Evidence map›Paper›PMID 18757367›Full record

ArticleThe Journal of biological chemistry2008

Gly-Ala repeats induce position- and substrate-specific regulation of 26 S proteasome-dependent partial processing.

Chrysoula Daskalogianni, Sébastien Apcher, Marco M Candeias, Nadia Naski, Fabien Calvo, Robin Fåhraeus

Abstract read
In one paragraph

Article in The Journal of biological chemistry, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing 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

33 citing papers in PubMed.

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  7. Substrate selection by the proteasome through initiation regions.Protein science : a publication of the Protein Society · 2019
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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

6 authors.

Chrysoula DaskalogianniINSERM U716, Institut de Génétique Moléculaire, Université Paris 7, Hôpital St. Louis, 75010 Paris, France.
Sébastien Apcher
Marco M Candeias
Nadia Naski
Fabien Calvo
Robin Fåhraeus

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Partial degradation or regulated ubiquitin proteasome-dependent processing by the 26 S proteasome has been demonstrated, but the underlying molecular mechanisms and the prevalence of this phenomenon remain obscure. Here we show that the Gly-Ala repeat (GAr) sequence of EBNA1 affects processing of substrates via the ubiquitin-dependent degradation pathway in a substrate- and position-specific fashion. GAr-mediated increase in stability of proteins targeted for degradation via the 26 S proteasome was associated with a fraction of the substrates being partially processed and the release of the free GAr. The GAr did not cause a problem for the proteolytic activity of the proteasome, and its fusion to the N terminus of p53 resulted in an increase in the rate of degradation of the entire chimera. Interestingly the GAr had little effect on the stability of EBNA1 protein itself, and targeting EBNA1 for 26 S proteasome-dependent degradation led to its complete degradation. Taken together, our data suggest a model in which the GAr prevents degradation or promotes endoproteolytic processing of substrates targeted for the 26 S proteasome by interfering with the initiation step of substrate unfolding. These results will help to further understand the underlying mechanisms for partial proteasome-dependent degradation.

Indexed as

AlanineGenes, p53GlycineHeLa CellsHumansMicroscopy, FluorescenceMolecular ConformationProteasome Endopeptidase ComplexProtein DenaturationProtein FoldingProtein Structure, TertiarySubstrate SpecificityTransfectionUbiquitinAlanineATP dependent 26S proteaseGlycineProteasome Endopeptidase ComplexUbiquitin

Identifiers

PMID18757367
PMCPMC2662073

What OpenQuestion holds

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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.