Evidence map›Paper›PMID 9632627›Full record

ArticleInfection and immunity1998

Multigene families encoding the major hemagglutinins in phylogenetically distinct mycoplasmas.

A H Noormohammadi, P F Markham, M F Duffy, K G Whithear, G F Browning

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1998. 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
2.6field-weighted citation impact, top 11% 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, 91 citations in OpenAlex.

  1. Article
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  5. Frontiers in microbiology · 2023
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  7. Comparative Genomics ofFrontiers in veterinary science · 2021
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  19. Phase and antigenic variation in bacteria.Clinical microbiology reviews · 2004
    Review
  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

5 authors at 1 institution in 1 country.

A H NoormohammadiSchool of Veterinary Science, The University of Melbourne, Parkville, Victoria, Australia 3052.
P F Markham
M F Duffy
K G Whithear
G F Browning
University of Melbourne · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mycoplasma synoviae has two major membrane antigens, MSPA and MSPB, both of which are phase variable and which may be coordinately involved in adhesion of the organism to erythrocytes. A single gene (vlhA) from M. synoviae was characterized, and polypeptides were expressed from nonoverlapping 5' and 3' regions in Escherichia coli. The expression product of the vlhA 5' region reacted with specific reagents against MSPB, while that of the 3' region reacted with specific reagents against MSPA. Analysis of the predicted amino acid sequence showed a characteristic signal peptidase II cleavage site, and the presence of the acylation site was confirmed by identification of a lipid-associated membrane protein, similar in molecular mass to MSPB, in [3H]palmitate-labelled membrane proteins. Further sequence analysis of the vlhA gene revealed a high identity with the Mycoplasma gallisepticum pMGA1.7 gene, a member of a large translated family. The vlhA gene was shown to hybridize to multiple restriction fragments of the M. synoviae genome, suggesting that it was also a member of a multigene family. These findings indicate that coordinate phase variation of the two major surface antigens of M. synoviae WVU may be due to their expression from the same gene and that homologous gene families encode the major hemagglutinins of two phylogenetically distinct mycoplasmas. The presence of homologous multigene families in such phylogenetically distinct species, but not in the genomes of more closely related species, suggests that the families may have been transferred horizontally.

Indexed as

Genes, BacterialMultigene FamilyAmino Acid SequenceAntigens, BacterialAntigens, SurfaceBase SequenceBlotting, SouthernHemagglutininsLipoproteinsMolecular Sequence DataMycoplasmaPhylogenyPolymerase Chain ReactionAntigens, BacterialAntigens, SurfaceHemagglutininsLipoproteins

Identifiers

PMID9632627
PMCPMC108374
OpenAlexW2117587459

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.