Patents by Inventor Ralph E. Dewey
Ralph E. Dewey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240122151Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in tobacco plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for a root-specific nicotine demethylases, CYP82E10, and variants thereof, that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Compositions of the invention also include tobacco plants, or plant parts thereof, comprising a mutation in a gene encoding a CYP82E10 nicotine demethylase, wherein the mutation results in reduced expression or function of the CYP82E10 nicotine demethylase. Seed of these tobacco plants, or progeny thereof, and tobacco products prepared from the tobacco plants of the invention, or from plant parts or progeny thereof, are also provided. Methods for reducing the level of nornicotine, or reducing the rate of conversion of nicotine to nornicotine, in a tobacco plant, or plant part thereof are also provided.Type: ApplicationFiled: December 21, 2023Publication date: April 18, 2024Applicant: North Carolina State UniversityInventors: Ralph E. Dewey, Ramsey S. Lewis
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Publication number: 20240081210Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: ApplicationFiled: September 12, 2023Publication date: March 14, 2024Inventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Patent number: 11877556Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in tobacco plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for a root-specific nicotine demethylases, CYP82E10, and variants thereof, that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Compositions of the invention also include tobacco plants, or plant parts thereof, comprising a mutation in a gene encoding a CYP82E10 nicotine demethylase, wherein the mutation results in reduced expression or function of the CYP82E10 nicotine demethylase. Seed of these tobacco plants, or progeny thereof, and tobacco products prepared from the tobacco plants of the invention, or from plant parts or progeny thereof, are also provided. Methods for reducing the level of nornicotine, or reducing the rate of conversion of nicotine to nornicotine, in a tobacco plant, or plant part thereof are also provided.Type: GrantFiled: March 7, 2022Date of Patent: January 23, 2024Assignee: North Carolina State UniversityInventors: Ralph E. Dewey, Ramsey S. Lewis
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Patent number: 11807859Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: GrantFiled: March 1, 2022Date of Patent: November 7, 2023Assignees: North Carolina State University, University of Kentucky Research FoundationInventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Publication number: 20230323377Abstract: The present invention relates to modifications of berberine bridge enzyme-like nucleic acids and their use in modulation of nicotine biosynthesis in plants.Type: ApplicationFiled: June 27, 2023Publication date: October 12, 2023Inventors: Ralph E. Dewey, Ramsey S. Lewis
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Patent number: 11778965Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: GrantFiled: September 22, 2021Date of Patent: October 10, 2023Assignees: North Carolina State University, University of Kentucky Research FoundationInventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Patent number: 11753649Abstract: The present invention relates to modifications of berberine bridge enzyme-like nucleic acids and their use in modulation of nicotine biosynthesis in plants.Type: GrantFiled: November 22, 2021Date of Patent: September 12, 2023Assignee: North Carolina State UniversityInventors: Ralph E. Dewey, Ramsey S. Lewis
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Publication number: 20230029171Abstract: The present invention relates to tobacco products from plants comprising mutated berberine bridge enzyme-like nucleic acids and the recessive nic1 and/or nic2 alleles and methods of making the same.Type: ApplicationFiled: January 8, 2021Publication date: January 26, 2023Inventors: Ramsey S. Lewis, Ralph E Dewey, Juan Sanchez Tamburrino
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Publication number: 20220340920Abstract: The present invention relates to modifications of berberine bridge enzyme-like nucleic acids and their use in modulation of nicotine biosynthesis in plants.Type: ApplicationFiled: November 22, 2021Publication date: October 27, 2022Inventors: Ralph E. Dewey, Ramsey S. Lewis
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Publication number: 20220275388Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: ApplicationFiled: March 1, 2022Publication date: September 1, 2022Applicants: North Carolina State University, University of Kentucky Research FoundationInventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Patent number: 11399500Abstract: The present disclosure provides tobacco inbred plants TN90 SRC, CMS TN90 SRC, KY14 SRC, CMS KY14 SRC, L8 SRC, NC775 SRC, CMS NC775 SRC, NC645 SRC, NC638 SRC, CMS NC638 SRC, TN86 SRC, and CMS TN86 SRC, and hybrids KY14 X L8 SRC, NC7 SRC, and NCBH129 SRC. The present disclosure also provides parts of such plants and products made from those parts. The present disclosure also includes progeny of the provided plants including hybrids.Type: GrantFiled: June 30, 2020Date of Patent: August 2, 2022Assignee: NORTH CAROLINA STATE UNIVERSITYInventors: Ramsey S. Lewis, Ralph E. Dewey
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Publication number: 20220225590Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in tobacco plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for a root-specific nicotine demethylases, CYP82E10, and variants thereof, that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Compositions of the invention also include tobacco plants, or plant parts thereof, comprising a mutation in a gene encoding a CYP82E10 nicotine demethylase, wherein the mutation results in reduced expression or function of the CYP82E10 nicotine demethylase. Seed of these tobacco plants, or progeny thereof, and tobacco products prepared from the tobacco plants of the invention, or from plant parts or progeny thereof, are also provided. Methods for reducing the level of nornicotine, or reducing the rate of conversion of nicotine to nornicotine, in a tobacco plant, or plant part thereof are also provided.Type: ApplicationFiled: March 7, 2022Publication date: July 21, 2022Applicant: North Carolina State UniversityInventors: Ralph E. Dewey, Ramsey S. Lewis
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Patent number: 11304395Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in tobacco plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for a root-specific nicotine demethylases, CYP82E10, and variants thereof, that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Compositions of the invention also include tobacco plants, or plant parts thereof, comprising a mutation in a gene encoding a CYP82E10 nicotine demethylase, wherein the mutation results in reduced expression or function of the CYP82E10 nicotine demethylase. Seed of these tobacco plants, or progeny thereof, and tobacco products prepared from the tobacco plants of the invention, or from plant parts or progeny thereof, are also provided. Methods for reducing the level of nornicotine, or reducing the rate of conversion of nicotine to nornicotine, in a tobacco plant, or plant part thereof are also provided.Type: GrantFiled: May 7, 2020Date of Patent: April 19, 2022Assignee: North Carolina State UniversityInventors: Ralph E. Dewey, Ramsey S. Lewis
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Patent number: 11293031Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: GrantFiled: April 28, 2020Date of Patent: April 5, 2022Assignees: North Carolina State University, University of Kentucky Research FoundationInventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Publication number: 20220000055Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: ApplicationFiled: September 22, 2021Publication date: January 6, 2022Applicant: University of Kentucky Research FoundationInventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Patent number: 11214813Abstract: The present invention relates to modifications of berberine bridge enzyme-like nucleic acids and their use in modulation of nicotine biosynthesis in plants.Type: GrantFiled: January 31, 2020Date of Patent: January 4, 2022Assignee: NORTH CAROLINA STATE UNIVERSITYInventors: Ralph E. Dewey, Ramsey S. Lewis
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Patent number: 11140843Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: GrantFiled: July 15, 2019Date of Patent: October 12, 2021Assignees: North Carolina State University, University of Kentucky Research FoundationInventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Publication number: 20210045310Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in Nicotiana plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for cytochrome P450s that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Expression cassettes, vectors, plants, and plant parts thereof comprising inhibitory sequences that target expression or function of the disclosed cytochrome P450 polypeptides are also provided. Methods for the use of these novel sequences to inhibit expression or function of cytochrome P450 polypeptides involved in this metabolic conversion are also provided. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.Type: ApplicationFiled: April 28, 2020Publication date: February 18, 2021Applicant: University of Kentucky Research FoundationInventors: Ralph E. Dewey, Balazs Siminszky, Steven W. Bowen, Lily Gavilano
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Publication number: 20200359588Abstract: The present disclosure provides tobacco inbred plants TN90 SRC, CMS TN90 SRC, KY14 SRC, CMS KY14 SRC, L8 SRC, NC775 SRC, CMS NC775 SRC, NC645 SRC, NC638 SRC, CMS NC638 SRC, TN86 SRC, and CMS TN86 SRC, and hybrids KY14 X L8 SRC, NC7 SRC, and NCBH129 SRC. The present disclosure also provides parts of such plants and products made from those parts. The present disclosure also includes progeny of the provided plants including hybrids.Type: ApplicationFiled: June 30, 2020Publication date: November 19, 2020Inventors: Ramsey S. Lewis, Ralph E. Dewey
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Publication number: 20200344967Abstract: Compositions and methods for reducing the level of nornicotine and N?-nitrosonornicotine (NNN) in tobacco plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for a root-specific nicotine demethylases, CYP82E10, and variants thereof, that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Compositions of the invention also include tobacco plants, or plant parts thereof, comprising a mutation in a gene encoding a CYP82E10 nicotine demethylase, wherein the mutation results in reduced expression or function of the CYP82E10 nicotine demethylase. Seed of these tobacco plants, or progeny thereof, and tobacco products prepared from the tobacco plants of the invention, or from plant parts or progeny thereof, are also provided. Methods for reducing the level of nornicotine, or reducing the rate of conversion of nicotine to nornicotine, in a tobacco plant, or plant part thereof are also provided.Type: ApplicationFiled: May 7, 2020Publication date: November 5, 2020Applicant: North Carolina State UniversityInventors: Ralph E. Dewey, Ramsey S. Lewis