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Udgivet

The identification and functional annotation of RNA structures conserved in vertebrates

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  • Stefan E Seemann
  • Aashiq H Mirza
  • Claus Hansen
  • Claus H Bang-Berthelsen
  • Christian Garde
  • Mikkel Christensen-Dalsgaard
  • Elfar Torarinsson
  • Zizhen Yao
  • Christopher T Workman
  • Flemming Pociot
  • Henrik Nielsen
  • Niels Tommerup
  • Walter L Ruzzo
  • Jan Gorodkin
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Structured elements of RNA molecules are essential in, e.g., RNA stabilization, localization, and protein interaction, and their conservation across species suggests a common functional role. We computationally screened vertebrate genomes for conserved RNA structures (CRSs), leveraging structure-based, rather than sequence-based, alignments. After careful correction for sequence identity and GC content, we predict ∼516,000 human genomic regions containing CRSs. We find that a substantial fraction of human-mouse CRS regions (1) colocalize consistently with binding sites of the same RNA binding proteins (RBPs) or (2) are transcribed in corresponding tissues. Additionally, a CaptureSeq experiment revealed expression of many of our CRS regions in human fetal brain, including 662 novel ones. For selected human and mouse candidate pairs, qRT-PCR and in vitro RNA structure probing supported both shared expression and shared structure despite low abundance and low sequence identity. About 30,000 CRS regions are located near coding or long noncoding RNA genes or within enhancers. Structured (CRS overlapping) enhancer RNAs and extended 3' ends have significantly increased expression levels over their nonstructured counterparts. Our findings of transcribed uncharacterized regulatory regions that contain CRSs support their RNA-mediated functionality.

OriginalsprogEngelsk
TidsskriftGenome Research
Vol/bind27
Udgave nummer8
Sider (fra-til)1371-1383
Antal sider13
ISSN1088-9051
DOI
StatusUdgivet - aug. 2017

ID: 52370953