Patents by Inventor Theodore B. Davis
Theodore B. Davis 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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Patent number: 11939628Abstract: Methods and compositions are provided for identifying any of the presence, location and phasing of methylated and/or hydroxymethylated cytosines in nucleic acids including long stretches of DNA. In some embodiments, the method may comprise reacting a first portion (aliquot) of a nucleic acid sample with a dioxygenase and optionally a glucosyltransferase in a reaction mixture containing the nucleic acid followed by a reaction with a cytidine deaminase to detect and optionally map 5mC in a DNA. Optionally, a second portion can be reacted with glucosyltransferase followed by reaction with a cytidine deaminase to detect and optionally map 5hmC in a DNA.Type: GrantFiled: February 22, 2021Date of Patent: March 26, 2024Assignee: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Theodore B. Davis, Shengxi Guan, Zhiyi Sun, Laurence Ettwiller, Lana Saleh
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Patent number: 11639498Abstract: This disclosure provides, among other things, a composition comprising: comprising a fusion protein comprising: (a) a DNA polymerase; and (b) a heterologous sequence-specific DNA binding domain. A method for copying a DNA template, as well as a kit for performing the same, are also described.Type: GrantFiled: August 20, 2018Date of Patent: May 2, 2023Assignee: New England Biolabs, Inc.Inventors: Pei-Chung Hsieh, Luo Sun, Thomas C. Evans, Jr., Theodore B. Davis, Andrew F. Gardner
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Publication number: 20210388433Abstract: A method for identifying any of the presence, location and phasing of modified cytosines (C) in long stretches of nucleic acids is provided. In some embodiments, the method may comprise (a) reacting a first portion of a nucleic acid sample containing at least one C and/or at least one modified C with a DNA glucosyltransferase and a cytidine deaminase to produce a first product and/or reacting a second portion of the sample with a dioxygenase, optionally a DNA glucosyltransferase and a cytidine deaminase to produce a second product and; (b) comparing the sequences from the first and optionally the second product obtained in (a), or amplification products thereof, with each other and/or an untreated reference sequence to determine which Cs in the initial nucleic acid fragment are modified. A modified TET methylcytosine dioxygenase with improved efficiency compared to unmodified TET2 at converting methylcytosine to carboxymethylcytosine is also provided.Type: ApplicationFiled: August 17, 2021Publication date: December 16, 2021Applicant: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Zhiyi Sun, Shengxi Guan, Lana Saleh, Laurence Ettwiller, Theodore B. Davis
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Patent number: 11124825Abstract: A method for identifying any of the presence, location and phasing of modified cytosines (C) in long stretches of nucleic acids is provided. In some embodiments, the method may comprise (a) reacting a first portion of a nucleic acid sample containing at least one C and/or at least one modified C with a DNA glucosyltransferase and a cytidine deaminase to produce a first product and/or reacting a second portion of the sample with a dioxygenase, optionally a DNA glucosyltransferase and a cytidine deaminase to produce a second product and; (b) comparing the sequences from the first and optionally the second product obtained in (a), or amplification products thereof, with each other and/or an untreated reference sequence to determine which Cs in the initial nucleic acid fragment are modified. A modified TET methylcytosine dioxygenase with improved efficiency compared to unmodified TET2 at converting methylcytosine to carboxymethylcytosine is also provided.Type: GrantFiled: December 12, 2018Date of Patent: September 21, 2021Assignee: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Zhiyi Sun, Shengxi Guan, Lana Saleh, Laurence Ettwiller, Theodore B. Davis
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Publication number: 20210207200Abstract: Methods and compositions are provided for identifying any of the presence, location and phasing of methylated and/or hydroxymethylated cytosines in nucleic acids including long stretches of DNA. In some embodiments, the method may comprise reacting a first portion (aliquot) of a nucleic acid sample with a dioxygenase and optionally a glucosyltransferase in a reaction mixture containing the nucleic acid followed by a reaction with a cytidine deaminase to detect and optionally map 5mC in a DNA. Optionally, a second portion can be reacted with glucosyltransferase followed by reaction with a cytidine deaminase to detect and optionally map 5hmC in a DNA.Type: ApplicationFiled: February 22, 2021Publication date: July 8, 2021Applicant: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Theodore B. Davis, Shengxi Guan, Zhiyi Sun, Laurence Ettwiller, Lana Saleh
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Patent number: 11001876Abstract: Methods and compositions are provided for identifying any of the presence, location and phasing of methylated and/or hydroxymethylated cytosines in nucleic acids including long stretches of DNA. In some embodiments, the method may comprise reacting a first portion (aliquot) of a nucleic acid sample with a dioxygenase and optionally a glucosyltransferase in a reaction mixture containing the nucleic acid followed by a reaction with a cytidine deaminase to detect and optionally map 5mC in a DNA. Optionally, a second portion can be reacted with glucosyltransferase followed by reaction with a cytidine deaminase to detect and optionally map 5hmC in a DNA.Type: GrantFiled: February 27, 2019Date of Patent: May 11, 2021Assignee: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Theodore B. Davis, Shengxi Guan, Zhiyi Sun, Laurence Ettwiller, Lana Saleh
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Patent number: 10619200Abstract: A method for identifying the location and phasing of modified cytosines (C) in long stretches of nucleic acids is provided. In some embodiments, the method may comprise (a) reacting a first portion of a nucleic acid sample containing at least one C and/or at least one modified C with a DNA glucosyltransferase and a cytidine deaminase to produce a first product and optionally reacting a second portion of the sample with a dioxygenase and a cytidine deaminase to produce a second product and; (b) comparing the sequences from the first and optionally the second product obtained in (a), or amplification products thereof, with each other and/or an untreated reference sequence to determine which Cs in the initial nucleic acid fragment are modified. A modified TET methylcytosine dioxygenase that is more efficient at converting methylcytosine to carboxymethylcytosine is also provided.Type: GrantFiled: October 28, 2016Date of Patent: April 14, 2020Assignee: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Zhiyi Sun, Shengxi Guan, Lana Saleh, Laurence Ettwiller, Theodore B. Davis
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Publication number: 20190185919Abstract: Methods and compositions are provided for identifying any of the presence, location and phasing of methylated and/or hydroxymethylated cytosines in nucleic acids including long stretches of DNA. In some embodiments, the method may comprise reacting a first portion (aliquot) of a nucleic acid sample with a dioxygenase and optionally a glucosyltransferase in a reaction mixture containing the nucleic acid followed by a reaction with a cytidine deaminase to detect and optionally map 5mC in a DNA.Type: ApplicationFiled: February 27, 2019Publication date: June 20, 2019Applicant: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Theodore B. Davis, Shengxi Guan, Zhiyi Sun, Laurence Ettwiller, Lana Saleh
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Patent number: 10260088Abstract: Methods and compositions are provided for identifying any of the presence, location and phasing of methylated and/or hydroxymethylated cytosines in nucleic acids including long stretches of DNA. In some embodiments, the method may comprise reacting a first portion (aliquot) of a nucleic acid sample with a dioxygenase and optionally a glucosyltransferase in a reaction mixture containing the nucleic acid followed by a reaction with a cytidine deaminase to detect and optionally map 5mC in a DNA. Optionally, a second portion can be reacted with glucosyltransferase followed by reaction with a cytidine deaminase to detect and optionally map 5hmC in a DNA.Type: GrantFiled: February 9, 2018Date of Patent: April 16, 2019Assignee: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Theodore B. Davis, Shengxi Guan, Zhiyi Sun, Laurence Ettwiller, Lana Saleh
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Publication number: 20190100796Abstract: A method for identifying any of the presence, location and phasing of modified cytosines (C) in long stretches of nucleic acids is provided. In some embodiments, the method may comprise (a) reacting a first portion of a nucleic acid sample containing at least one C and/or at least one modified C with a DNA glucosyltransferase and a cytidine deaminase to produce a first product and/or reacting a second portion of the sample with a dioxygenase, optionally a DNA glucosyltransferase and a cytidine deaminase to produce a second product and; (b) comparing the sequences from the first and optionally the second product obtained in (a), or amplification products thereof, with each other and/or an untreated reference sequence to determine which Cs in the initial nucleic acid fragment are modified. A modified TET methylcytosine dioxygenase with improved efficiency compared to unmodified TET2 at converting methylcytosine to carboxymethylcytosine is also provided.Type: ApplicationFiled: December 12, 2018Publication date: April 4, 2019Applicant: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Zhiyi Sun, Shengxi Guan, Lana Saleh, Laurence Ettwiller, Theodore B. Davis
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Patent number: 10227646Abstract: A method for identifying any of the presence, location and phasing of modified cytosines (C) in long stretches of nucleic acids is provided. In some embodiments, the method may comprise (a) reacting a first portion of a nucleic acid sample containing at least one C and/or at least one modified C with a DNA glucosyltransferase and a cytidine deaminase to produce a first product and/or reacting a second portion of the sample with a dioxygenase, optionally a DNA glucosyltransferase and a cytidine deaminase to produce a second product and; (b) comparing the sequences from the first and optionally the second product obtained in (a), or amplification products thereof, with each other and/or an untreated reference sequence to determine which Cs in the initial nucleic acid fragment are modified. A modified TET methylcytosine dioxygenase with improved efficiency compared to unmodified TET2 at converting methylcytosine to carboxymethylcytosine is also provided.Type: GrantFiled: February 24, 2017Date of Patent: March 12, 2019Assignee: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Zhiyi Sun, Shengxi Guan, Lana Saleh, Laurence Ettwiller, Theodore B. Davis
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Publication number: 20180355328Abstract: This disclosure provides, among other things, a composition comprising: comprising a fusion protein comprising: (a) a DNA polymerase; and (b) a heterologous sequence-specific DNA binding domain. A method for copying a DNA template, as well as a kit for performing the same, are also described.Type: ApplicationFiled: August 20, 2018Publication date: December 13, 2018Applicant: New England Biolabs, Inc.Inventors: Pei-Chung Hsieh, Luo Sun, Thomas C. Evans, JR., Theodore B. Davis, Andrew F. Gardner
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Publication number: 20180312914Abstract: A method for identifying the location and phasing of modified cytosines (C) in long stretches of nucleic acids is provided. In some embodiments, the method may comprise (a) reacting a first portion of a nucleic acid sample containing at least one C and/or at least one modified C with a DNA glucosyltransferase and a cytidine deaminase to produce a first product and optionally reacting a second portion of the sample with a dioxygenase and a cytidine deaminase to produce a second product and; (b) comparing the sequences from the first and optionally the second product obtained in (a), or amplification products thereof, with each other and/or an untreated reference sequence to determine which Cs in the initial nucleic acid fragment are modified. A modified TET methylcytosine dioxygenase that is more efficient at converting methylcytosine to carboxymethylcytosine is also provided.Type: ApplicationFiled: October 28, 2016Publication date: November 1, 2018Applicant: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Zhiyi Sun, Shengxi Guan, Lana Saleh, Laurence Ettwiller, Theodore B. Davis
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Patent number: 10081799Abstract: This disclosure provides, among other things, a composition comprising: comprising a fusion protein comprising: (a) a DNA polymerase; and (b) a heterologous sequence-specific DNA binding domain. A method for copying a DNA template, as well as a kit for performing the same, are also described.Type: GrantFiled: February 14, 2017Date of Patent: September 25, 2018Assignee: New England Biolabs, Inc.Inventors: Pei-Chung Hsieh, Luo Sun, Thomas C. Evans, Jr., Theodore B. Davis, Andrew Gardner
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Patent number: 10041051Abstract: This disclosure provides, among other things, a composition comprising: comprising a fusion protein comprising: (a) a DNA polymerase; and (b) a heterologous sequence-specific DNA binding domain. A method for copying a DNA template, as well as a kit for performing the same, are also described.Type: GrantFiled: February 14, 2017Date of Patent: August 7, 2018Assignee: New England Biolabs, Inc.Inventors: Pei-Chung Hsieh, Luo Sun, Thomas C. Evans, Jr., Theodore B. Davis, Andrew Gardner
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Publication number: 20180216098Abstract: This disclosure provides, among other things, a composition comprising: a 5? exonuclease; a strand-displacing polymerase; and optionally a single strand DNA binding protein and/or a ligase. A method for polynucleotide assembly to form a synthon, as well as a kit for performing the same, are also described.Type: ApplicationFiled: August 27, 2015Publication date: August 2, 2018Applicant: New England Biolabs, Inc.Inventors: Pei-Chung Hsieh, Luo Sun, Thomas C. Evans, Jr., Theodore B. Davis, Andrew Gardner
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Publication number: 20180171397Abstract: Methods and compositions are provided for identifying any of the presence, location and phasing of methylated and/or hydroxymethylated cytosines in nucleic acids including long stretches of DNA. In some embodiments, the method may comprise reacting a first portion (aliquot) of a nucleic acid sample with a dioxygenase and optionally a glucosyltransferase in a reaction mixture containing the nucleic acid followed by a reaction with a cytidine deaminase to detect and optionally map 5mC in a DNA. Optionally, a second portion can be reacted with glucosyltransferase followed by reaction with a cytidine deaminase to detect and optionally map 5hmC in a DNA.Type: ApplicationFiled: February 9, 2018Publication date: June 21, 2018Applicant: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Theodore B. Davis, Shengxi Guan, Zhiyi Sun, Laurence Ettwiller, Lana Saleh
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Patent number: 9963687Abstract: This disclosure provides, among other things, a composition comprising: comprising a fusion protein comprising: (a) a DNA polymerase; and (b) a heterologous sequence-specific DNA binding domain. A method for copying a DNA template, as well as a kit for performing the same, are also described.Type: GrantFiled: February 17, 2016Date of Patent: May 8, 2018Assignee: New England Biolabs, Inc.Inventors: Pei-Chung Hsieh, Luo Sun, Thomas C. Evans, Jr., Theodore B. Davis, Andrew Gardner
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Patent number: 9896726Abstract: Compositions and methods are provided for discrimination between cytosine and modifications thereof using cytidine deaminases and/or oxygenases. Variants of wild type cytidine deaminases are described which show reduced bias with respect to adjacent nucleotides upstream of the cytosine. The methods provide a rapid and convenient use of enzymes to obtain methylomes.Type: GrantFiled: July 22, 2015Date of Patent: February 20, 2018Assignee: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Heidi E. Johnson, Saulius Vainauskas, Theodore B. Davis
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Publication number: 20170198344Abstract: A method for identifying any of the presence, location and phasing of modified cytosines (C) in long stretches of nucleic acids is provided. In some embodiments, the method may comprise (a) reacting a first portion of a nucleic acid sample containing at least one C and/or at least one modified C with a DNA glucosyltransferase and a cytidine deaminase to produce a first product and/or reacting a second portion of the sample with a dioxygenase, optionally a DNA glucosyltransferase and a cytidine deaminase to produce a second product and; (b) comparing the sequences from the first and optionally the second product obtained in (a), or amplification products thereof, with each other and/or an untreated reference sequence to determine which Cs in the initial nucleic acid fragment are modified. A modified TET methylcytosine dioxygenase with improved efficiency compared to unmodified TET2 at converting methylcytosine to carboxymethylcytosine is also provided.Type: ApplicationFiled: February 24, 2017Publication date: July 13, 2017Applicant: New England Biolabs, Inc.Inventors: Romualdas Vaisvila, Zhiyi Sun, Shengxi Guan, Lana Saleh, Laurence Ettwiller, Theodore B. Davis