Skip to Content

Sponsors

No results

Tags

No results

Types

No results

Search Results

Events

No results
Search events using: keywords, sponsors, locations or event type
When / Where
All occurrences of this event have passed.
This listing is displayed for historical purposes.

Center for RNA Biomedicine pres.

RNA Innovation Seminar, Ruslan Afasizhev, Boston University Medical Campus

"RNA Editing Enzyme Machines"

flyer flyer
flyer
Ruslan Afasizhev, PhD, Professor, Molecular & Cell Biology, Boston University Medical Campus

Abstract: Parasitic protist Trypanosoma brucei causes African human and animal trypanosomiasis, a spectrum of diseases affecting the population and economy in sub-Saharan Africa. These digenetic hemoflagellates belong to Kinetoplastea, a taxonomic class distinguished by possession of a kinetoplast. This nucleoprotein body contains mitochondrial DNA of two kinds: ~25 maxicircles (each ~23kb) encoding ribosomal RNAs, two guide RNA (gRNAs), ribosomal proteins and subunits of respiratory complexes, and approximately 5000 of ~1kb minicircles bearing the majority of gRNA genes. Relaxed maxicircles and minicircles are interlinked and packed into a dense disc-shaped network by association with histone-like proteins. Both maxicircle and minicircle genomes are transcribed by a phage-like RNA polymerase from multiple promoters into 3′-extended precursors which undergo 3′-5′ exonucleolytic trimming. To function in mitochondrial translation, pre-mRNAs must further proceed through 3′ adenylation, and often gRNA-directed uridine insertion/deletion editing, and 3′ A/U-tailing. Ribosomal and guide RNAs are typically 3′ uridylated. Historically, the fascinating phenomenon of RNA editing has attracted major research efforts, but more recent developments provided insights into pre- and post-edited processing events and identified key players in transforming primary precursors into functional RNAs and regulating their turnover. I will present a forward-looking model that integrates known modalities of mitochondrial RNA metabolism.
Report Event As Inappropriate Contact Event Organizers
Back to Main Content