Evidence map›Paper›PMID 32499529›Full record

ArticleScientific reports2020

Cell-free expression tools to study co-translational folding of alpha helical membrane transporters.

Nicola J Harris, Grant A Pellowe, Paula J Booth

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.3field-weighted citation impact, top 21% 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

16 citing papers in PubMed, 24 citations in OpenAlex.

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  4. Spatially regulated mRNA translation enables functional membrane protein integration in synthetic cells.Proceedings of the National Academy of Sciences of the United States of America · 2026
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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

3 authors at 1 institution in 1 country.

Nicola J HarrisKing's College London, Department of Chemistry, Britannia House, 7 Trinity Street, London, SE1 1DB, UK.ORCID http://orcid.org/0000-0001-7049-1253
Grant A PelloweKing's College London, Department of Chemistry, Britannia House, 7 Trinity Street, London, SE1 1DB, UK.ORCID http://orcid.org/0000-0003-4314-5261
Paula J BoothKing's College London, Department of Chemistry, Britannia House, 7 Trinity Street, London, SE1 1DB, UK. paula.booth@kcl.ac.uk.
King's College London · GB

Funding

Wellcome Trust 214259Wellcome Trust 214259/Z/18/Z
6 · The paper itself

Abstract

Most helical membrane proteins fold co-translationally during unidirectional polypeptide elongation by the ribosome. Studies thus far, however, have largely focussed on refolding full-length proteins from artificially induced denatured states that are far removed from the natural co-translational process. Cell-free translation offers opportunities to remedy this deficit in folding studies and has previously been used for membrane proteins. We exploit this cell-free approach to develop tools to probe co-translational folding. We show that two transporters from the ubiquitous Major Facilitator Superfamily can successfully insert into a synthetic bilayer without the need for translocon insertase apparatus that is essential in vivo. We also assess the cooperativity of domain insertion, by expressing the individual transporter domains cell-free. Furthermore, we manipulate the cell-free reaction to pause and re-start protein synthesis at specific points in the protein sequence. We find that full-length protein can still be made when stalling after the first N terminal helix has inserted into the bilayer. However, stalling after the first three helices have exited the ribosome cannot be successfully recovered. These three helices cannot insert stably when ribosome-bound during co-translational folding, as they require insertion of downstream helices.

Indexed as

Cell-Free SystemDatabases, ProteinEscherichia coliEscherichia coli ProteinsLiposomesMembrane Transport ProteinsMonosaccharide Transport ProteinsMutagenesis, Site-DirectedProtein Conformation, alpha-HelicalProtein FoldingSymportersEscherichia coli ProteinsLacY protein, E coliLiposomesMembrane Transport ProteinsMonosaccharide Transport ProteinsSymporters

Identifiers

PMID32499529
PMCPMC7272624
OpenAlexW3033028820

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.