Evidence map›Paper›PMID 21596746›Full record

ArticleThe Journal of biological chemistry2011

Characterization of a dipartite iron uptake system from uropathogenic Escherichia coli strain F11.

Doreen Koch, Anson C K Chan, Michael E P Murphy, Hauke Lilie, Gregor Grass, Dietrich H Nies

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.6field-weighted citation impact, top 16% 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

23 citing papers in PubMed, 59 citations in OpenAlex.

  1. Review
  2. Dissecting components of theMicrobiology spectrum · 2024
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  5. Crystal structure and metal binding properties of the periplasmic iron component EfeM from Pseudomonas syringae EfeUOB/M iron-transport system.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2022
    Article
  6. Article
  7. Article
  8. Investigating the roles of the conserved CuJournal of inorganic biochemistry · 2020
    Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Review
  16. Review
  17. Article
  18. Iron homeostasis in theAdvances in botanical research · 2013
    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 3 institutions in 4 countries.

Doreen KochMolecular Microbiology, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Strasse 3, 06120 Halle/Saale, Germany.
Anson C K Chan
Michael E P Murphy
Hauke Lilie
Gregor Grass
Dietrich H Nies
Martin Luther University Halle-Wittenberg · DEUniversity of British Columbia · CAInstitut für Mikrobiologie der Bundeswehr

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In the uropathogenic Escherichia coli strain F11, in silico genome analysis revealed the dicistronic iron uptake operon fetMP, which is under iron-regulated control mediated by the Fur regulator. The expression of fetMP in a mutant strain lacking known iron uptake systems improved growth under iron depletion and increased cellular iron accumulation. FetM is a member of the iron/lead transporter superfamily and is essential for iron uptake by the Fet system. FetP is a periplasmic protein that enhanced iron uptake by FetM. Recombinant FetP bound Cu(II) and the iron analog Mn(II) at distinct sites. The crystal structure of the FetP dimer reveals a copper site in each FetP subunit that adopts two conformations: CuA with a tetrahedral geometry composed of His(44), Met(90), His(97), and His(127), and CuB, a second degenerate octahedral geometry with the addition of Glu(46). The copper ions of each site occupy distinct positions and are separated by ∼1.3 Å. Nearby, a putative additional Cu(I) binding site is proposed as an electron source that may function with CuA/CuB displacement to reduce Fe(III) for transport by FetM. Together, these data indicate that FetMP is an additional iron uptake system composed of a putative iron permease and an iron-scavenging and potentially iron-reducing periplasmic protein.

Indexed as

Cation Transport ProteinsEscherichia coli ProteinsPeriplasmic ProteinsUropathogenic Escherichia coliBinding SitesCopperCrystallography, X-RayGene Expression Regulation, BacterialIon TransportIronManganeseOperonProtein MultimerizationProtein Structure, QuaternaryCation Transport ProteinsCopperEscherichia coli ProteinsIronManganesePeriplasmic Proteins

Identifiers

PMID21596746
PMCPMC3137103
OpenAlexW2133393608

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.