Evidence map›Paper›PMID 25331944›Full record

ArticleThe Journal of biological chemistry2014

The Arabidopsis COBRA protein facilitates cellulose crystallization at the plasma membrane.

Nadav Sorek, Hagit Sorek, Aleksandra Kijac, Heidi J Szemenyei, Stefan Bauer, Kian Hématy, David E Wemmer, Chris R Somerville

RetractedOpen access · hybridAbstract readRetracted Publication
In one paragraph

Article in The Journal of biological chemistry, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It has been retracted, and should not be counted. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
9.3field-weighted citation impact, top 2% 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

17 citing papers in PubMed, 40 citations in OpenAlex.

  1. The COBRA-Like9 from Glycine tabacina enhanced salt tolerance in cultivated soybean.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2026
    Article
  2. Article
  3. Identification ofGenes · 2023
    Article
  4. Article
  5. Building an extensible cell wall.Plant physiology · 2022
    Article
  6. Article
  7. Article
  8. Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
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  10. Article
  11. Article
  12. Article
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  15. Review
  16. Article
  17. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 4 countries.

Nadav SorekFrom the Energy Biosciences Institute, the Plant and Microbial Biology Department, and nadavsorek@berkeley.edu.
Hagit SorekFrom the Energy Biosciences Institute.
Aleksandra Kijacthe Department of Chemistry, University of California, Berkeley, California 94720.
Heidi J SzemenyeiFrom the Energy Biosciences Institute, the Plant and Microbial Biology Department, and.
Stefan BauerFrom the Energy Biosciences Institute.
Kian Hématythe INRA, Institut Jean-Pierre Bourgin, UMR 1318, ERL CNRS3559, Saclay Plant Sciences, RD10, F-78026 Versailles, France, AgroParisTech, Institut Jean-Pierre Bourgin, UMR 1318, ERL CNRS3559, Saclay Plant Sciences, RD10, F-78026 Versailles, France, and.
David E WemmerFrom the Energy Biosciences Institute, the Department of Chemistry, University of California, Berkeley, California 94720.
Chris R SomervilleFrom the Energy Biosciences Institute, the Plant and Microbial Biology Department, and Department of Arid Land Agriculture, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, 21589 Jeddah, Saudi Arabia.
Energy Biosciences Institute · USInstitute of Plant and Microbial Biology, Academia Sinica · TWUniversity of California, Berkeley · USInstitut Jean-Pierre Bourgin · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mutations in the Arabidopsis COBRA gene lead to defects in cellulose synthesis but the function of COBRA is unknown. Here we present evidence that COBRA localizes to discrete particles in the plasma membrane and is sensitive to inhibitors of cellulose synthesis, suggesting that COBRA and the cellulose synthase complex reside in close proximity on the plasma membrane. Live-cell imaging of cellulose synthesis indicated that, once initiated, cellulose synthesis appeared to proceed normally in the cobra mutant. Using isothermal calorimetry, COBRA was found to bind individual β1-4-linked glucan chains with a KD of 3.2 μm. Competition assays suggests that COBRA binds individual β1-4-linked glucan chains with higher affinity than crystalline cellulose. Solid-state nuclear magnetic resonance studies of the cell wall of the cobra mutant also indicated that, in addition to decreases in cellulose amount, the properties of the cellulose fibrils and other cell wall polymers differed from wild type by being less crystalline and having an increased number of reducing ends. We interpret the available evidence as suggesting that COBRA facilitates cellulose crystallization from the emerging β1-4-glucan chains by acting as a "polysaccharide chaperone."

Indexed as

ArabidopsisArabidopsis ProteinsCell MembraneCelluloseCell WallCrystallizationGlucansMembrane GlycoproteinsMolecular ImagingProtein Transport1,4-glucanArabidopsis ProteinsCelluloseCOB protein, ArabidopsisGlucansMembrane GlycoproteinsArabidopsis COBRACelluloseCellulose BiosynthesisIsothermal Titration Calorimetry (ITC)Plant BiochemistryPlant Cell WallSolid State NMR

Identifiers

PMID25331944
PMCPMC4263889
OpenAlexW1989057432

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.