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General approach to reversing ketol-acid reductoisomerase cofactor dependence from NADPH to NADH

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [1];  [3];  [4];  [1];  [5];  [1];  [1]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States); MRC Lab. of Molecular Biology, Cambridge (United Kingdom)
  3. California Inst. of Technology (CalTech), Pasadena, CA (United States); Colorado State Univ., Fort Collins, CO (United States)
  4. California Inst. of Technology (CalTech), Pasadena, CA (United States); Univ. of North Carolina, Chapel Hill, NC (United States)
  5. Gevo, Inc., Englewood, CO (United States)

To date, efforts to switch the cofactor specificity of oxidoreductases from nicotinamide adenine dinucleotide phosphate (NADPH) to nicotinamide adenine dinucleotide (NADH) have been made on a case-by-case basis with varying degrees of success. Here we present a straightforward recipe for altering the cofactor specificity of a class of NADPH-dependent oxidoreductases, the ketol-acid reductoisomerases (KARIs). Combining previous results for an engineered NADH-dependent variant of Escherichia coli KARI with available KARI crystal structures and a comprehensive KARI-sequence alignment, we identified key cofactor specificity determinants and used this information to construct five KARIs with reversed cofactor preference. Additional directed evolution generated two enzymes having NADH-dependent catalytic efficiencies that are greater than the wild-type enzymes with NADPH. As a result, high-resolution structures of a wild-type/variant pair reveal the molecular basis of the cofactor switch.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1128893
Report Number(s):
SLAC-REPRINT--2014-040
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 27 Vol. 110; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (19)

Protein engineering of oxidoreductases utilizing nicotinamide-based coenzymes, with applications in synthetic biology journal September 2017
NADH/NADPH bi-cofactor-utilizing and thermoactive ketol-acid reductoisomerase from Sulfolobus acidocaldarius journal May 2018
Substitutions at the cofactor phosphate-binding site of a clostridial alcohol dehydrogenase lead to unexpected changes in substrate specificity journal June 2015
An Ancient Fingerprint Indicates the Common Ancestry of Rossmann-Fold Enzymes Utilizing Different Ribose-Based Cofactors journal March 2016
Protein Engineering for Nicotinamide Coenzyme Specificity in Oxidoreductases: Attempts and Challenges journal February 2018
Structural Rearrangements of a Dodecameric Ketol-Acid Reductoisomerase Isolated from a Marine Thermophilic Methanogen journal November 2021
A Panel of TrpB Biocatalysts Derived from Tryptophan Synthase through the Transfer of Mutations that Mimic Allosteric Activation journal August 2016
Regulating Cofactor Balance In Vivo with a Synthetic Flavin Analogue journal November 2018
A Panel of TrpB Biocatalysts Derived from Tryptophan Synthase through the Transfer of Mutations that Mimic Allosteric Activation journal August 2016
Regulating Cofactor Balance In Vivo with a Synthetic Flavin Analogue journal November 2018
Switch in Cofactor Specificity of a Baeyer-Villiger Monooxygenase journal November 2016
Crystal Structures of Staphylococcus aureus Ketol-Acid Reductoisomerase in Complex with Two Transition State Analogues that Have Biocidal Activity journal November 2017
In-Silico Bioprospecting: Finding Better Enzymes journal November 2018
Engineering highly functional thermostable proteins using ancestral sequence reconstruction journal October 2018
Coenzyme Engineering of a Hyperthermophilic 6-Phosphogluconate Dehydrogenase from NADP+ to NAD+ with Its Application to Biobatteries journal November 2016
Ultra-rapid rates of water splitting for biohydrogen gas production through in vitro artificial enzymatic pathways journal January 2018
Mutations in adenine-binding pockets enhance catalytic properties of NAD(P)H-dependent enzymes journal October 2015
Biological Functions of ilvC in Branched-Chain Fatty Acid Synthesis and Diffusible Signal Factor Family Production in Xanthomonas campestris journal December 2017
Crystal Structure of IlvC, a Ketol-Acid Reductoisomerase, from Streptococcus Pneumoniae journal October 2019

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