Evidence map›Paper›PMID 19617359›Full record

ArticleJournal of bacteriology2009

Cellular localization of predicted transmembrane and soluble chemoreceptors in Sinorhizobium meliloti.

Veronika M Meier, Birgit E Scharf

Abstract read
In one paragraph

Article in Journal of bacteriology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.1field-weighted citation impact, top 11% 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

22 citing papers in PubMed, 39 citations in OpenAlex.

  1. TheJournal of bacteriology · 2026
    Article
  2. Article
  3. Article
  4. The Only Chemoreceptor Encoded byMicroorganisms · 2021
    Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. An Updated Perspective onFrontiers in microbiology · 2020
    Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Internal sense of direction: sensing and signaling from cytoplasmic chemoreceptors.Microbiology and molecular biology reviews : MMBR · 2014
    Review
  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

2 authors at 1 institution in 1 country.

Veronika M MeierLehrstuhl für Genetik, Universität Regensburg, D-93040 Regensburg, Germany.
Birgit E Scharf
University of Regensburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bacterial chemoreceptors primarily locate in clusters at the cell pole, where they form large sensory complexes which recruit cytoplasmic components of the signaling pathway. The genome of the soil bacterium Sinorhizobium meliloti encodes seven transmembrane and two soluble chemoreceptors. We have investigated the localization of all nine chemoreceptors in vivo using genome-encoded fusions to a variant of the enhanced green fluorescent protein and to monomeric red fluorescent protein. Six of the transmembrane (McpT to McpX and McpZ) and both soluble (McpY and IcpA) receptors localize to the cell pole. Only McpS, encoded from the symbiotic plasmid pSymA, is evenly distributed in the cell. While the synthesis of all polar localized receptors is confined to exponential growth correlating with the motility phase of cells, McpS is only weakly expressed throughout cell culture growth. Therefore, motile S. meliloti cells form one major chemotaxis cluster that harbors all chemoreceptors except for McpS. Colocalization and deletion analysis demonstrated that formation of polar foci by the majority of receptors is dependent on other chemoreceptors and that receptor clusters are stabilized by the presence of the chemotaxis proteins CheA and CheW. The transmembrane McpV and the soluble IcpA localize to the pole independently of CheA and CheW. However, in mutant strains McpV formed delocalized polar caps that spread throughout the cell membrane while IcpA exhibited increased bipolarity. Immunoblotting of fractionated cells revealed that IcpA, which lacks any hydrophobic domains, nevertheless is associated to the cell membrane.

Indexed as

Cell PolarityChemotaxisBacterial ProteinsCell MembraneGene DeletionGene Expression Regulation, BacterialGreen Fluorescent ProteinsImmunoblottingLuminescent ProteinsMembrane ProteinsMethyl-Accepting Chemotaxis ProteinsMicroscopy, FluorescenceRed Fluorescent ProteinSinorhizobium melilotiBacterial Proteinsenhanced green fluorescent proteinGreen Fluorescent ProteinsLuminescent ProteinsMembrane ProteinsMethyl-Accepting Chemotaxis ProteinsRed Fluorescent Protein

Identifiers

PMID19617359
PMCPMC2737976
OpenAlexW2133074897

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.