Evidence map›Paper›PMID 18596255›Full record

ArticleRNA (New York, N.Y.)2008

Spliceosomal snRNAs in the unicellular eukaryote Trichomonas vaginalis are structurally conserved but lack a 5'-cap structure.

Augusto Simoes-Barbosa, Dionigia Meloni, James A Wohlschlegel, Maria M Konarska, Patricia J Johnson

Open access · bronzeAbstract read
In one paragraph

Article in RNA (New York, N.Y.), 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
2.8field-weighted citation impact, top 10% 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

21 citing papers in PubMed, 28 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Trichomoniasis: evaluation to execution.European journal of obstetrics, gynecology, and reproductive biology · 2011
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Regulation of gene expression in protozoa parasites.Journal of biomedicine & biotechnology · 2010
    Review
  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

5 authors at 2 institutions in 2 countries.

Augusto Simoes-BarbosaDepartment of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, California 90095-1489, USA.
Dionigia Meloni
James A Wohlschlegel
Maria M Konarska
Patricia J Johnson
University of California, Los Angeles · USRockefeller University · US

Funding

Mechanisms of pre mRNA SplicingR01GM049044 · NIGMS · ROCKEFELLER UNIVERSITY · PI KONARSKA, MAGDA · 1993 to 2012
$5.7M
Gene Expression in Trichomonas vaginalisR01AI030537 · NIAID · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI JOHNSON, PATRICIA JEAN · 1991 to 2008
$2.7M
NIAID NIH HHS AI30537NIAID NIH HHS R01 AI030537NIGMS NIH HHS GM49044NIGMS NIH HHS R01 GM049044
6 · The paper itself

Abstract

Few genes in the divergent eukaryote Trichomonas vaginalis have introns, despite the unusually large gene repertoire of this human-infective parasite. These introns are characterized by extended conserved regulatory motifs at the 5' and 3' boundaries, a feature shared with another divergent eukaryote, Giardia lamblia, but not with metazoan introns. This unusual characteristic of T. vaginalis introns led us to examine spliceosomal small nuclear RNAs (snRNAs) predicted to mediate splicing reactions via interaction with intron motifs. Here we identify T. vaginalis U1, U2, U4, U5, and U6 snRNAs, present predictions of their secondary structures, and provide evidence for interaction between the U2/U6 snRNA complex and a T. vaginalis intron. Structural models predict that T. vaginalis snRNAs contain conserved sequences and motifs similar to those found in other examined eukaryotes. These data indicate that mechanisms of intron recognition as well as coordination of the two catalytic steps of splicing have been conserved throughout eukaryotic evolution. Unexpectedly, we found that T. vaginalis spliceosomal snRNAs lack the 5' trimethylguanosine cap typical of snRNAs and appear to possess unmodified 5' ends. Despite the lack of a cap structure, U1, U2, U4, and U5 genes are transcribed by RNA polymerase II, whereas the U6 gene is transcribed by RNA polymerase III.

Indexed as

RNA SplicingAnimalsBase SequenceIntronsMolecular Sequence DataNucleic Acid ConformationRNA, ProtozoanRNA, Small NuclearSpliceosomesTrichomonas vaginalisRNA, ProtozoanRNA, Small Nuclear

Identifiers

PMID18596255
PMCPMC2491460
OpenAlexW2110171572

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.