Evidence map›Paper›PMID 33203865›Full record

ArticleNature communications2020

A ribosome-associated chaperone enables substrate triage in a cotranslational protein targeting complex.

Hao-Hsuan Hsieh, Jae Ho Lee, Sowmya Chandrasekar, Shu-Ou Shan

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
3.3field-weighted citation impact, top 7% 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

45 citing papers in PubMed, 60 citations in OpenAlex.

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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

4 authors at 1 institution in 1 country.

Hao-Hsuan HsiehDivision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA.ORCID 0000-0001-9629-5832
Jae Ho LeeDivision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA.
Sowmya ChandrasekarDivision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA.
Shu-Ou ShanDivision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA. sshan@caltech.edu.ORCID 0000-0002-6526-1733
California Institute of Technology · US

Funding

Supplement: Accurate Molecular Decision Making during Protein BiogenesisR35GM136321 · NIGMS · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI Shu-ou Shan · 2020 to 2026
$6.7M
Molecular Mechanism of Protein Targeting by the Signal Recognition ParticleR01GM078024 · NIGMS · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI SHAN, SHU-OU · 2007 to 2020
$4.4M
NIGMS NIH HHS R01 GM078024NIGMS NIH HHS R35 GM136321
6 · The paper itself

Abstract

Protein biogenesis is essential in all cells and initiates when a nascent polypeptide emerges from the ribosome exit tunnel, where multiple ribosome-associated protein biogenesis factors (RPBs) direct nascent proteins to distinct fates. How distinct RPBs spatiotemporally coordinate with one another to affect accurate protein biogenesis is an emerging question. Here, we address this question by studying the role of a cotranslational chaperone, nascent polypeptide-associated complex (NAC), in regulating substrate selection by signal recognition particle (SRP), a universally conserved protein targeting machine. We show that mammalian SRP and SRP receptors (SR) are insufficient to generate the biologically required specificity for protein targeting to the endoplasmic reticulum. NAC co-binds with and remodels the conformational landscape of SRP on the ribosome to regulate its interaction kinetics with SR, thereby reducing the nonspecific targeting of signalless ribosomes and pre-emptive targeting of ribosomes with short nascent chains. Mathematical modeling demonstrates that the NAC-induced regulations of SRP activity are essential for the fidelity of cotranslational protein targeting. Our work establishes a molecular model for how NAC acts as a triage factor to prevent protein mislocalization, and demonstrates how the macromolecular crowding of RPBs at the ribosome exit site enhances the fidelity of substrate selection into individual protein biogenesis pathways.

Indexed as

Fluorescence Resonance Energy TransferHumansMicroscopy, FluorescenceModels, TheoreticalMolecular ChaperonesProtein BiosynthesisReceptors, Cytoplasmic and NuclearReceptors, PeptideRecombinant ProteinsRibosomesSignal Recognition ParticleSingle Molecule ImagingMolecular Chaperonesnascent-polypeptide-associated complexReceptors, Cytoplasmic and NuclearReceptors, PeptideRecombinant Proteinssignal peptide receptorSignal Recognition Particle

Identifiers

PMID33203865
PMCPMC7673040
OpenAlexW3098142057

What OpenQuestion holds

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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.