Evidence map›Paper›PMID 26897628›Full record

ArticleMicrobial cell factories2016

Using synthetic biology to increase nitrogenase activity.

Xin-Xin Li, Qi Liu, Xiao-Meng Liu, Hao-Wen Shi, San-Feng Chen

Open access · goldAbstract read
In one paragraph

Article in Microbial cell factories, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
1.7field-weighted citation impact, top 16% 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

31 citing papers in PubMed, 71 citations in OpenAlex.

  1. Article
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  4. From Biocontrol to Synthesis: Innovative Progress ofInternational journal of molecular sciences · 2025
    Review
  5. Article
  6. Review
  7. Review
  8. Review
  9. Article
  10. Review
  11. Assembly of nitrogenase biosynthetic pathway inFrontiers in microbiology · 2023
    Article
  12. Review
  13. Review
  14. Review
  15. Thermodynamic Constraints on Electromicrobial Protein Production.Frontiers in bioengineering and biotechnology · 2022
    Article
  16. Article
  17. Article
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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

5 authors at 1 institution in 1 country.

Xin-Xin LiKey Laboratory for Agrobiotechnology and Key Laboratory of Soil Microbiology of Agriculture Ministry, China Agricultural University, Yuanmingyuan West Road No. 2, Haidian District, Beijing, 100193, People's Republic of China. lixinxin-2002@163.com.
Qi LiuKey Laboratory for Agrobiotechnology and Key Laboratory of Soil Microbiology of Agriculture Ministry, China Agricultural University, Yuanmingyuan West Road No. 2, Haidian District, Beijing, 100193, People's Republic of China. 897043466@qq.com.
Xiao-Meng LiuKey Laboratory for Agrobiotechnology and Key Laboratory of Soil Microbiology of Agriculture Ministry, China Agricultural University, Yuanmingyuan West Road No. 2, Haidian District, Beijing, 100193, People's Republic of China. wsw_lxm2012@163.com.
Hao-Wen ShiKey Laboratory for Agrobiotechnology and Key Laboratory of Soil Microbiology of Agriculture Ministry, China Agricultural University, Yuanmingyuan West Road No. 2, Haidian District, Beijing, 100193, People's Republic of China. shw_126@126.com.
San-Feng ChenKey Laboratory for Agrobiotechnology and Key Laboratory of Soil Microbiology of Agriculture Ministry, China Agricultural University, Yuanmingyuan West Road No. 2, Haidian District, Beijing, 100193, People's Republic of China. chensf@cau.edu.cn.
China Agricultural University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundNitrogen fixation has been established in protokaryotic model Escherichia coli by transferring a minimal nif gene cluster composed of 9 genes (nifB, nifH, nifD, nifK, nifE, nifN, nifX, hesA and nifV) from Paenibacillus sp. WLY78. However, the nitrogenase activity in the recombinant E. coli 78-7 is only 10 % of that observed in wild-type Paenibacillus. Thus, it is necessary to increase nitrogenase activity through synthetic biology.

resultsIn order to increase nitrogenase activity in heterologous host, a total of 28 selected genes from Paenibacillus sp. WLY78 and Klebsiella oxytoca were placed under the control of Paenibacillus nif promoter in two different vectors and then they are separately or combinationally transferred to the recombinant E. coli 78-7. Our results demonstrate that Paenibacillus suf operon (Fe-S cluster assembly) and the potential electron transport genes pfoAB, fldA and fer can increase nitrogenase activity. Also, K. oxytoca nifSU (Fe-S cluster assembly) and nifFJ (electron transport specific for nitrogenase) can increase nitrogenase activity. Especially, the combined assembly of the potential Paenibacillus electron transporter genes (pfoABfldA) with K. oxytoca nifSU recovers 50.1 % of wild-type (Paenibacillus) activity. However, K. oxytoca nifWZM and nifQ can not increase activity.

conclusionThe combined assembly of the potential Paenibacillus electron transporter genes (pfoABfldA) with K. oxytoca nifSU recovers 50.1 % of wild-type (Paenibacillus) activity in the recombinant E. coli 78-7. Our results will provide valuable insights for the enhancement of nitrogenase activity in heterogeneous host and will provide guidance for engineering cereal plants with minimal nif genes.

Indexed as

Electron TransportEscherichia coliGenes, BacterialIron-Sulfur ProteinsKlebsiellaMultigene FamilyNitrogenasePaenibacillusRecombination, GeneticSynthetic BiologyIron-Sulfur ProteinsNitrogenase

Identifiers

PMID26897628
PMCPMC4761190
OpenAlexW2281189770

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.