2VGN

Structure of S. cerevisiae Dom34, a translation termination-like factor involved in RNA quality control pathways and interacting with Hbs1 (SelenoMet-labeled protein)

Summary for 2VGN

• Entry DOI: 10.2210/pdb2vgn/pdb
• Related: 2VGM
• Descriptor: DOM34, GLYCEROL, PHOSPHATE ION, ... (4 entities in total)
• Functional Keywords: translation termination factor, protein biosynthesis, translation regulation, cell division, mrna degradation, nucleotide binding, mitosis, meiosis, cytoplasm, cell cycle, no-go decay
• Biological source: Saccharomyces cerevisiae (BAKER'S YEAST)
• Cellular location: Cytoplasm : P33309
• Total number of polymer chains: 2
• Total formula weight: 89456.64

Authors

Graille, M.,Chaillet, M.,Van Tilbeurgh, H. (deposition date: 2007-11-14, release date: 2008-01-22, Last modification date: 2024-11-13)

Primary citation

Graille, M.,Chaillet, M.,Van Tilbeurgh, H.
Structure of Yeast Dom34: A Protein Related to Translation Termination Factor Erf1 and Involved in No-Go Decay.
J.Biol.Chem., 283:7145-, 2008

PubMed Abstract: The yeast protein Dom34 has been described to play a critical role in a newly identified mRNA decay pathway called No-Go decay. This pathway clears cells from mRNAs inducing translational stalls through endonucleolytic cleavage. Dom34 is related to the translation termination factor eRF1 and physically interacts with Hbs1, which is itself related to eRF3. We have solved the 2.5-A resolution crystal structure of Saccharomyces cerevisiae Dom34. This protein is organized in three domains with the central and C-terminal domains structurally homologous to those from eRF1. The N-terminal domain of Dom34 is different from eRF1. It adopts a Sm-fold that is often involved in the recognition of mRNA stem loops or in the recruitment of mRNA degradation machinery. The comparison of eRF1 and Dom34 domains proposed to interact directly with eRF3 and Hbs1, respectively, highlights striking structural similarities with eRF1 motifs identified to be crucial for the binding to eRF3. In addition, as observed for eRF1 that enhances eRF3 binding to GTP, the interaction of Dom34 with Hbs1 results in an increase in the affinity constant of Hbs1 for GTP but not GDP. Taken together, these results emphasize that eukaryotic cells have evolved two structurally related complexes able to interact with ribosomes either paused at a stop codon or stalled in translation by the presence of a stable stem loop and to trigger ribosome release by catalyzing chemical bond hydrolysis.

PubMed: 18180287
DOI: 10.1074/JBC.M708224200

Experimental method

X-RAY DIFFRACTION (2.505 Å)