Evidence map›Paper›PMID 23028590›Full record

ArticlePloS one2012

Step-wise assembly, maturation and dynamic behavior of the human CENP-P/O/R/Q/U kinetochore sub-complex.

Anja Eskat, Wen Deng, Antje Hofmeister, Sven Rudolphi, Stephan Emmerth, Daniela Hellwig, Tobias Ulbricht, Volker Döring, James M Bancroft, Andrew D McAinsh and 5 more

Abstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
–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

26 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Structure and function of the centromere and inner kinetochore.Nature reviews. Molecular cell biology · 2026
    Review
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
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  11. Kinetochore assembly throughout the cell cycle.Seminars in cell & developmental biology · 2021
    Article
  12. Article
  13. Article
  14. Article
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  16. Stepwise unfolding supports a subunit model for vertebrate kinetochores.Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  17. Review
  18. Review
  19. Article
  20. Article
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

15 authors.

Anja EskatMolecular Biology, FLI, Jena, Germany.
Wen Deng
Antje Hofmeister
Sven Rudolphi
Stephan Emmerth
Daniela Hellwig
Tobias Ulbricht
Volker Döring
James M Bancroft
Andrew D McAinsh
M Cristina Cardoso
Patrick Meraldi
Christian Hoischen
Heinrich Leonhardt
Stephan Diekmann

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Kinetochores are multi-protein megadalton assemblies that are required for attachment of microtubules to centromeres and, in turn, the segregation of chromosomes in mitosis. Kinetochore assembly is a cell cycle regulated multi-step process. The initial step occurs during interphase and involves loading of the 15-subunit constitutive centromere associated complex (CCAN), which contains a 5-subunit (CENP-P/O/R/Q/U) sub-complex. Here we show using a fluorescent three-hybrid (F3H) assay and fluorescence resonance energy transfer (FRET) in living mammalian cells that CENP-P/O/R/Q/U subunits exist in a tightly packed arrangement that involves multifold protein-protein interactions. This sub-complex is, however, not pre-assembled in the cytoplasm, but rather assembled on kinetochores through the step-wise recruitment of CENP-O/P heterodimers and the CENP-P, -O, -R, -Q and -U single protein units. SNAP-tag experiments and immuno-staining indicate that these loading events occur during S-phase in a manner similar to the nucleosome binding components of the CCAN, CENP-T/W/N. Furthermore, CENP-P/O/R/Q/U binding to the CCAN is largely mediated through interactions with the CENP-N binding protein CENP-L as well as CENP-K. Once assembled, CENP-P/O/R/Q/U exchanges slowly with the free nucleoplasmic pool indicating a low off-rate for individual CENP-P/O/R/Q/U subunits. Surprisingly, we then find that during late S-phase, following the kinetochore-binding step, both CENP-Q and -U but not -R undergo oligomerization. We propose that CENP-P/O/R/Q/U self-assembles on kinetochores with varying stoichiometry and undergoes a pre-mitotic maturation step that could be important for kinetochores switching into the correct conformation necessary for microtubule-attachment.

Indexed as

Blotting, WesternCell Cycle ProteinsCell Line, TumorChromosomal Proteins, Non-HistoneFluorescence Resonance Energy TransferHeLa CellsHistonesHumansKinetochoresNuclear ProteinsCell Cycle ProteinsCENPO protein, humanCENPQ protein, humanCENPU protein, humanChromosomal Proteins, Non-HistoneHistonesNuclear Proteins

Identifiers

PMID23028590
PMCPMC3445539

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.