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Le Roch Lab
Ring-stage Plasmodium parasites inside red blood cells

Research

RNA Binding Proteins & RNA Biology

The question

The message between the gene and the protein.

Deciphering the role of long non-coding RNAs and RNA-binding proteins in gene regulation, and how they shape the transcriptome across the parasite life cycle.

Transcription explains only part of what the parasite does. Between a gene switching on and a protein appearing, transcripts are bound, stabilised, moved and silenced — and in these parasites that layer carries an unusual share of the regulation, holding messages made at one stage in reserve until the next.

We map it from two directions. Proteome-wide screens identify which proteins bind RNA at all, including a family of RAP proteins with roles in the apicoplast and the mitoribosome; eCLIP-seq and ChIRP-seq then pin individual proteins and long non-coding RNAs to the transcripts and genomic sites they occupy. The lncRNA catalogue that came out of that work is now being tested for function rather than presence.

RNA-binding proteins bound to polyadenylated transcripts around a cell nucleus, illustrating post-transcriptional regulation
RNA-binding proteins on polyadenylated transcripts around the nucleus: the post-transcriptional layer, mapped proteome-wide and then resolved transcript by transcript.

How we look

Techniques used in this area

RNA–protein interaction

  • eCLIP-seq
  • ChIRP-seq
  • Proteomics
  • MudPIT mass spectrometry

Transcriptome

  • RNA-seq
  • CRISPR

Platforms

  • Illumina
  • Oxford Nanopore
  • PacBio