Evidence map›Paper›PMID 21317897›Full record

ArticleNature structural & molecular biology2011

Critical nucleus size for disease-related polyglutamine aggregation is repeat-length dependent.

Karunakar Kar, Murali Jayaraman, Bankanidhi Sahoo, Ravindra Kodali, Ronald Wetzel

Open access · greenAbstract read
In one paragraph

Article in Nature structural & molecular biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 101 papers.

0numbers the graph read from it
0cells of the map it votes in
101citing papers in PubMed
8.2field-weighted citation impact, top 1% 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

101 citing papers in PubMed, 220 citations in OpenAlex.

  1. Modeling Protein Aggregation Kinetics from NMR Data.Journal of molecular biology · 2025
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41 more citing papers are in PubMed but not listed here.

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.

Karunakar KarStructural Biology Department, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
Murali Jayaraman
Bankanidhi Sahoo
Ravindra Kodali
Ronald Wetzel
University of Pittsburgh · US

Funding

Structures and Properties of Polyglutamine Proteins and Their AggregatesR01AG019322 · NIA · UNIVERSITY OF TENNESSEE KNOXVILLE · PI WETZEL, RONALD B · 2001 to 2014
$4.6M
High throughput assay development for Huntington?s DiseaseR21AG033757 · NIA · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI WETZEL, RONALD B · 2009 to 2010
$342k
NIA NIH HHS R01 AG019322NIA NIH HHS R21 AG033757
6 · The paper itself

Abstract

Because polyglutamine (polyQ) aggregate formation has been implicated as playing an important role in expanded CAG repeat diseases, it is important to understand the biophysics underlying the initiation of aggregation. Previously, we showed that relatively long polyQ peptides aggregate by nucleated growth polymerization and a monomeric critical nucleus. We show here that over a short range of repeat lengths, from Q(23) to Q(26), the size of the critical nucleus for aggregation increases from monomeric to dimeric to tetrameric. This variation in nucleus size suggests a common duplex antiparallel β-sheet framework for the nucleus, and it further supports the feasibility of an organized monomeric aggregation nucleus for longer polyQ repeat peptides. The data also suggest that a change in the size of aggregation nuclei may have a role in the pathogenicity of polyQ expansion in this series of familial neurodegenerative diseases.

Indexed as

HumansKineticsNeurodegenerative DiseasesPeptidesProtein Structure, SecondaryPeptidespolyglutamine

Identifiers

PMID21317897
PMCPMC3075957
OpenAlexW2057673048

What OpenQuestion holds

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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.