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TitleCryo-EM structure of wheat ribosome reveals unique features of the plant ribosomes.
Journal, issue, pagesStructure, Vol. 32, Issue 5, Page 562-574.e3, Year 2024
Publish dateMay 2, 2024
AuthorsRishi Kumar Mishra / Prafful Sharma / Faisal Tarique Khaja / Adwaith B Uday / Tanweer Hussain /
PubMed AbstractPlants being sessile organisms exhibit unique features in ribosomes, which might aid in rapid gene expression and regulation in response to varying environmental conditions. Here, we present high- ...Plants being sessile organisms exhibit unique features in ribosomes, which might aid in rapid gene expression and regulation in response to varying environmental conditions. Here, we present high-resolution structures of the 60S and 80S ribosomes from wheat, a monocot staple crop plant (Triticum aestivum). While plant ribosomes have unique plant-specific rRNA modification (Cm1847) in the peptide exit tunnel (PET), the zinc-finger motif in eL34 is absent, and uL4 is extended, making an exclusive interaction network. We note differences in the eL15-helix 11 (25S) interaction, eL6-ES7 assembly, and certain rRNA chemical modifications between monocot and dicot ribosomes. In eukaryotes, we observe highly conserved rRNA modification (Gm75) in 5.8S rRNA and a flipped base (G1506) in PET. These features are likely involved in sensing or stabilizing nascent chain. Finally, we discuss the importance of the universal conservation of three consecutive rRNA modifications in all ribosomes for their interaction with A-site aminoacyl-tRNA.
External linksStructure / PubMed:38458197 / PubMed Central
MethodsEM (single particle)
Resolution2.71 - 2.88 Å
Structure data

36331

8jiv

EMDB-36331, PDB-8jiv:
Atomic structure of wheat ribosome reveals unique features of the plant ribosomes
Method: EM (single particle) / Resolution: 2.84 Å

36332

8jiw

EMDB-36332, PDB-8jiw:
Atomic structure of wheat ribosome reveals unique features of the plant ribosomes
Method: EM (single particle) / Resolution: 2.88 Å

EMDB-36333: Atomic structure of wheat ribosome reveals unique features of the plant ribosomes
Method: EM (single particle) / Resolution: 2.84 Å

EMDB-36334: Atomic structure of wheat ribosome reveals unique features of the plant ribosomes
Method: EM (single particle) / Resolution: 2.71 Å

Chemicals

ChemComp-K:
Unknown entry

ChemComp-MG:
Unknown entry

ChemComp-ZN:
Unknown entry

Source
  • triticum aestivum (bread wheat)
KeywordsRIBOSOME / Protein Synthesis Machinery / Eukaryotic Ribosome / Plant / TRANSLATION

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