4 research departments
750 employees
45 nationalities
55 research teams
16 ERC laureates
260 publications per year
24000 m² lab area

Support us through

Fondation universite de Strasbourg

Communication Service

Tél. +33(0) 3 88 65 35 47

Quick Links

Science & society

Key figures 2014

11 ERC grants
16 prizes and distinctions
3 public events
23 major scientific news

Scientific news

Crystal structure of the eucaryotic ribosome

View of the structure of the yeast ribosome: the small subunit is shown in blue whereas the large subunit is shown in yellow. Ribosomal RNA is shown in red.

Crystal structure of the eukaryotic ribosome

Ben-Shem A., Jenner L., Yusupova G., Yusupov M.

Science Nov. 26, 2010


Nov. 25, 2010

One year after the Nobel Prize in chemistry was awarded for the discovery of the bacterial ribosome's atomic structure, French researchers from the Institut de Genetique et de Biologie Moleculaire et Cellulaire have determined the first structure of a eukaryotic ribosome, that of yeast. This work, published on 26 November 2010 in the journal Science, puts an end to the frantic international race to discover the structure of this imposing cellular machinery.

The eukaryotic ribosome is at present the largest biological asymmetric molecule whose structure has been elucidated by crystallography. These results provide new research leads to enhance our understanding of the dynamics of protein synthesis in order to develop new therapeutic compounds.
The ribosome, a complex “nanomachine”
The ribosome is a vital machine of the cell, which ensures protein synthesis from genetic information. It interacts with numerous proteins and plays a key role in various cellular processes. Researchers have for many years been attempting to determine its atomic structure, a considerable challenge given its size and complexity. The bacterial ribosome has a structure similar but not identical to that of the eukaryotic ribosome (non bacterial). It is smaller, only 2.3 MDa, compared to 3.3 MDa for the eukaryotic ribosome) but has the same general organization into two subunits. In 2009, the Nobel Prize in chemistry was awarded to the researchers who were the first to determine the structure of the bacterial ribosome. Since then, there has been a frantic race to elucidate the structure of its eukaryotic counterpart.
Determining the structure of the eukaryotic ribosome: a difficult task
To determine the structure of the eukaryotic ribosome, the researchers focused on that of yeast, an ideal model organism already known and widely used in biology. With a mass of around 3.3 MDa, the eukaryotic ribosome is 40% larger than its bacterial counterpart. After a long molecular purification and stabilization process, the Strasbourg researchers finally obtained its atomic structure with very good resolution of 0.415 nanometers, i.e. a resolution on the molecular scale. The team from the Institut de Génétique et de Biologie Moléculaire et Cellulaire confirmed the existence of movements, not only within the ribosomal subunits but also between each other, highlighting the oscillatory dynamics behind the protein synthesis mechanism.
Promising results
The team's next objective is to determine the structure of other eukaryotes' ribosomes and further improve the resolution of the results so as to obtain a description of the ribosome and of the mechanisms that take place therein at the atomic scale. Elucidating this structure will facilitate our understanding of structure/function relations at the atomic scale and provide the molecular bases to investigate the unique characteristics of eukaryotic translational machinery. Such a description would also provide precious information for the development of new therapeutic compounds targeting viruses, protozoa (malaria, sleeping sickness, toxoplasmosis, etc.), fungi and bacteria. In fact, blocking the ribosome of these organisms would block their activity as a whole.

Imprimer Envoyer

Université de Strasbourg
INSERM
CNRS

IGBMC - CNRS UMR 7104 - Inserm U 964
1 rue Laurent Fries / BP 10142 / 67404 Illkirch CEDEX / France Tél +33 (0)3 88 65 32 00 / Fax +33 (0)3 88 65 32 01 / directeur.igbmc@igbmc.fr