Notes
Slide Show
Outline
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Non-coding RNA
or the
“art of genome maintenance”
  • Igor Makunin


  • Institute for Molecular Bioscience, University of Queensland
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Regulation nightmare of eukaryotes
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Protein-Coding Gene count in genomes
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Most of the human genome is non-coding
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How eukaryotes overcome small gene number
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Why is RNA so attractive?
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Digital RNA network
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Parallel output hypothesis
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Functions of trans-acting RNA signals
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Epigenetic modification
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Heterochromatin formation depends on ncRNA
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Transcription
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RNA modification: small nucleolar RNAs
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Alternative splicing
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MicroRNAs regulate translation and mRNA decay
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The miRs might participate in Notch pathway
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Validation of miRs targets in Notch pathway
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MicroRNA-Directed Cleavage of HOXB8 mRNA
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Anti-sense transcripts in human HOX clusters
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Mouse has similar transcript
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Short RNAs from C. elegans
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Three major sources of ncRNA in genome:
non-coding genes, anti-sense transcripts and introns
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Mouse has thousands non-coding genes
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Why has this system gone unnoticed?
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Non-coding RNA db at the IMB
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Unusual regions
in vertebrate genomes:
ultra-conserved elements
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Ultra-Conserved part of genome
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We used very stringent criteria
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The 1045 bp element in POLA gene
(human, mouse, rat, dog and chicken)
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Evolution Slowed for 300+ M Years
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UC elements are clustered on chromosomes
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Most UC elements are non-coding but transcribed
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UC elements associate with regulatory genes
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Summary
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Acknowledgments