Evidence map›Paper›PMID 21124800›Full record

ArticlePloS one2010

High-yield expression of heterologous [FeFe] hydrogenases in Escherichia coli.

Jon M Kuchenreuther, Celestine S Grady-Smith, Alyssa S Bingham, Simon J George, Stephen P Cramer, James R Swartz

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed
3.3field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

71 citing papers in PubMed, 178 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. In vitro maturation of fully active [FeFe]-hydrogenase in a defined system including the iron carrier NfuA.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  9. Hydrogen-Producing Catalysts Based on Ferredoxin Scaffolds.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Article
  10. Structural determinants of oxygen resistance and ZnProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. The AlgaInternational journal of molecular sciences · 2023
    Article
  18. Article
  19. Maturation strategy influences expression levels and cofactor occupancy in Fe-S proteins.Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry · 2023
    Article
  20. Increasing the OACS catalysis · 2023
    Article

11 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Jon M KuchenreutherDepartment of Chemical Engineering, Stanford University, Stanford, California, USA.
Celestine S Grady-Smith
Alyssa S Bingham
Simon J George
Stephen P Cramer
James R Swartz
Stanford University · USLawrence Berkeley National Laboratory · USUniversity of California, Davis · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe realization of hydrogenase-based technologies for renewable H(2) production is presently limited by the need for scalable and high-yielding methods to supply active hydrogenases and their required maturases. PRINCIPAL

findingsIn this report, we describe an improved Escherichia coli-based expression system capable of producing 8-30 mg of purified, active [FeFe] hydrogenase per liter of culture, volumetric yields at least 10-fold greater than previously reported. Specifically, we overcame two problems associated with other in vivo production methods: low protein yields and ineffective hydrogenase maturation. The addition of glucose to the growth medium enhances anaerobic metabolism and growth during hydrogenase expression, which substantially increases total yields. Also, we combine iron and cysteine supplementation with the use of an E. coli strain upregulated for iron-sulfur cluster protein accumulation. These measures dramatically improve in vivo hydrogenase activation. Two hydrogenases, HydA1 from Chlamydomonas reinhardtii and HydA (CpI) from Clostridium pasteurianum, were produced with this improved system and subsequently purified. Biophysical characterization and FTIR spectroscopic analysis of these enzymes indicate that they harbor the H-cluster and catalyze H(2) evolution with rates comparable to those of enzymes isolated from their respective native organisms. SIGNIFICANCE: The production system we describe will facilitate basic hydrogenase investigations as well as the development of new technologies that utilize these prolific H(2)-producing enzymes. These methods can also be extended for producing and studying a variety of oxygen-sensitive iron-sulfur proteins as well as other proteins requiring anoxic environments.

Indexed as

Gene Expression Regulation, EnzymologicAnaerobiosisBiocatalysisChlamydomonas reinhardtiiClostridiumCysteineEscherichia coliHydrogenHydrogenaseIronIron-Sulfur ProteinsRecombinant ProteinsSpectroscopy, Fourier Transform InfraredCysteineHydrogenHydrogenaseIroniron hydrogenaseIron-Sulfur ProteinsRecombinant Proteins

Identifiers

PMID21124800
PMCPMC2991362
OpenAlexW1985299274

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.