Evidence map›Paper›PMID 19525937›Full record

ArticleNature cell biology2009

Lateral microtubule bundles promote chromosome alignment during acentrosomal oocyte meiosis.

Sarah M Wignall, Anne M Villeneuve

Open access · greenAbstract read
In one paragraph

Article in Nature cell biology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 105 papers.

0numbers the graph read from it
0cells of the map it votes in
105citing papers in PubMed
5.3field-weighted citation impact, top 4% 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

105 citing papers in PubMed, 149 citations in OpenAlex.

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45 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Sarah M WignallDepartment of Developmental Biology, Stanford University School of Medicine, CA 94305, USA. swignall@stanford.edu
Anne M Villeneuve
Stanford University · US

Funding

MEIOTIC CHROMOSOME SEGREGATION IN C. ELEGANSR01GM053804 · NIGMS · STANFORD UNIVERSITY · PI VILLENEUVE, ANNE M · 1996 to 2017
$5.7M
NIGMS NIH HHS R01 GM053804NIGMS NIH HHS R01 GM53804
6 · The paper itself

Abstract

Although centrosomes serve to organize microtubules in most cell types, oocyte spindles form and mediate meiotic chromosome segregation in their absence. Here, we used high-resolution imaging of both bipolar and experimentally generated monopolar spindles in Caenorhabditis elegans to reveal a surprising organization of microtubules and chromosomes within acentrosomal structures. We found that homologous chromosome pairs (bivalents) are surrounded by microtubule bundles running along their sides, whereas microtubule density is extremely low at chromosome ends despite a high concentration of kinetochore proteins at those regions. Furthermore, we found that the chromokinesin KLP-19 (kinesin-like protein 19) is targeted to a ring around the centre of each bivalent and provides a polar ejection force that is required for congression. Together, these observations create a new picture of chromosome-microtubule association in acentrosomal spindles and reveal a mechanism by which metaphase alignment can be achieved using this organization. Specifically, we propose that ensheathment by lateral microtubule bundles places spatial constraints on the chromosomes, thereby promoting biorientation, and that localized motors mediate movement along these bundles, thereby promoting alignment.

Indexed as

AnimalsCaenorhabditis elegansCaenorhabditis elegans ProteinsCentrosomeChromosomesFluorescent Antibody TechniqueKinesinsMeiosisMicrotubulesModels, BiologicalOocytesRNA InterferenceCaenorhabditis elegans ProteinsKinesinsKLP-19 protein, C elegans

Identifiers

PMID19525937
PMCPMC2760407
OpenAlexW2079624700

What OpenQuestion holds

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LicenceTDM
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.