skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: DHAD variants and methods of screening

Patent ·
OSTI ID:1568323

Methods of screening for dihydroxy-acid dehydratase (DHAD) variants that display increased DHAD activity are disclosed, along with DHAD variants identified by these methods. Such enzymes can result in increased production of compounds from DHAD requiring biosynthetic pathways. Also disclosed are isolated nucleic acids encoding the DHAD variants, recombinant host cells comprising the isolated nucleic acid molecules, and methods of producing butanol.

Research Organization:
Butamax Advanced Biofuels LLC, Wilmington, DE (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AR0000006
Assignee:
Butamax Advanced Biofuels LLC (Wilmington, DE)
Patent Number(s):
10,287,566
Application Number:
15/406,876
OSTI ID:
1568323
Resource Relation:
Patent File Date: 01/16/2017
Country of Publication:
United States
Language:
English

References (99)

Nucleic acid coding for an .alpha.-acetolactate synthase from lactococcus and its applications patent July 1997
Fermentive production of four carbon alcohols patent September 2014
Fermentive production of four carbon alcohols patent March 2015
Isobutanol Tolerance in Yeast with an Altered Lipid Profile patent-application November 2016
Fermentive production of four carbon alcohols patent November 2014
Nucleic acid and amino acid sequences relating to Streptococcus pneumoniae for diagnostics and therapeutics patent March 2004
Fermentive production of four carbon alcohols patent September 2012
Enhanced pyruvate to 2,3-butanediol conversion in lactic acid bacteria patent June 2013
Yeast with increased butanol tolerance involving high osmolarity/glycerol response pathway patent June 2013
Fermentive production of four carbon alcohols patent May 2014
Bacterial Strains for Butanol Production patent-application August 2011
Solvent tolerant microorganisms and methods of isolation patent February 2010
Yeast with increased butanol tolerance involving a multidrug efflux pump gene patent December 2013
Fermentive production of four carbon alcohols patent June 2016
Fermentative Production of Alcohols patent-application August 2015
Fermentive production of four carbon alcohols patent May 2012
Flux to acetolactate-derived products in lactic acid bacteria patent October 2015
Ketol-acid reductoisomerase using NADH patent January 2016
Host cells and methods for production of isobutanol patent August 2016
Engineering Resistance to Aliphatic Alcohols patent-application March 2012
Ketol-acid reductoisomerase using NADH patent November 2014
Cytosolic Isobutanol Pathway Localization for the Production of Isobutanol patent-application March 2011
Alcohol dehydrogenases (ADH) useful for fermentive production of lower alkyl alcohols patent July 2014
Butanol dehydrogenase enzyme from the bacterium Achromobacter xylosoxidans patent May 2012
Fermentive production of four carbon alcohols patent December 2010
Lignocellulosic Hydrolysates as Feedstocks for Isobutanol Fermentation patent-application February 2013
Increased production of isobutanol in yeast with reduced mitochondrial amino acid biosynthesis patent August 2016
Dhad Variants for Butanol Production patent-application July 2014
Process for amplifying nucleic acid sequences patent July 1987
Method for producing butanol using extractive fermentation with electrolyte addition patent December 2013
Engineering resistance to aliphatic alcohols patent December 2014
Identification and use of Bacterial [2FE-2S] Dihydroxy-acid Dehydratases patent-application April 2010
Activity of FE-S Cluster Requiring Proteins patent-application February 2014
Genetic switches for butanol production patent November 2015
Yeast production host cells patent February 2016
Fermentive production of four carbon alcohols patent October 2012
Keto-isovalerate decarboxylase enzymes and methods of use thereof patent January 2016
Deletion mutants for the production of isobutanol patent-application December 2009
Method for the detection of melamine patent January 2014
Production of 2-butanol and 2-butanone employing aminobutanol phosphate phospholyase patent June 2012
Enhanced pyruvate to acetolactate conversion in yeast patent March 2014
Strain for butanol production with increased membrane unsaturated trans fatty acids patent February 2014
Fermentive Production of Isobutanol Using Highly Effective Ketol-acid Reductoisomerase Enzymes patent-application October 2011
Method for the fermentative production of D-pantothenic acid using Coryneform bacteria patent January 2001
Acetate Supplementation of Medium for Butanologens patent-application September 2013
Strain comprising increased expression of a CFA coding region for butanol production patent August 2013
Treatment of biomass to obtain fermentable sugars patent-application February 2007
Production of isobutanol by a microorganism with enhanced acetolactate synthase activity patent February 2015
Enhanced pyruvate to acetolactate conversion in yeast patent February 2015
Fermentive production of four carbon alcohols patent March 2016
Fermentive production of four carbon alcohols patent March 2016
Enhanced dihydroxy-acid dehydratase activity in lactic acid bacteria patent January 2014
Butanol dehydrogenase enzyme from the bacterium Achromobacter xylosoxidans patent April 2014
Carbon Pathway Optimized Production Hosts for the Production of Isobutanol patent-application May 2010
Ketol-acid reductoisomerase using NADH patent December 2014
Organic Acid Production by Fungal Cells patent-application February 2011
Host Cells and Methods for Production of Isobutanol patent-application January 2014
Recombinant host cell comprising a diol dehydratase patent February 2015
Ketol-acid reductoisomerase using NADH patent July 2012
Method for the production of isobutanol by recombinant yeast patent April 2016
Fermentive production of four carbon alcohols patent February 2015
Solvent tolerant microorganisms and methods of isolation patent June 2009
Activity of Fe—S cluster requiring proteins patent March 2016
Yeast with increased butanol tolerance involving filamentous growth response patent October 2013
Yeast strain for production of four carbon alcohols patent January 2015
Fermentive Production of Four Carbon Alcohols patent-application August 2012
Cytosolic isobutanol pathway localization for the production of isobutanol patent July 2012
Recombinant yeast host cells comprising FE-S cluster proteins patent December 2015
Method for producing butanol using extractive fermentation with electrolyte addition patent March 2015
Identification and use of bacterial [2Fe-2S] dihydroxy-acid dehydratases patent February 2015
Recombinant host cells comprising phosphoketolases patent October 2014
Fermentive production of four carbon alcohols patent June 2015
Ketol-acid reductoisomerase enzymes and methods of use patent October 2015
Butanol tolerance in microorganisms patent March 2016
Production of isobutanol in yeast mitochondria patent September 2014
Fermentive production of four carbon alcohols patent August 2011
Method for producing butanol using two-phase extractive fermentation patent September 2014
Yeast strain for production of four carbon alcohols patent March 2013
Fermentive production of isobutanol using highly active ketol-acid reductoisomerase enzymes patent March 2016
Ketol-acid reductoisomerase enzymes and methods of use patent July 2016
Enhanced pyruvate to acetolactate conversion in yeast patent March 2015
Increased production of isobutanol in yeast with reduced mitochondrial amino acid biosynthesis patent June 2013
Treatment of biomass to obtain fermentable sugars patent April 2011
Yeast with increased butanol tolerance involving cell wall integrity pathway patent August 2014
Ketol-acid reductoisomerase using NADH patent March 2012
Methods of increasing dihydroxy acid dehydratase activity to improve production of fuels, chemicals, and amino acids patent September 2011
Production of four carbon alcohols using improved strain patent February 2013
Methods of increasing dihydroxy acid dehydratase activity to improve production of fuels, chemicals, and amino acids patent September 2012
Increased production of isobutanol in yeast with reduced mitochondrial amino acid biosynthesis patent July 2014
Butanol strain improvement with integration of a polynucleotide encoding a polypeptide that catalyzes pyruvate to acetolactate conversion patent February 2016
Increased production of isobutanol in yeast with reduced mitochondrial amino acid biosynthesis patent October 2015
Enhanced pyruvate to 2,3-butanediol conversion in lactic acid bacteria patent July 2015
Enhanced Iron-sulfur Cluster Formation for Increased Dihydroxy-Acid Dehydratase Activity in Lactic Acid Bacteria patent-application April 2010
Fermentive production of isobutanol using highly active ketol-acid reductoisomerase enzymes patent March 2011
Ketol-acid reductoisomerase using NADH patent February 2015
Recombinant yeast host cell with Fe-S cluster proteins and methods of using thereof patent August 2012
Methods of increasing dihydroxy acid dehydratase activity to improve production of fuels, chemicals, and amino acids patent December 2011
Host Cells and Methods for Production of Isobutanol patent-application January 2014
Solvent tolerant microorganisms patent September 2011

Similar Records

DHAD variants and methods of screening
Patent · Tue Feb 28 00:00:00 EST 2017 · OSTI ID:1568323

OptSSeq explores enzyme expression and function landscapes to maximize isobutanol production rate
Journal Article · Fri Mar 01 00:00:00 EST 2019 · Metabolic Engineering · OSTI ID:1568323

Attempts to develop an enzyme converting DHIV to KIV
Journal Article · Mon Dec 23 00:00:00 EST 2019 · Protein Engineering, Design and Selection · OSTI ID:1568323