Detection of 1,2-hydride shifts in the formation of euph-7-ene by the squalene–tetrahymanol cyclase of Tetrahymena pyriformis
作者:José-Luis GinerCurrent address: Department of、Stefano Rocchetti、Serge Neunlist、Michel Rohmer、Duilio Arigoni
DOI:10.1039/b504300j
日期:——
Tetrahymena pyriformis, containing a squalene-tetrahymanol cyclase, provided specimens of euph-7-enes displaying deuterium patterns consistent with the biosynthetic operation of two consecutive 1,2-hydrideshifts.
Delta 7 and delta 22 cholesterol desaturases from ciliata phylum, and uses
申请人:Valcarce, German A.
公开号:EP1251167A2
公开(公告)日:2002-10-23
A cell free extract from a ciliate microorganism, including protozoo Tetrahymena, wherein the extract comprises a homogenate a microsomal fraction, a desaturaseenriched fraction or a mixture thereof and, more particularly the invention provides substantially pure enzymes: Δ7 cholesterol desaturases and Δ22 cholesterol desaturase enzymes.
The present invention provides methods for decreasing the cholesterol content of a foodstuff of animal origin, such as a dairy product. The methods comprise the step of treating a foodstuff by incubating the same with a cell free extract in a effective amount to enable changes in the foodstuff: (a)reduce the level of cholesterol; and (b) increase the level of at least one desaturated cholesterol derivative: Δ7- dehydrocholesterol, Δ22 dehydrocholesterol and/or Δ7,22 bisdehydrocholesterol.
The invention also relates to methods for recovering cholesterol desaturases activities from ciliates, including Tetrahymena, and their use in a production of Δ7 dehydrosterol, Δ22 dehydrosterol and Δ7,22 bis dehydrosterol from several sterol sources as cholesterol.
Genetically modified organisms for the production of lipids
申请人:OrganoBalance GmbH
公开号:EP2292741A1
公开(公告)日:2011-03-09
The invention provides an isolated genetically modified non-mammalian organism, wherein the activity of acyl-CoA:sterol acyltransferase/sterol O-acyltransferase (EC 2.3.1.26) and/or diacylglycerol acyltransferase/diacylglycerol O-acyltranferase (EC 2.3.1.20) and/or lecithin cholesterol acyl transferase/phospholipid: diacylglycerol acyltransferase (EC 2.3.1.158) and/or acyl CoA-wax alcohol acyltransferase (EC 2.3.1.75) is reduced or abolished in comparison with a corresponding wildtype organism, methods of use of such an organism, shuttle vehicles for making such an organism and methods for producing such an organism.
Hopanoids producing bacteria and related biofertilizers, compositions, methods and systems
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US10131585B2
公开(公告)日:2018-11-20
Hopanoids, hopanoids-producing nitrogen-fixing bacteria, and related formulations, systems and methods are described herein. In particular, hopanoids alone or in combination with hopanoid-producing nitrogen-fixing bacteria can be used as biofertilizer to stimulate plant growth and yield with enhanced tolerance to diverse stresses found in plant-microbe symbiotic microenvironments.
Methods for treating foodstuffs using cell free extracts from ciliates
申请人:——
公开号:US20020009519A1
公开(公告)日:2002-01-24
The present invention provides methods for: (a) concentrating cholesterol-desaturase activity in a cell free extract, wherein the cell free extract can be a homogenate fraction, a microsomal fraction or a desaturase-enriched fraction from a Tetrahymenidae family microorganism and (b) decreasing the cholesterol content of a foodstuff of animal origin, such as a dairy product. The methods comprise the step of treating a foodstuff by incubating the same with a cell free extract in a effective amount to enable changes in the foodstuff: (a) reduce the level of cholesterol; and (b) increase the level of at least one desaturated cholesterol derivative: &Dgr;7 dehydrocholesterol, &Dgr;22 dehydrocholesterol and/or &Dgr;7,22 bisdehydrocholesterol.