Evidence map›Paper›PMID 22925482›Full record

ArticleBMC genomics2012

Small interfering RNA-producing loci in the ancient parasitic eukaryote Trypanosoma brucei.

Christian Tschudi, Huafang Shi, Joseph B Franklin, Elisabetta Ullu

Open access · goldAbstract read
In one paragraph

Article in BMC genomics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
3.1field-weighted citation impact, top 9% 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

24 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
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  3. Review
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  9. Article
  10. Review
  11. Article
  12. Article
  13. The evolutionary journey of Argonaute proteins.Nature structural & molecular biology · 2014
    Review
  14. Article
  15. Article
  16. The CAF1-NOT complex of trypanosomes.Frontiers in genetics · 2014
    Review
  17. Article
  18. Article
  19. Article
  20. Review
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.

Christian TschudiDepartment of Internal Medicine, School of Medicine, Yale University, New Haven, CT 06536, USA.
Huafang Shi
Joseph B Franklin
Elisabetta Ullu
Yale University · US

Funding

TRANSCRIPTION AND RNA PROCESSING IN TRYPANOSOMESR01AI028798 · NIAID · YALE UNIVERSITY · PI TSCHUDI, CHRISTIAN · 1990 to 2020
$10.9M
SMALL RNAS AND THEIR ROLE IN TRYPANOSOME BIOLOGYR01AI056333 · NIAID · YALE UNIVERSITY · PI ULLU, ELISABETTA · 2003 to 2012
$3.3M
RNA METABOLISM IN TRYPANOSOMESR37AI028798 · NIAID · YALE UNIVERSITY · PI ULLU, ELISABETTA · 2010 to 2013
$2.9M
NIAID NIH HHS AI28798NIAID NIH HHS AI56333NIAID NIH HHS R01 AI056333NIAID NIH HHS R37 AI028798
6 · The paper itself

Abstract

backgroundAt the core of the RNA interference (RNAi) pathway in Trypanosoma brucei is a single Argonaute protein, TbAGO1, with an established role in controlling retroposon and repeat transcripts. Recent evidence from higher eukaryotes suggests that a variety of genomic sequences with the potential to produce double-stranded RNA are sources for small interfering RNAs (siRNAs).

resultsTo test whether such endogenous siRNAs are present in T. brucei and to probe the individual role of the two Dicer-like enzymes, we affinity purified TbAGO1 from wild-type procyclic trypanosomes, as well as from cells deficient in the cytoplasmic (TbDCL1) or nuclear (TbDCL2) Dicer, and subjected the bound RNAs to Illumina high-throughput sequencing. In wild-type cells the majority of reads originated from two classes of retroposons. We also considerably expanded the repertoire of trypanosome siRNAs to encompass a family of 147-bp satellite-like repeats, many of the regions where RNA polymerase II transcription converges, large inverted repeats and two pseudogenes. Production of these newly described siRNAs is strictly dependent on the nuclear DCL2. Notably, our data indicate that putative centromeric regions, excluding the CIR147 repeats, are not a significant source for endogenous siRNAs.

conclusionsOur data suggest that endogenous RNAi targets may be as evolutionarily old as the mechanism itself.

Indexed as

Argonaute ProteinsGenetic LociInverted Repeat SequencesProtozoan ProteinsRetroelementsRibonuclease IIIRNA InterferenceRNA, Small InterferingTrypanosoma brucei bruceiArgonaute ProteinsProtozoan ProteinsRetroelementsRibonuclease IIIRNA, Small Interfering

Identifiers

PMID22925482
PMCPMC3447711
OpenAlexW2105093394

What OpenQuestion holds

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LicenceCC BY
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.