Evidence map›Paper›PMID 28320377›Full record

ArticleMicrobial cell factories2017

Application of an E. coli signal sequence as a versatile inclusion body tag.

Wouter S P Jong, David Vikström, Diane Houben, H Bart van den Berg van Saparoea, Jan-Willem de Gier, Joen Luirink

Open access · goldAbstract read
In one paragraph

Article in Microbial cell factories, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.5field-weighted citation impact, top 10% 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

26 citing papers in PubMed, 60 citations in OpenAlex.

  1. Article
  2. Article
  3. EngineeringMicroorganisms · 2026
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  17. Coiled-Coil Based Inclusion Bodies and Their Potential Applications.Frontiers in bioengineering and biotechnology · 2021
    Review
  18. Identification of gene fusion events inNAR genomics and bioinformatics · 2020
    Article
  19. Article
  20. 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

6 authors at 4 institutions in 2 countries.

Wouter S P JongAbera Bioscience AB, 11145, Stockholm, Sweden. wouter.jong@aberabio.com.
David VikströmXbrane Biopharma AB, 11145, Stockholm, Sweden.
Diane HoubenAbera Bioscience AB, 11145, Stockholm, Sweden.
H Bart van den Berg van SaparoeaAbera Bioscience AB, 11145, Stockholm, Sweden.
Jan-Willem de GierCenter for Biomembrane Research, Department of Biochemistry and Biophysics, Stockholm University, 10691, Stockholm, Sweden.
Joen LuirinkAbera Bioscience AB, 11145, Stockholm, Sweden. s.luirink@vu.nl.
Abera Bioscience (Sweden) · SEStockholm University · SEUtrecht University · NLXbrane Biopharma (Sweden) · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHeterologous protein production in Escherichia coli often suffers from bottlenecks such as proteolytic degradation, complex purification procedures and toxicity towards the expression host. Production of proteins in an insoluble form in inclusion bodies (IBs) can alleviate these problems. Unfortunately, the propensity of heterologous proteins to form IBs is variable and difficult to predict. Hence, fusing the target protein to an aggregation prone polypeptide or IB-tag is a useful strategy to produce difficult-to-express proteins in an insoluble form.

resultsWhen screening for signal sequences that mediate optimal targeting of heterologous proteins to the periplasmic space of E. coli, we observed that fusion to the 39 amino acid signal sequence of E. coli TorA (ssTorA) did not promote targeting but rather directed high-level expression of the human proteins hEGF, Pla2 and IL-3 in IBs. Further analysis revealed that ssTorA even mediated IB formation of the highly soluble endogenous E. coli proteins TrxA and MBP. The ssTorA also induced aggregation when fused to the C-terminus of target proteins and appeared functional as IB-tag in E. coli K-12 as well as B strains. An additive effect on IB-formation was observed upon fusion of multiple ssTorA sequences in tandem, provoking almost complete aggregation of TrxA and MBP. The ssTorA-moiety was successfully used to produce the intrinsically unstable hEGF and the toxic fusion partner SymE, demonstrating its applicability as an IB-tag for difficult-to-express and toxic proteins.

conclusionsWe present proof-of-concept for the use of ssTorA as a small, versatile tag for robust E. coli-based expression of heterologous proteins in IBs.

Indexed as

Carrier ProteinsEpidermal Growth FactorEscherichia coliEscherichia coli ProteinsGenetic VectorsHumansInclusion BodiesInterleukin-3Periplasmic Binding ProteinsProtein Sorting SignalsRecombinant Fusion ProteinsSolubilityThioredoxinsCarrier ProteinsEpidermal Growth FactorEscherichia coli ProteinsIL3 protein, humanInterleukin-3MalE protein, E coliPeriplasmic Binding ProteinsProtein Sorting SignalsRecombinant Fusion ProteinsThioredoxinsTrxA protein, E coliAggregationE. coliFusion tagHeterologous protein productionInclusion bodiesInsolubilitySignal peptideTwin-arginine translocation pathway

Identifiers

PMID28320377
PMCPMC5359840
OpenAlexW2600458905

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LicenceCC BY
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Registered trials

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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.