Abstract:
The invention is directed to methods for manipulating the level of phytosterol-related compounds in a plant organism and especially for increasing the Avenasterol content in the seed.
Abstract:
The present invention provides genetically modified eukaryotic host cells that produce isoprenoid precursors or isoprenoid compounds. A subject genetically modified host cell comprises increased activity levels of one or more of mevalonate pathway enzymes, increased levels of prenyltransferase activity, and decreased levels of squalene synthase activity. Methods are provided for the production of an isoprenoid compound or an isoprenoid precursor in a subject genetically modified eukaryotic host cell. The methods generally involve culturing a subject genetically modified host cell under conditions that promote production of high levels of an isoprenoid or isoprenoid precursor compound.
Abstract:
Disclosed are constructs comprising sequences encoding 3-hydroxy-3methylglutaryl-Coenzyme A reductase and at least one other sterol synthesis pathway enzyme. Also disclosed are methods for using such constructs to alter sterol production and content in cells, plants, seeds and storage organs of plants. Also provided are oils and compositions containing altered sterol levels produced by use of the disclosed constructs. Novel nucleotide sequences useful in the alteration of sterol production are also provided. Also provided are cells, plants, seeds and storage organs of plants comprising sequences encoding 3-hydroxy-3methylglutaryl-Coenzyme A reductase, at least one other sterol synthesis pathway enzyme and at least one tocopherol synthesis enzyme.
Abstract:
This application describes methods, including non-naturally occurring methods, for biosynthesizing unsaturated pentahydrocarbons, such as isoprene and intermediates thereof, via the mevalonate pathway, as well as non-naturally occurring hosts for producing isoprene.
Abstract:
Described is a method for the production of 3-buten-2-one comprising the enzymatic conversion of 4-hydroxy-2-butanone into 3-buten-2-one by making use of an enzyme catalyzing 4-hydroxy-2-butanone dehydration, wherein said enzyme catalyzing 4-hydroxy-2-butanone dehydration is (a) a 3-hydroxypropiony-CoA dehydratase (EC 4.2.1.116), (b) a 3-hydroxybutyryl-CoA dehydratase (EC 4.2.1.55), (c) an enoyl-CoA hydratase (EC 4.2.1.17), (d) a 3-hydroxyoctanoyl-[acyl-carrier-protein] dehydratase (EC 4.2.1.59), (e) a crotonyl-[acyl-carrier-protein] hydratase (EC 4.2.1.58), (f) a 3-hydroxydecanoyl-[acyl-carrier-protein] dehydratase (EC 4.2.1.60), (g) a 3-hydroxypalmitoyl-[acyl-carrier-protein] dehydratase (EC 4.2.1.61 ), (h) a long-chain-enoyl-CoA hydratase (EC 4.2.1.74), or (i) a 3-methylglutaconyl-CoA hydratase (EC 4.2.1.18). The produced 3-buten-2-one can be further converted into 3-buten-2-ol and finally into 1,3-butadiene.
Abstract:
The present invention discloses an isolated polynucleotide encoding an enzyme for catalyzing cytosolic biosynthesis of isopentenyl diphosphate, dimefhylallyl diphosphate or the combination thereof in the plant of Hevea brasiliensis , comprising nucleotide sequence set forth in SEQ ID NO. 1, SEQ ID NO. 3, SEQ ID NO. 5, SEQ ID NO. 7, SEQ' ID NO. 9 or any complementary sequence thereof; and a method for enhancing cytoplasmic availability and functionality of the enzyme, comprising the steps of predicting catalytic domain, signal peptide or membrane-spanning domain of the enzyme; introducing a point mutation to the predicted catalytic domain, signal peptide or membrane-spanning transmembrane domain; and expressing the mutated catalytic domain, signal peptide or membrane-spanning transmembrane domain in a plant cell, tissue or organ of Hevea brasiliensis . The present invention also relates to an isolated polypeptide encoded by the polynucleotide, a recombinant gene construct comprising the polynucleotide, a transformant and a transgenic plant comprising the recombinant gene construct, with enhanced production of cytosolic isoprenoid towards rubber production.
Abstract translation:本发明公开了一种分离的多核苷酸,其编码用于催化异二烯基二磷酸,二烯丙基二磷酸或其组合的细胞质生物合成的酶,其包含在SEQ ID NO。 1,SEQ ID NO: 3,SEQ ID NO: 5,SEQ ID NO: 7,SEQ ID NO: 9或其任何互补序列; 以及用于增强酶的细胞质可用性和功能的方法,包括预测酶的催化结构域,信号肽或跨膜结构域的步骤; 对预测的催化结构域,信号肽或跨膜跨膜结构域引入点突变; 并在巴西三叶草的植物细胞,组织或器官中表达突变的催化结构域,信号肽或跨膜跨膜结构域。 本发明还涉及由多核苷酸编码的分离的多肽,包含多核苷酸的重组基因构建体,转化体和包含重组基因构建体的转基因植物,其具有增强的产生细胞质类异戊二烯用于橡胶生产的功能。
Abstract:
Provided herein are methods and compositions useful for detecting the production of compounds in a cell, for example, a microbial cell genetically modified to produce one or more such compounds at greater yield and/or with increased persistence compared to a parent microbial cell that is not genetically modified. In some embodiments, the methods comprise contacting a solution with a fluorescent dye that directly binds the recombinantly produced compound, wherein the solution comprises a plurality of cells recombinantly producing the compound; and detecting the fluorescent dye under spectral conditions suitable for the selective detection of the fluorescent dye bound to the recombinantly produced compound.
Abstract:
Isolated polynucleotides encoding polypeptides having the activity of enzymes in the mevalonate pathway, e.g. hydroxymethylglutaryl-CoA reductase, isopetenyl diphosphate isomerase, hydroxymethylglutaryl-CoA synthase, mevolante kinase, phosphomevalonate kinase, or diphosphomevalonate decarboxylase; are provided, useful for recombinantly producing isoprenoid compounds such as carotenoids like phytoene, lycopene, β-carotene, zeaxanthin, canthaxanthin, astaxanthin, adonixanthin, cryptoxanthin, echinenone and adonirubin. Expression vectors, cultured cells, and methods of making isoprenoid compounds are also provided.