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Structure paper

TitleCryo-EM structure of the Arabidopsisthaliana ribosome in translating and non-translating states.
Journal, issue, pagesStructure, Year 2026
Publish dateJun 26, 2026
AuthorsSudeep Karki / Xun Lu / Anja O Paatero / Raili Ruonala / Dale Tranter / Sergey Guryanov / Shahid Rehan / Eva Hellmann / Anders Haakonsson / Sarah J Butcher / Juha T Huiskonen / Tommi Kajander / Yrjö Helariutta / Ville O Paavilainen /
PubMed AbstractTranslational control of mRNA expression underpins much of post-transcriptional gene expression driving developmental processes in eukaryotes. How ribosomal mRNA translation is executed in plants may ...Translational control of mRNA expression underpins much of post-transcriptional gene expression driving developmental processes in eukaryotes. How ribosomal mRNA translation is executed in plants may be especially important for adapting to an ever-changing environment. Arabidopsis thaliana is the main genetic model organism in plant science, yet structural insights into developmental processes where ribosomal gene expression plays important roles currently remain lacking. Here, we present cryoelectron microscopy (cryo-EM) structures of the Arabidopsis cytosolic ribosome in both translating and non-translating states, which together provide new structural details into how translation of cytosolic mRNAs is coordinated. Our structures reveal detailed information on the interactions of tRNAs, mRNA, and the nascent polypeptide with subunits of the actively translating 80S ribosome and the role of ribosomal RNA methylation in stabilizing ribosomal subunits. The structures provide a foundation for interpreting the functional effects of many mutations of ribosomal proteins affecting phenotypic effects for plant tissue development.
External linksStructure / PubMed:42361795
MethodsEM (single particle)
Resolution2.9 - 3.3 Å
Structure data

54774

9scu

EMDB-54774, PDB-9scu:
Cryo-EM structure of the Arabidopsis thaliana 60S ribosomal subunit
Method: EM (single particle) / Resolution: 2.9 Å

54789

9sdp

EMDB-54789, PDB-9sdp:
Cryo-EM structure of the Arabidopsis thaliana 40S ribosomal subunit
Method: EM (single particle) / Resolution: 3.3 Å

54790

9sdq

EMDB-54790, PDB-9sdq:
Cryo-EM structure of the Arabidopsis thaliana 40S ribosomal subunit (Head)
Method: EM (single particle) / Resolution: 3.2 Å

EMDB-55387: Cryo-EM structure of arabidopsis translating ribosome
Method: EM (single particle) / Resolution: 3.16 Å

EMDB-55388: Cryo-EM of arabidopsis non-translatin ribosome structure
Method: EM (single particle) / Resolution: 3.07 Å

Chemicals

ChemComp-K:
Unknown entry

ChemComp-MG:
Unknown entry

ChemComp-ZN:
Unknown entry

Source
  • Arabidopsis (plant)
  • arabidopsis thaliana (thale cress)
KeywordsRIBOSOME / Arabidopsis / CryoEM / Ribosomal 40S subunit -Head region

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