Evidence map›Paper›PMID 27069508›Full record

ArticleBiotechnology for biofuels2016

Comprehensive molecular characterization of Methylobacterium extorquens AM1 adapted for 1-butanol tolerance.

Bo Hu, Yi-Ming Yang, David A C Beck, Qian-Wen Wang, Wen-Jing Chen, Jing Yang, Mary E Lidstrom, Song Yang

Open access · goldAbstract read
In one paragraph

Article in Biotechnology for biofuels, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
3.1field-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

17 citing papers in PubMed, 40 citations in OpenAlex.

  1. Adaptively evolvedApplied and environmental microbiology · 2025
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  3. Review
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  5. Review
  6. Aerobic Utilization of Methanol for Microbial Growth and Production.Advances in biochemical engineering/biotechnology · 2022
    Article
  7. Article
  8. Review
  9. Article
  10. Review
  11. Article
  12. Continuous Culture Adaptation ofFrontiers in microbiology · 2019
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
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

8 authors at 3 institutions in 2 countries.

Bo HuDepartment of Chemical Engineering, University of Washington, Seattle, WA USA ; Industrial Product Division, Intrexon Corporation, South San Francisco, CA 94080 USA.
Yi-Ming YangSchool of Life Science, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province China.
David A C BeckDepartment of Chemical Engineering, University of Washington, Seattle, WA USA ; eScience Institute, University of Washington, Seattle, WA USA.
Qian-Wen WangCentral Laboratory, Qingdao Agricultural University, Qingdao, Shandong Province China.
Wen-Jing ChenSchool of Life Science, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province China.
Jing YangSchool of Life Science, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province China.
Mary E LidstromDepartment of Chemical Engineering, University of Washington, Seattle, WA USA ; Department of Microbiology, University of Washington, Seattle, WA 98195-1750 USA.
Song YangSchool of Life Science, Shandong Province Key Laboratory of Applied Mycology, and Qingdao International Center on Microbes Utilizing Biogas, Qingdao Agricultural University, Qingdao, Shandong Province China ; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin, China.
Qingdao Agricultural University · CNUniversity of Washington · USTianjin University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe toxicity of alcohols is one of the major roadblocks of biological fermentation for biofuels production. Methylobacterium extorquens AM1, a facultative methylotrophic α-proteobacterium, has been engineered to generate 1-butanol from cheap carbon feedstocks through a synthetic metabolic pathway. However, M. extorquens AM1 is vulnerable to solvent stress, which impedes further development for 1-butanol production. Only a few studies have reported the general stress response of M. extorquens AM1 to solvent stress. Therefore, it is highly desirable to obtain a strain with ameliorated 1-butanol tolerance and elucidate the molecular mechanism of 1-butnaol tolerance in M. extorquens AM1 for future strain improvement.

resultsIn this work, adaptive laboratory evolution was used as a tool to isolate mutants with 1-butanol tolerance up to 0.5 %. The evolved strains, BHBT3 and BHBT5, demonstrated increased growth rates and higher survival rates with the existence of 1-butanol. Whole genome sequencing revealed a SNP mutation at kefB in BHBT5, which was confirmed to be responsible for increasing 1-butanol tolerance through an allelic exchange experiment. Global metabolomic analysis further discovered that the pools of multiple key metabolites, including fatty acids, amino acids, and disaccharides, were increased in BHBT5 in response to 1-butanol stress. Additionally, the carotenoid synthesis pathway was significantly down-regulated in BHBT5.

conclusionsWe successfully screened mutants resistant to 1-butanol and provided insights into the molecular mechanism of 1-butanol tolerance in M. extorquens AM1. This research will be useful for uncovering the mechanism of cellular response of M. extorquens AM1 to solvent stress, and will provide the genetic blueprint for the rational design of a strain of M. extorquens AM1 with increased 1-butanol tolerance in the future.

Indexed as

1-Butanol toleranceAdaptive evolutionCarotenoidGlobal metabolome analysisMethylobacterium extorquens AM1Whole genome sequencing

Identifiers

PMID27069508
PMCPMC4827201
OpenAlexW2323407309

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.