Evidence map›Paper›PMID 29075010›Full record

ArticleScientific reports2017

Helicobacter pylori chemoreceptor TlpC mediates chemotaxis to lactate.

Mayra A Machuca, Kevin S Johnson, Yu C Liu, David L Steer, Karen M Ottemann, Anna Roujeinikova

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
6.2field-weighted citation impact, top 3% 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

44 citing papers in PubMed, 76 citations in OpenAlex.

  1. Article
  2. Review
  3. Specificities of chemosensory receptors in the human gut microbiota.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  4. Article
  5. Article
  6. State-dependent motion of a genetically encoded fluorescent biosensor.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  7. Metabolic reprogramming inFrontiers in cellular and infection microbiology · 2025
    Review
  8. Article
  9. Article
  10. Identification of a dCache-type chemoreceptor inFrontiers in microbiology · 2024
    Article
  11. Article
  12. Bacterial chemotaxis in human diseases.Trends in microbiology · 2023
    Review
  13. Review
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  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

6 authors at 4 institutions in 2 countries.

Mayra A MachucaInfection and Immunity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia.
Kevin S JohnsonDepartment of Microbiology and Environmental Toxicology, University of California Santa Cruz, Santa Cruz, CA, 95064, USA.
Yu C LiuDepartment of Microbiology, Monash University, Clayton, Victoria, 3800, Australia.
David L SteerMonash Biomedical Proteomics Facility, Monash University, Clayton, Victoria, 3800, Australia.
Karen M OttemannDepartment of Microbiology and Environmental Toxicology, University of California Santa Cruz, Santa Cruz, CA, 95064, USA. ottemann@ucsc.edu.
Anna RoujeinikovaInfection and Immunity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia. anna.roujeinikova@monash.edu.ORCID 0000-0001-8478-4751
Monash University · AUUniversity of California, Santa Cruz · USAustralian Regenerative Medicine Institute · AUDiscovery Institute · US

Funding

The function of chemotactic signal transduction during colonization and diseaseR01AI116946 · NIAID · UNIVERSITY OF CALIFORNIA SANTA CRUZ · PI OTTEMANN, KAREN M · 2016 to 2025
$5.1M
NIAID NIH HHS R01 AI116946
6 · The paper itself

Abstract

It is recently appreciated that many bacterial chemoreceptors have ligand-binding domains (LBD) of the dCACHE family, a structure with two PAS-like subdomains, one membrane-proximal and the other membrane-distal. Previous studies had implicated only the membrane-distal subdomain in ligand recognition. Here, we report the 2.2 Å resolution crystal structure of dCACHE LBD of the Helicobacter pylori chemoreceptor TlpC. H. pylori tlpC mutants are outcompeted by wild type during stomach colonisation, but no ligands had been mapped to this receptor. The TlpC dCACHE LBD has two PAS-like subdomains, as predicted. The membrane-distal one possesses a long groove instead of a small, well-defined pocket. The membrane-proximal subdomain, in contrast, had a well-delineated pocket with a small molecule that we identified as lactate. We confirmed that amino acid residues making contact with the ligand in the crystal structure-N213, I218 and Y285 and Y249-were required for lactate binding. We determined that lactate is an H. pylori chemoattractant that is sensed via TlpC with a K

Indexed as

Bacterial ProteinsChemotaxisHelicobacter pyloriLactic AcidModels, MolecularMutagenesis, Site-DirectedProtein BindingProtein ConformationProtein DomainsBacterial ProteinsLactic Acid

Identifiers

PMID29075010
PMCPMC5658362
OpenAlexW2766498245

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.