Evidence map›Paper›PMID 8926061›Full record

ArticleInfection and immunity1996

The hemagglutinin gene A (hagA) of Porphyromonas gingivalis 381 contains four large, contiguous, direct repeats.

N Han, J Whitlock, A Progulske-Fox

Abstract read
In one paragraph

Article in Infection and immunity, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing 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

51 citing papers in PubMed.

  1. Virulence diversity amongJournal of oral microbiology · 2026
    Review
  2. Review
  3. TrkA serves as a virulence modulator inFrontiers in cellular and infection microbiology · 2022
    Article
  4. Article
  5. Molecular mechanisms ofThe Japanese dental science review · 2017
    Review
  6. New approaches to combatJournal of oral microbiology · 2017
    Review
  7. Genes Contributing toFrontiers in cellular and infection microbiology · 2017
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Article
  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

3 authors.

N HanDepartment of Oral Biology, University of Florida, Gainesville 32610-0424, USA. nhan@dental.ufl.edu
J Whitlock
A Progulske-Fox

Funding

SURFACE ANTIGENS OF ORAL BACTEROIDES SPECIESR01DE007496 · NIDCR · UNIVERSITY OF FLORIDA · PI PROGULSKE-FOX, ANN · 1991 to 2005
$1.4M
SURFACE ANTIGENS OF ORAL BACTEROIDS SPECIESK04DE000336 · NIDCR · UNIVERSITY OF FLORIDA · PI PROGULSKE-FOX, ANN · 1992 to 1995
–
SURFACE ANTIGENS OF ORAL BACTEROIDES GINGIVALISR23DE007496 · NIDCR · UNIVERSITY OF FLORIDA · PI PROGULSKE-FOX, ANN · 1986 to 1986
–
SURFACE ANTIGENS OF ORAL BACTEROIDES GINGIVALISR29DE007496 · NIDCR · UNIVERSITY OF FLORIDA · PI PROGULSKE-FOX, ANN · 1987 to 1990
–
NIDCR NIH HHS DE 00336NIDCR NIH HHS DE 07496
6 · The paper itself

Abstract

Porphyromonas gingivalis is a gram-negative anaerobic bacterial species strongly associated with adult periodontitis. One of its distinguishing characteristics and putative virulence properties is the ability to agglutinate erythrocytes. We have previously reported the cloning of multiple hemagglutinin genes from P. gingivalis 381. Subsequent sequencing of clone ST 2 revealed that the cloned fragment contained only an internal portion of the gene which lacked both start and stop codons. We here report the cloning and sequencing of the entire gene, designated hagA, as well as its relationship to other genes of this species. By use of inverse PCR technology and the construction of several additional genomic libraries, the complete open reading frame of hagA was found to be 7,887 bp in length, encoding a protein of 2,628 amino acids with a molecular mass of 283.3 kDa, which is among the largest genes ever cloned from a prokaryote to date. Within its open reading frame, four large, contiguous, direct repeats (varying from 1,318 to 1,368 bp) were identified. The repeat unit (HArep), which is assumed to contain the hemagglutinin domain, is also present in other recently reported protease and hemagglutinin genes in P. gingivalis. Thus, we propose that hagA and the other genes which share the HArep sequence form a multigene family with hagA as a central member.

Indexed as

Bacterial ProteinsGenes, BacterialRepetitive Sequences, Nucleic AcidAmino Acid SequenceBase SequenceHemagglutinationHemagglutininsLectinsMolecular Sequence DataPorphyromonas gingivalisBacterial Proteinshemagglutinin A, Porphyromonas gingivalisHemagglutininsLectins

Identifiers

PMID8926061
PMCPMC174329

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.