α-hydroxycampesterol 1, 6-deoxocathasterone and its 6α-hydroxylated compound 3, as well as cathasterone 4, are synthesized from a known (22E,24S)-6β-methoxy-3α,5-cyclo-5α-ergost-22-ene 5.
Cytochrome P450 hydroxylase, an important enzyme in brassinosteroid biosynthesis of plants
申请人:Korea Kumho Petrochemical Co. Ltd.
公开号:EP1209227A2
公开(公告)日:2002-05-29
The present invention provides a nucleic acid molecule encoding a dark-inducible cytochrome P450 hydroxylase that catalyzes the brassinosteroid biosynthesis through C-2 hydroxylations in plants. The invention also describes the methods and processes for generating expression cassettes and plasmids and for the use of these expression cassettes and plasmids to synthesize the cytochrome P450 hydroxylase or biologically active fragments of such an enzyme. The invention can be utilized to improve or decrease the stem growth of transgenic plants containing the nucleic acid molecule so that they exhibit improved growth rate and resistance to environmental stress and to identify other proteins involved in the brassinosteroid biosynthesis and in the plant growth regulation.
Plants having improved growth characteristics and methods for making the same
申请人:CropDesign N.V.
公开号:EP2177618A2
公开(公告)日:2010-04-21
The present invention relates generally to the field of molecular biology and concerns a method for improving various plant growth characteristics by modulating expression in a plant of a nucleic acid encoding a GRP (Growth-Related Protein). The present invention also concerns plants having modulated expression of a nucleic acid encoding a GRP, which plants have improved growth characteristics relative to corresponding wild type plants or other control plants. The invention also provides constructs useful in the methods of the invention. The GRP may be one of the following: Seed Yield Regulator (SYR), FG-GAP, CYP90B, CDC27, AT-hook transcription factors, DOF transcription factors and Cyclin Dependent Kinase Inhibitors (CKIs).
Screening method for identifying genes involved in plant cell cycle
申请人:VIB VZM
公开号:EP2527451A1
公开(公告)日:2012-11-28
The present invention relates to a novel method for screening proteins related to and/or involved in plant cell cycle. It further relates to proteins isolated with the method, and the use of those proteins, and/or the genes encoding those proteins for modulating plant yield and plant growth.