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Title: DHAD variants and methods of screening

Abstract

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.

Inventors:
;
Issue Date:
Research Org.:
Butamax Advanced Biofuels LLC Wilmington, DE (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1345383
Patent Number(s):
9580705
Application Number:
14/207,823
Assignee:
Butamax Advanced Biofuels LLC
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
C - CHEMISTRY C12 - BIOCHEMISTRY C12N - MICROORGANISMS OR ENZYMES
DOE Contract Number:  
AR0000006
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Mar 13
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Kelly, Kristen J., and Ye, Rick W. DHAD variants and methods of screening. United States: N. p., 2017. Web.
Kelly, Kristen J., & Ye, Rick W. DHAD variants and methods of screening. United States.
Kelly, Kristen J., and Ye, Rick W. Tue . "DHAD variants and methods of screening". United States. https://www.osti.gov/servlets/purl/1345383.
@article{osti_1345383,
title = {DHAD variants and methods of screening},
author = {Kelly, Kristen J. and Ye, Rick W.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 28 00:00:00 EST 2017},
month = {Tue Feb 28 00:00:00 EST 2017}
}

Works referenced in this record:

Nucleic acid coding for an .alpha.-acetolactate synthase from lactococcus and its applications
patent, July 1997


Method for the fermentative production of D-pantothenic acid using Coryneform bacteria
patent, January 2001


Solvent tolerant microorganisms and methods of isolation
patent, June 2009


Solvent tolerant microorganisms and methods of isolation
patent, February 2010


Fermentive production of four carbon alcohols
patent, December 2010


Fermentive production of isobutanol using highly active ketol-acid reductoisomerase enzymes
patent, March 2011


Treatment of biomass to obtain fermentable sugars
patent, April 2011


Fermentive production of four carbon alcohols
patent, August 2011


Solvent tolerant microorganisms
patent, September 2011


Ketol-acid reductoisomerase using NADH
patent, March 2012


Fermentive production of four carbon alcohols
patent, May 2012


Butanol dehydrogenase enzyme from the bacterium Achromobacter xylosoxidans
patent, May 2012


Production of 2-butanol and 2-butanone employing aminobutanol phosphate phospholyase
patent, June 2012


Ketol-acid reductoisomerase using NADH
patent, July 2012


Recombinant yeast host cell with Fe-S cluster proteins and methods of using thereof
patent, August 2012


Fermentive production of four carbon alcohols
patent, September 2012


Fermentive production of four carbon alcohols
patent, October 2012


Production of four carbon alcohols using improved strain
patent, February 2013


Yeast with increased butanol tolerance involving high osmolarity/glycerol response pathway
patent, June 2013


Strain comprising increased expression of a CFA coding region for butanol production
patent, August 2013


Yeast with increased butanol tolerance involving filamentous growth response
patent, October 2013


Expression of hexose kinase in recombinant host cells
patent, January 2014


Enhanced pyruvate to acetolactate conversion in yeast
patent, March 2014


Butanol dehydrogenase enzyme from the bacterium Achromobacter xylosoxidans
patent, April 2014


Fermentive production of four carbon alcohols
patent, May 2014


Alcohol dehydrogenases (ADH) useful for fermentive production of lower alkyl alcohols
patent, July 2014


Yeast with increased butanol tolerance involving cell wall integrity pathway
patent, August 2014


Production of isobutanol in yeast mitochondria
patent, September 2014


Method for producing butanol using two-phase extractive fermentation
patent, September 2014


Fermentive production of four carbon alcohols
patent, September 2014


Recombinant host cells comprising phosphoketolases
patent, October 2014


Fermentive production of four carbon alcohols
patent, November 2014


Engineering resistance to aliphatic alcohols
patent, December 2014


Ketol-acid reductoisomerase using NADH
patent, December 2014


Production of isobutanol by a microorganism with enhanced acetolactate synthase activity
patent, February 2015


Ketol-acid reductoisomerase using NADH
patent, February 2015


Fermentive production of four carbon alcohols
patent, February 2015


Identification and use of bacterial [2Fe-2S] dihydroxy-acid dehydratases
patent, February 2015


Enhanced pyruvate to acetolactate conversion in yeast
patent, February 2015


Recombinant host cell comprising a diol dehydratase
patent, February 2015


Enhanced pyruvate to acetolactate conversion in yeast
patent, March 2015


Fermentive production of four carbon alcohols
patent, March 2015


Treatment of biomass to obtain fermentable sugars
patent-application, February 2007


Fermentive Production Of Four Carbon Alcohols
patent-application, July 2008


Identification and use of Bacterial [2FE-2S] Dihydroxy-acid Dehydratases
patent-application, April 2010


Carbon Pathway Optimized Production Hosts for the Production of Isobutanol
patent-application, May 2010


Organic Acid Production by Fungal Cells
patent-application, February 2011


Cytosolic Isobutanol Pathway Localization for the Production of Isobutanol
patent-application, March 2011


Bacterial Strains for Butanol Production
patent-application, August 2011


Fermentive Production of Isobutanol Using Highly Effective Ketol-acid Reductoisomerase Enzymes
patent-application, October 2011


Engineering Resistance to Aliphatic Alcohols
patent-application, March 2012


Fermentive Production of Four Carbon Alcohols
patent-application, August 2012


Lignocellulosic Hydrolysates as Feedstocks for Isobutanol Fermentation
patent-application, February 2013


Acetate Supplementation of Medium for Butanologens
patent-application, September 2013


Host Cells and Methods for Production of Isobutanol
patent-application, January 2014


Host Cells and Methods for Production of Isobutanol
patent-application, January 2014


Activity of FE-S Cluster Requiring Proteins
patent-application, February 2014


Dhad Variants for Butanol Production
patent-application, July 2014


Analysis of a 108-kb Region of the Saccharopolyspora spinosa Genome Covering the Obscurin Polyketide Synthase Locus
journal, April 2004


An Investigation of the Metabolism of Valine to Isobutyl Alcohol in Saccharomyces cerevisiae
journal, October 1998


New insights and novel developments in clostridial acetone/butanol/isopropanol fermentation
journal, June 1998


Involvement of branched-chain amino acid aminotransferases in the production of fusel alcohols during fermentation in yeast
journal, April 2001


Studies on the Active Site of Dihydroxy-acid Dehydratase
journal, December 1993


Branched-chain amino acid biosynthesis genes in Lactococcus lactis subsp. lactis.
journal, October 1992


Technologies for butanol recovery integrated with fermentations
journal, March 1992


Engineering hybrid genes without the use of restriction enzymes: gene splicing by overlap extension
journal, April 1989


Catalytic Promiscuity in Dihydroxy-Acid Dehydratase from the Thermoacidophilic Archaeon Sulfolobus solfataricus
journal, March 2006


New thermosensitive plasmid for gram-positive bacteria.
journal, September 1992


High- and low-copy-number Lactococcus shuttle cloning vectors with features for clone screening
journal, December 1993


Cloning of theILV2, ILV3 andILV5 genes of Saccharomyces cerevisiae
journal, January 1984


Plasmid vectors for Gram-positive bacteria switching from high to low copy number
journal, January 1996


Electron spin relaxation of iron-sulphur proteins studied by microwave power saturation
journal, December 1978


Sequences of versatile broad-host-range vectors of the RK2 family
journal, July 2003


Melamine Deaminase and Atrazine Chlorohydrolase: 98 Percent Identical but Functionally Different
journal, April 2001


CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice
journal, January 1994


Functional Analysis of Three Plasmids from Lactobacillus plantarum
journal, March 2005


Heterologous protein production in yeast
book, January 1992


Industrial production of heterologous proteins by fed-batch cultures of the yeast Saccharomyces cereuisiae
journal, December 1994


Semi-rational approaches to engineering enzyme activity: combining the benefits of directed evolution and rational design
journal, August 2005


Cloning of the dihydroxyacid dehydratase-encoding gene (ILV3) from Saccharomyces cerevisiae
journal, December 1993


Disentangling the perturbational effects of amino acid substitutions in the DNA-binding domain of p53
journal, February 1999


Iron Acquisition and Transcriptional Regulation
journal, October 2009


Iron−Sulfur Cluster Biosynthesis: Functional Characterization of the N- and C-Terminal Domains of Human NFU
journal, February 2009


Codon usage tabulated from international DNA sequence databases: status for the year 2000
journal, January 2000


Glutaredoxins Grx3 and Grx4 regulate nuclear localisation of Aft1 and the oxidative stress response in Saccharomyces cerevisiae
journal, November 2006


New integration vector using a cellulase gene as a screening marker for Lactobacillus
journal, July 2003


Transformation of Lactobacillus plantarum by electroporation with in vitro modified plasmid DNA
journal, December 2004