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Footprints of a trypanosomatid RNA world: pre-small subunit rRNA processing by spliced leader addition trans-splicing

Overview of attention for article published in Memórias do Instituto Oswaldo Cruz, June 2012
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Title
Footprints of a trypanosomatid RNA world: pre-small subunit rRNA processing by spliced leader addition trans-splicing
Published in
Memórias do Instituto Oswaldo Cruz, June 2012
DOI 10.1590/s0074-02762012000400013
Pubmed ID
Authors

Mario Gustavo Mayer, Marcos Gonzaga dos Santos, Maria Fernanda Laranjeira da Silva, Lucile Maria Floeter-Winter

Abstract

The addition of a capped mini-exon [spliced leader (SL)] through trans-splicing is essential for the maturation of RNA polymerase (pol) II-transcribed polycistronic pre-mRNAs in all members of the Trypanosomatidae family. This process is an inter-molecular splicing reaction that follows the same basic rules of cis-splicing reactions. In this study, we demonstrated that mini-exons were added to precursor ribosomal RNA (pre-rRNA) are transcribed by RNA pol I, including the 5' external transcribed spacer (ETS) region. Additionally, we detected the SL-5'ETS molecule using three distinct methods and located the acceptor site between two known 5'ETS rRNA processing sites (A' and A1) in four different trypanosomatids. Moreover, we detected a polyadenylated 5'ETS upstream of the trans-splicing acceptor site, which also occurs in pre-mRNA trans-splicing. After treatment with an indirect trans-splicing inhibitor (sinefungin), we observed SL-5'ETS decay. However, treatment with 5-fluorouracil (a precursor of RNA synthesis that inhibits the degradation of pre-rRNA) led to the accumulation of SL-5'ETS, suggesting that the molecule may play a role in rRNA degradation. The detection of trans-splicing in these molecules may indicate broad RNA-joining properties, regardless of the polymerase used for transcription.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 26 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 26 100%

Demographic breakdown

Readers by professional status Count As %
Professor > Associate Professor 7 27%
Student > Ph. D. Student 6 23%
Researcher 4 15%
Student > Bachelor 2 8%
Student > Master 1 4%
Other 2 8%
Unknown 4 15%
Readers by discipline Count As %
Biochemistry, Genetics and Molecular Biology 9 35%
Agricultural and Biological Sciences 8 31%
Chemistry 2 8%
Medicine and Dentistry 2 8%
Immunology and Microbiology 1 4%
Other 0 0%
Unknown 4 15%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 07 January 2014.
All research outputs
#20,655,488
of 25,371,288 outputs
Outputs from Memórias do Instituto Oswaldo Cruz
#1,185
of 1,502 outputs
Outputs of similar age
#139,926
of 179,218 outputs
Outputs of similar age from Memórias do Instituto Oswaldo Cruz
#9
of 14 outputs
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