Evidence map›Paper›PMID 16966408›Full record

ArticleInfection and immunity2006

Structure of the expression site reveals global diversity in MSP2 (P44) variants in Anaplasma phagocytophilum.

Anthony F Barbet, Anna M Lundgren, A Rick Alleman, Snorre Stuen, Anneli Bjöersdorff, Richard N Brown, Niki L Drazenovich, Janet E Foley

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
4.1field-weighted citation impact, top 6% 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

28 citing papers in PubMed, 58 citations in OpenAlex.

  1. Article
  2. Comparative Whole Genome Analysis of anPathogens (Basel, Switzerland) · 2022
    Article
  3. Article
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  5. Article
  6. Mini-review: Strategies for Variation and Evolution of Bacterial Antigens.Computational and structural biotechnology journal · 2015
    Review
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  11. Review
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  13. Review
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  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Diversity of Anaplasma phagocytophilum strains, USA.Emerging infectious diseases · 2009
    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

8 authors at 4 institutions in 2 countries.

Anthony F BarbetDepartment of Infectious Diseases and Pathology, University of Florida, Gainesville, FL 32611-0880, USA, and Department of Clinical Microbiology, Kalmar County Hospital, Sweden. barbeta@mail.vetmed.ufl.edu
Anna M Lundgren
A Rick Alleman
Snorre Stuen
Anneli Bjöersdorff
Richard N Brown
Niki L Drazenovich
Janet E Foley
University of California, Davis · USHumboldt State University · USLandstinget i Kalmar län · SEUniversity of Florida · US

Funding

MOLECULAR MECHANISMS OF MSP2 VARIATION IN RICKETTSIAER01AI045580 · NIAID · UNIVERSITY OF FLORIDA · PI BARBET, ANTHONY F. · 1999 to 2007
$2.0M
NIAID NIH HHS AI45580NIAID NIH HHS R01 AI045580
6 · The paper itself

Abstract

Anaplasma phagocytophilum, a recently reclassified bacteria in the order Rickettsiales, infects many different animal species and causes an emerging tick-borne disease of humans. The genome contains a large number of related genes and gene fragments encoding partial or apparently full-length outer membrane protein MSP2 (P44). Previous data using strains isolated from humans in the United States suggest that antigenic diversity results from RecF-mediated conversion of a single MSP2 (P44) expression site by partially homologous donor sequences. However, whether similar mechanisms operate in naturally infected animal species and the extent of global diversity in MSP2 (P44) are unknown. We analyzed the structure and diversity of the MSP2 (P44) expression site in strains derived from the United States and Europe and from infections of different animal species, including wildlife reservoirs. The results show that a syntenic expression site is present in all strains of A. phagocytophilum investigated. This genomic locus contained diverse MSP2 (P44) variants in all infected animals sampled, and variants also differed at different time points during infection. Although similar variants were found among different populations of U.S. origin, there was little sequence identity between U.S. strain variants (including genomic copies from a completely sequenced U.S. strain) and expression site variants infecting sheep and dogs in Norway and Sweden. Finally, the possibility that combinatorial mechanisms can generate additional diversity beyond the basic donor sequence repertoire is supported by the observation of shared sequence blocks throughout the MSP2 (P44) hypervariable region in reservoir hosts. These data suggest similar genetic mechanisms for A. phagocytophilum variation in all hosts but worldwide diversity of the MSP2 (P44) outer membrane protein.

Indexed as

Gene Expression Regulation, BacterialAmino Acid SequenceAnaplasma phagocytophilumAnimalsAntigenic VariationArvicolinaeBacterial Outer Membrane ProteinsHumansMolecular Sequence DataSheepUrsidaeBacterial Outer Membrane Proteinsmsp2 protein, Anaplasma phagocytophilum

Identifiers

PMID16966408
PMCPMC1695497
OpenAlexW2128178208

What OpenQuestion holds

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Read underepoch 390

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.