EVENT : C3BI Seminars
Emergence of de novo protein coding genes from ‘dark genomic matter’ — fact or fiction?
Main speaker : Erich Bornberg-Bauer, from The Westfalian Wilhelms University of Muenster, Germany Date : 09/11/2017 at 02:00 pm Location : Auditorium Francois Jacob – BIME (26) ,Institut Pasteur, Paris
Proteins are the workhorses of the cell and, over billions of years,
they have evolved an amazing plethora of extremely diverse and versatile
structures with equally diverse functions. Therefore, their evolution
echoes the evolution of all forms of life. Evolutionary emergence of
new proteins and transitions between existing ones are widely believed
to be rare or even impossible.
However, recent advances in comparative genomics have repeatedly called some 10%-30% of all genes without any detectable similarity to existing proteins. Even after careful scrutiny, some of those “orphan” genes contain protein coding reading frames with detectable transcription and translation. Thus some proteins seem to have emerged from previously non-coding ‘dark genomic matter’. These ‘de novo’ proteins tend to be disordered, fast evolving, weakly expressed but also rapidly assuming novel and physiologically important functions. I will review mechanisms by which ‘de novo’ proteins might be created, under which circumstances they may become fixed and why they are elusive. I will present a couple of studies which mostly focus on metazoan genomes.
Due to security policy in Institut Pasteur, please register before if you plan to come to this meeting