Evidence map›Paper›PMID 19536129›Full record

ArticleThe EMBO journal2009

Conformational changes in switch I of EF-G drive its directional cycling on and off the ribosome.

Cristina Ticu, Roxana Nechifor, Boray Nguyen, Melanie Desrosiers, Kevin S Wilson

Open access · bronzeAbstract read
In one paragraph

Article in The EMBO journal, 2009. 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
2.4field-weighted citation impact, top 12% 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

23 citing papers in PubMed, 34 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Structural basis of elongation factor 2 switching.Current research in structural biology · 2020
    Article
  7. Article
  8. Review
  9. Elongation factor G initiates translocation through a power stroke.Proceedings of the National Academy of Sciences of the United States of America · 2016
    Article
  10. EF-G Activation by Phosphate Analogs.Journal of molecular biology · 2016
    Article
  11. Article
  12. Following movement of domain IV of elongation factor G during ribosomal translocation.Proceedings of the National Academy of Sciences of the United States of America · 2014
    Article
  13. Article
  14. Article
  15. 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.

Cristina TicuDepartment of Biochemistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada T6G 2H7.
Roxana Nechifor
Boray Nguyen
Melanie Desrosiers
Kevin S Wilson
University of Alberta · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We have trapped elongation factor G (EF-G) from Escherichia coli in six, functionally defined states, representing intermediates in its unidirectional catalytic cycle, which couples GTP hydrolysis to tRNA-mRNA translocation in the ribosome. By probing EF-G with trypsin in each state, we identified a substantial conformational change involving its conserved switch I (sw1) element, which contacts the GTP substrate. By attaching FeBABE (a hydroxyl radical generating probe) to sw1, we could monitor sw1 movement (by approximately 20 A), relative to the 70S ribosome, during the EF-G cycle. In free EF-G, sw1 is disordered, particularly in GDP-bound and nucleotide-free states. On EF-G*GTP binding to the ribosome, sw1 becomes structured and tucked inside the ribosome, thereby locking GTP onto EF-G. After hydrolysis and translocation, sw1 flips out from the ribosome, greatly accelerating release of GDP and EF-G from the ribosome. Collectively, our results support a central role of sw1 in driving the EF-G cycle during protein synthesis.

Indexed as

Escherichia coliEscherichia coli ProteinsGuanosine TriphosphateModels, MolecularPeptide Elongation Factor GPeptide Elongation Factor TuProtein ConformationRibosomesRibosome Subunits, Small, BacterialTrypsinEscherichia coli ProteinsGuanosine TriphosphatePeptide Elongation Factor GPeptide Elongation Factor TuTrypsin

Identifiers

PMID19536129
PMCPMC2718289
OpenAlexW1981055182

What OpenQuestion holds

Textmetadata
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.