101 results about "Antisense Orientation" patented technology

Regulation of expression of programmed cell death, including senescence, in plants is achieved by integration of a gene or gene fragment encoding senescence-induced deoxyhypusine synthase, senescence-induced eIF-5A or both into the plant genome in antisense orientation. Plant genes encoding senescence-induced deoxyhypusine synthase and senescence-induced eIF-5A are identified and the nucleotide sequences of each, alone and in combination are used to modify senescence in transgenic plants.

Genes encoding an apoptosis-induced eukaryotic initiation Factor-5A (eIF-5A) and an apoptosis-induced deoxyhypusine synthase (DHS), whose expressions are induced by the onset of apoptosis, are identified. The DHS gene and the eIF-5A gene, alone or in combination, as well as inhibitors of the DHS reaction, are used to modulate apoptosis in animals and humans. For example, modulation of apoptosis in cells of animals and humans is achieved by introduction of a gene or gene fragment encoding apoptosis-induced eIF-5A, apoptosis-induced DHS, or both into the animal or human cell in antisense orientation.

This invention relates to an isolated nucleic acid fragment encoding a galactinol synthase. The invention also relates to the construction of a chimeric gene encoding all or a portion of the galactinol synthase, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the galactinol synthase in a transformed host cell.

Methods for transforming forage legumes or woody plants with a DNA construct comprising at least one open reading frame encoding for a caffeoyl CoA 3-O-methyltransferase enzyme or a Medicago sativa caffeic acid 3-O-methyltransferase enzyme or a fragment thereof in either a sense or antisense orientation under a lignification-associated tissue specific promoter have been found, resulting in the down-regulation of the corresponding homologous gene either through antisense inhibition or sense suppression, as well as reduced lignin content and modified lignin composition in the transgenic plants. The expression of the caffeoyl CoA 3-O-methyltransferase transgene produces an increased syringyl lignin to guaiacyl lignin ratio in the transformed plant, and greatly improved forage digestibility.

This invention relates to an isolated polynucleotide encoding a cytochrome P450 monooxygenase that in the presence of linoleic acid results in production of 1-octen-3-ol. The invention also relates to the construction of a recombinant DNA construct comprising all or a portion of the polynucleotide encoding the cytochrome P450 monooxygenases of the invention, in sense or antisense orientation, wherein expression of the recombinant DNA construct results in production of altered levels 1-octen-3-ol in a transformed host cell.

Alfin1 cDNA encodes a putative transcription factor associated with salt tolerance in alfalfa (Medicago sativa L). The recombinant protein binds DNA in a sequence specific manner, including promoter fragments of the salt inducible gene MsPRP2. Alfin1 function was tested in transgenic alfalfa under the control of the 35S promoter in the sense and antisense orientations with the endogenous MsPRP2 as a reporter gene. Calli overexpressing Alfin1 were more resistant to growth inhibition by 171 mM NaCl than vector transformed controls, while calli expressing Alfin1 antisense were more sensitive to salt inhibition. Transgenic plants overexpressing Alfin1 in the sense orientation grew well. In contrast, the antisense transgenic plants grew poorly in soil, demonstrating that Alfin1 expression is essential for normal plant development. Transgenic calli and plant roots overexpressing Alfin1 showed enhanced levels of endogenous MsPRP2 mRNA accumalution. However, MsPRP2 mRNA accumulation was also regulated in a tissue specific manner as shown in leaves of transgenics overexpressing Alfin1. These results suggest that Alfin1 acts as a transcriptional regulator in plants and MsPRP2 expression in alfalfa. Alfin1 overexpressing transgenics showed salinity tolerance comparable to one of our salt-tolerant plants, indicating that Alfin1 also functions in gene regulation in salt tolerance.

This invention relates to isolated nucleic acid fragments encoding trehalose metabolism enzymes, more specifically, alpha, alpha-trehalase, alpha, alpha-trehalose-phosphate synthase or trehalose-6-phosphate phosphatase. The invention also relates to the construction of a recombinant DNA construct encoding all or a portion of the alpha, alpha-trehalase, alpha, alpha-trehalose-phosphate synthase or trehalose-6-phosphate phosphatase, in sense or antisense orientation, wherein expression of the recombinant DNA construct results in production of altered levels of the alpha, alpha-trehalase, alpha, alpha-trehalose-phosphate synthase or trehalose-6-phosphate phosphatase in a transformed host cell.

Disclosed are methods and compositions for the selective manipulation of gene expression through the preparation of retroviral expression vectors for expressing antisense sequences, such as K-ras oncogene antisense sequences, or sequences encoding a desired product, such as wild type p53 sequences. Preferred retroviral vectors of the present invention incorporate the β-actin promoter in a reverse orientation with respect to retroviral transcription. Preferred antisense RNA constructs of the present invention employ the use of antisense intron DNA corresponding to distinct intron regions of the gene whose expression is targeted for down-regulation. In an exemplary embodiment, a human lung cancer cell line (NCI-H460a) with a homozygous spontaneous K-ras mutation was transfected with a recombinant plasmid that synthesizes a genomic segment of K-ras in antisense orientation. Translation of the mutated K-ras mRNA was specifically inhibited, whereas expression of H-ras and N-ras was unchanged. A three-fold growth inhibition occurred in H460a cells when expression of the mutated ras p21 protein was down-regulated by antisense RNA and cells remained viable. The growth of H460a tumors in nu/nu mice was substantially reduced by expressed K-ras antisense RNA.

This invention relates to isolated polynucleotides encoding BRITTLE STALK 2-like (Bk2L) family polypeptides. The invention also relates to the construction of a chimeric gene encoding all or a portion of a Bk2L polypeptide, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the Bk2L polypeptide in a transformed host cell.

This invention relates to isolated nucleic acid fragments encoding 5,10-methylenetetrahydrofolate reductase. The invention also relates to the construction of a recombinant DNA construct encoding all or a portion of the 5,10-methylenetetrahydrofolate reductase in sense or antisense orientation, wherein expression of the recombinant DNA construct results in production of altered levels of the 5,10-methylenetetrahydrofolate reductase in a transformed host cell.

This invention relates to an isolated nucleic acid sequence encoding isoflavone synthase. The invention also relates to the construction of chimeric sequences encoding all or a substantial portion of the enzymes, in sense or antisense orientation, wherein expression of the chimeric sequence results in production of altered levels of the enzyme in a transformed host cell.

The invention is drawn to plant cell transformation with a nucleic acid construct comprising a prokaryotic ammonium-specific asparagine synthetase, type A, coding sequence, operably linked to a chloroplast transit peptide-encoding sequence, wherein said plant cells also contain a nucleic acid construct comprising a chloroplastic glutamine synthetase coding sequence in antisense orientation. Plant cells containing both nucleic acid constructs, and plants regenerated therefrom, exhibit improved growth characteristics.

This invention relates to an isolated nucleic acid fragment encoding a transcription factor. The invention also relates to the construction of a chimeric gene encoding all or a portion of the transcription factor, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of accumulated oil in a transformed host cell.

This invention relates to an isolated nucleic acid fragment encoding floral development proteins, more specifically FT, TFL or Ap3 homologs. The invention also relates to the construction of a recombinant DNA construct encoding all or a portion of the floral development proteins, in sense or antisense orientation, wherein expression of the recombinant DNA construct results in production of altered levels of the FT, TFL or Ap3 homologs in a transformed host cell.

A transgenic plant or tree of Malus sp. comprising tissue derived from cells transformed with a nucleic acid molecule encoding a gametophytic S-RNAse from Malus sp. is provided. The nucleic acid molecule encoding a gametophytic S-RNAase is in a sense or antisense orientation relative to a regulatory region operably linked thereto. The regulatory region controls expression of the nucleic acid molecule, and the transgenic plant or tree exhibits self-compatibility compared to a corresponding non-transformed plant or tree.

This invention relates to an isolated nucleic acid fragment encoding scorpion toxins that are K-channel agonists. The invention also relates to the construction of a chimeric gene encoding all or a portion of the K-channel agonists, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the K-channel agonists in a transformed host cell.

This invention relates to an isolated nucleic acid fragment encoding a lignin biosynthetic enzyme. The invention also relates to the construction of a chimeric gene encoding all or a portion of the lignin biosynthetic enzyme, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the lignin biosynthetic enzyme in a transformed host cell.

This invention relates to isolated nucleic acid fragments encoding all or a substantial portion of a corn pullulanase. The invention also relates to the construction of chimeric genes encoding all or a portion of a corn pullulanase, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of corn pullulanase in a transformed host cell.