Evidence map›Paper›PMID 16796672›Full record

ArticleMolecular microbiology2006

Antigenic variation by Borrelia hermsii occurs through recombination between extragenic repetitive elements on linear plasmids.

Qiyuan Dai, Blanca I Restrepo, Stephen F Porcella, Sandra J Raffel, Tom G Schwan, Alan G Barbour

Erratum issuedAbstract read
In one paragraph

Article in Molecular microbiology, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 77 papers.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed
–field-weighted citation impact
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

77 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Infection and immunity · 2025
    Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Biology · 2021
    Review
  14. Article
  15. Article
  16. Lyme Disease Pathogenesis.Current issues in molecular biology · 2021
    Review
  17. Pathogenesis of Relapsing Fever.Current issues in molecular biology · 2021
    Review
  18. Article
  19. Review
  20. Article

17 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Qiyuan DaiDepartment of Microbiology, University of California Irvine, Irvine, CA, USA.
Blanca I Restrepo
Stephen F Porcella
Sandra J Raffel
Tom G Schwan
Alan G Barbour

Funding

MOLECULAR BASIS OF BORRELIA PATHOGENESISR37AI024424 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI BARBOUR, ALAN G. · 2001 to 2010
$3.5M
MOLECULAR BASIS FOR INFECTION BY BORRELIA BURGDORFERIZ01AI000492 · NIAID · NIAID EXTRAMURAL ACTIVITIES · PI SCHWAN, TOM · 1987 to 2008
$1.5M
MOLECULAR BASIS OF BORRELIA PATHOGENESISR01AI024424 · NIAID · UNIVERSITY OF TEXAS HLTH SCI CTR SAN ANT · PI BARBOUR, ALAN G. · 1987 to 2000
$339k
Intramural NIH HHSNIAID NIH HHS AI24424NIAID NIH HHS R01 AI024424NIAID NIH HHS R37 AI024424
6 · The paper itself

Abstract

The relapsing fever agent Borrelia hermsii undergoes multiphasic antigenic variation through gene conversion of a unique expression site on a linear plasmid by an archived variable antigen gene. To further characterize this mechanism we assessed the repertoire and organization of archived variable antigen genes by sequencing approximately 85% of plasmids bearing these genes. Most archived genes shared with the expressed gene a <or= 62 nucleotide (nt) region, the upstream homology sequence (UHS), that surrounded the start codon. The 59 archived variable antigen genes were arrayed in clusters with 13 repetitive, 214 nt long downstream homology sequence (DHS) elements distributed among them. A fourteenth DHS element was downstream of the expression locus. Informative nucleotide polymorphisms in UHS regions and DHS elements were applied to the analysis of the expression site of relapse serotypes from 60 infected mice in a prospective study. For most recombinations, the upstream crossover occurred in the UHS's second half, and the downstream crossover was in the DHS's second half. Usually the closest archival DHS element was used, but occasionally a more distant DHS was employed. The downstream extragenic crossover site in B. hermsii contrasts with the upstream [corrected] extragenic crossover site for antigenic variation in African trypanosomes.

Indexed as

Crossing Over, GeneticAntigenic VariationBase SequenceBorreliaDNA, BacterialDNA, CircularMolecular Sequence DataPlasmidsRecombination, GeneticRepetitive Sequences, Nucleic AcidDNA, BacterialDNA, Circular

Identifiers

PMID16796672
PMCPMC5614446

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.