Evidence map›Paper›PMID 27384110›Full record

ArticleBiochemistry2016

Combining in Vitro Folding with Cell Free Protein Synthesis for Membrane Protein Expression.

Paul J Focke, Christopher Hein, Beate Hoffmann, Kimberly Matulef, Frank Bernhard, Volker Dötsch, Francis I Valiyaveetil

Abstract read
In one paragraph

Article in Biochemistry, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
–field-weighted citation impact
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

23 citing papers in PubMed.

  1. Review
  2. Article
  3. A Lactose-BasedChem & bio engineering · 2025
    Article
  4. Review
  5. Developing anACS synthetic biology · 2025
    Article
  6. Review
  7. Review
  8. Article
  9. Review
  10. What remains from living cells in bacterial lysate-based cell-free systems.Computational and structural biotechnology journal · 2023
    Review
  11. Article
  12. Applications of Cell-Free Synthesized Membrane Protein Precipitates.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
  13. Article
  14. Genetically Engineered Cellular Membrane Vesicles as Tailorable Shells for Therapeutics.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2021
    Article
  15. Cell-Free Protein Synthesis: A Promising Option for Future Drug Development.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2020
    Review
  16. Modulation of Function, Structure and Clustering of KInternational journal of molecular sciences · 2020
    Review
  17. Article
  18. Review
  19. Article
  20. Protein Sequences Recapitulate Genetic Code Evolution.Computational and structural biotechnology journal · 2018
    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

7 authors.

Paul J FockeProgram in Chemical Biology, Department of Physiology and Pharmacology, Oregon Health & Science University , 3181 Southwest Sam Jackson Park Road, Portland, Oregon 97239, United States.
Christopher HeinInstitute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University , Max-von-Laue Strasse 9, 60438 Frankfurt am Main, Germany.
Beate HoffmannInstitute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University , Max-von-Laue Strasse 9, 60438 Frankfurt am Main, Germany.
Kimberly MatulefProgram in Chemical Biology, Department of Physiology and Pharmacology, Oregon Health & Science University , 3181 Southwest Sam Jackson Park Road, Portland, Oregon 97239, United States.
Frank BernhardInstitute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University , Max-von-Laue Strasse 9, 60438 Frankfurt am Main, Germany.
Volker DötschInstitute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University , Max-von-Laue Strasse 9, 60438 Frankfurt am Main, Germany.
Francis I ValiyaveetilProgram in Chemical Biology, Department of Physiology and Pharmacology, Oregon Health & Science University , 3181 Southwest Sam Jackson Park Road, Portland, Oregon 97239, United States.

Funding

Synthetic Antigen Binder CoreU54GM087519 · NIGMS · UNIVERSITY OF CHICAGO · PI PEROZO, EDUARDO A · 2010 to 2017
$31.9M
Probing functional mechanisms in K+ channels using unnatural mutagenesisR01GM087546 · NIGMS · OREGON HEALTH & SCIENCE UNIVERSITY · PI VALIYAVEETIL, FRANCIS · 2009 to 2022
$4.0M
NIGMS NIH HHS R01 GM087546NIGMS NIH HHS U54 GM087519
6 · The paper itself

Abstract

Cell free protein synthesis (CFPS) has emerged as a promising methodology for protein expression. While polypeptide production is very reliable and efficient using CFPS, the correct cotranslational folding of membrane proteins during CFPS is still a challenge. In this contribution, we describe a two-step protocol in which the integral membrane protein is initially expressed by CFPS as a precipitate followed by an in vitro folding procedure using lipid vesicles for converting the protein precipitate to the correctly folded protein. We demonstrate the feasibility of using this approach for the K(+) channels KcsA and MVP and the amino acid transporter LeuT. We determine the crystal structure of the KcsA channel obtained by CFPS and in vitro folding to show the structural similarity to the cellular expressed KcsA channel and to establish the feasibility of using this two-step approach for membrane protein production for structural studies. Our studies show that the correct folding of these membrane proteins with complex topologies can take place in vitro without the involvement of the cellular machinery for membrane protein biogenesis. This indicates that the folding instructions for these complex membrane proteins are contained entirely within the protein sequence.

Indexed as

Bacterial ProteinsCell-Free SystemCrystallography, X-RayIn Vitro TechniquesLipid BilayersMembrane ProteinsModels, MolecularPotassium ChannelsProtein ConformationProtein FoldingRecombinant ProteinsBacterial ProteinsLipid BilayersMembrane ProteinsPotassium Channelsprokaryotic potassium channelRecombinant Proteins

Identifiers

PMID27384110
PMCPMC5021318

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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.