Evidence map›Paper›PMID 9770495›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1998

Natural genetic exchange between Haemophilus and Neisseria: intergeneric transfer of chromosomal genes between major human pathogens.

J S Kroll, K E Wilks, J L Farrant, P R Langford

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed
5.4field-weighted citation impact, top 4% 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

67 citing papers in PubMed, 154 citations in OpenAlex.

  1. CommensalAnnual review of microbiology · 2025
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  6. Why is manganese so valuable to bacterial pathogens?Frontiers in cellular and infection microbiology · 2023
    Review
  7. Limitation ofJournal of clinical microbiology · 2022
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  11. Atypical, Yet Not Infrequent, Infections withPathogens (Basel, Switzerland) · 2019
    Review
  12. Article
  13. Article
  14. Article
  15. NontypeableProceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Inflammatory response of Haemophilus influenzae biotype aegyptius causing Brazilian Purpuric Fever.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2014
    Article

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

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

4 authors at 1 institution in 1 country.

J S KrollMolecular Infectious Diseases Group, Imperial College School of Medicine, Department of Paediatrics, St Mary's Hospital, Norfolk Place, London W2 1PG, United Kingdom. s.kroll@ic.ac.uk
K E Wilks
J L Farrant
P R Langford
Massachusetts Institute of Technology · US

Funding

MICROBIAL PATHOGEN GENOME PROJECT--NEISSERIA GONORRHOEAER01AI038399 · NIAID · UNIVERSITY OF OKLAHOMA HLTH SCIENCES CTR · PI DYER, DAVID W. · 1995 to 1998
–
NIAID NIH HHS AI38399
6 · The paper itself

Abstract

Members of the bacterial families Haemophilus and Neisseria, important human pathogens that commonly colonize the nasopharynx, are naturally competent for DNA uptake from their environment. In each genus this process is discriminant in favor of its own and against foreign DNA through sequence specificity of DNA receptors. The Haemophilus DNA uptake apparatus binds a 29-bp oligonucleotide domain containing a highly conserved 9-bp core sequence, whereas the neisserial apparatus binds a 10-bp motif. Each motif ("uptake sequence", US) is highly over-represented in the chromosome of the corresponding genus, particularly concentrated with core sequences in inverted pairs forming gene terminators. Two Haemophilus core USs were unexpectedly found forming the terminator of sodC in Neisseria meningitidis (meningococcus), and sequence analysis strongly suggests that this virulence gene, located next to IS1106, arose through horizontal transfer from Haemophilus. By using USs as search strings in a computer-based analysis of genome sequence, it was established that while USs of the "wrong" genus do not occur commonly in Neisseria or Haemophilus, where they do they are highly likely to flag domains of chromosomal DNA that have been transferred from Haemophilus. Three independent domains of Haemophilus-like DNA were found in the meningococcal chromosome, associated respectively with the virulence gene sodC, the bio gene cluster, and an unidentified orf. This report identifies intergenerically transferred DNA and its source in bacteria, and further identifies transformation with heterologous chromosomal DNA as a way of establishing potentially important chromosomal mosaicism in these pathogenic bacteria.

Indexed as

Genes, BacterialGene Transfer, HorizontalBase SequenceEscherichia coliHaemophilus influenzaeHumansMolecular Sequence DataNeisseria meningitidis

Identifiers

PMID9770495
PMCPMC22840
OpenAlexW2170846381

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.