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Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

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Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
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Related Experiment Video

Updated: Apr 19, 2026

Identification of Footprints of RNA:Protein Complexes via RNA Immunoprecipitation in Tandem Followed by Sequencing RIPiT-Seq
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Orthrus: toward evolutionary and functional RNA foundation models.

Philip Fradkin1,2, Ruian Ian Shi1,2,3, Taykhoom Dalal3

  • 1Vector Institute, Toronto, Ontario, Canada.

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|April 17, 2026
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Summary
This summary is machine-generated.

Orthrus, a novel foundation model for mature RNA, improves prediction of RNA properties. It leverages biological data and outperforms existing models, aiding transcript function and regulation understanding.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Predicting mature RNA properties from genomic data is challenging.
  • Existing foundation models lack biological domain knowledge for RNA tasks.

Purpose of the Study:

  • Introduce Orthrus, a Mamba-based foundation model for mature RNA.
  • Improve prediction of RNA properties and transcript function.

Main Methods:

  • Pretrained Orthrus using self-supervised contrastive learning with biological augmentations.
  • Maximized embedding similarity between splice isoforms and orthologous genes.
  • Utilized data from ten model organisms and 400+ mammalian species.

Main Results:

  • Orthrus' latent representation clusters RNA sequences by function and evolution.
  • Outperformed existing foundation models on mRNA property prediction.
  • Required significantly less fine-tuning data.

Conclusions:

  • Orthrus effectively captures functional and evolutionary similarities in RNA.
  • Demonstrates capability in discerning divergent biological functions of transcript isoforms.
  • Offers a powerful tool for RNA research and genomic data analysis.