8BHP

Elongating E. coli 70S ribosome containing acylated tRNA(iMet) in the P-site and m6AAA mRNA codon in the A-site after uncompleted di-peptide formation

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.37 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history. 


Literature

Modulation of translational decoding by m 6 A modification of mRNA.

Jain, S., Koziej, L., Poulis, P., Kaczmarczyk, I., Gaik, M., Rawski, M., Ranjan, N., Glatt, S., Rodnina, M.V.

(2023) Nat Commun 14: 4784-4784

  • DOI: https://doi.org/10.1038/s41467-023-40422-7
  • Primary Citation of Related Structures:  
    8BF7, 8BGE, 8BGH, 8BH4, 8BHJ, 8BHL, 8BHN, 8BHP, 8BIL, 8BIM

  • PubMed Abstract: 

    N 6 -methyladenosine (m 6 A) is an abundant, dynamic mRNA modification that regulates key steps of cellular mRNA metabolism. m 6 A in the mRNA coding regions inhibits translation elongation. Here, we show how m 6 A modulates decoding in the bacterial translation system using a combination of rapid kinetics, smFRET and single-particle cryo-EM. We show that, while the modification does not impair the initial binding of aminoacyl-tRNA to the ribosome, in the presence of m 6 A fewer ribosomes complete the decoding process due to the lower stability of the complexes and enhanced tRNA drop-off. The mRNA codon adopts a π-stacked codon conformation that is remodeled upon aminoacyl-tRNA binding. m 6 A does not exclude canonical codon-anticodon geometry, but favors alternative more dynamic conformations that are rejected by the ribosome. These results highlight how modifications outside the Watson-Crick edge can still interfere with codon-anticodon base pairing and complex recognition by the ribosome, thereby modulating the translational efficiency of modified mRNAs.

    • Organizational Affiliation: 

    Max Planck Institute for Multidisciplinary Sciences, Göttingen, 37077, Germany.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L2273Escherichia coli K-12Mutation(s): 0 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L3209Escherichia coli K-12Mutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L4201Escherichia coli K-12Mutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L5179Escherichia coli K-12Mutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L6177Escherichia coli K-12Mutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L9149Escherichia coli K-12Mutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L13142Escherichia coli K-12Mutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L14123Escherichia coli K-12Mutation(s): 0 
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50S ribosomal protein L15144Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L16136Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L17127Escherichia coli K-12Mutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L18117Escherichia coli K-12Mutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L19115Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L20118Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L21103Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L22110Escherichia coli K-12Mutation(s): 0 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L23100Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L24104Escherichia coli K-12Mutation(s): 0 
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Entity ID: 19
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L2594Escherichia coli K-12Mutation(s): 0 
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Entity ID: 20
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L2785Escherichia coli K-12Mutation(s): 0 
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Entity ID: 21
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L2878Escherichia coli K-12Mutation(s): 0 
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Entity ID: 22
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L2963Escherichia coli K-12Mutation(s): 0 
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Entity ID: 23
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L3059Escherichia coli K-12Mutation(s): 0 
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Entity ID: 24
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L3170Escherichia coli K-12Mutation(s): 0 
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Entity ID: 25
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L32Y [auth a]57Escherichia coli K-12Mutation(s): 0 
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Entity ID: 26
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L33Z [auth b]55Escherichia coli K-12Mutation(s): 0 
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Entity ID: 27
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L34AA [auth c]46Escherichia coli K-12Mutation(s): 0 
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Entity ID: 28
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L35BA [auth d]65Escherichia coli K-12Mutation(s): 0 
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Entity ID: 29
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L36CA [auth e]38Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S2DA [auth f]241Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S3EA [auth g]233Escherichia coli K-12Mutation(s): 0 
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Entity ID: 32
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S4FA [auth h]206Escherichia coli K-12Mutation(s): 0 
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Entity ID: 33
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S5GA [auth i]167Escherichia coli K-12Mutation(s): 0 
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Entity ID: 34
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S6HA [auth j]131Escherichia coli K-12Mutation(s): 0 
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Entity ID: 35
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S7IA [auth k]179Escherichia coli K-12Mutation(s): 0 
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Entity ID: 36
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S8JA [auth l]130Escherichia coli K-12Mutation(s): 0 
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Entity ID: 37
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S9KA [auth m]130Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S10LA [auth n]103Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S11MA [auth o]129Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S12NA [auth p]124Escherichia coli K-12Mutation(s): 0 
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MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S13OA [auth q]118Escherichia coli K-12Mutation(s): 0 
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Entity ID: 42
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S14PA [auth r]101Escherichia coli K-12Mutation(s): 0 
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Entity ID: 43
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S15QA [auth s]89Escherichia coli K-12Mutation(s): 0 
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Entity ID: 44
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S16RA [auth t]82Escherichia coli K-12Mutation(s): 0 
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Entity ID: 45
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S17SA [auth u]84Escherichia coli K-12Mutation(s): 0 
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Entity ID: 46
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S18TA [auth v]75Escherichia coli K-12Mutation(s): 0 
UniProt
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UniProt GroupP0A7T7
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Entity ID: 47
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S19UA [auth w]92Escherichia coli K-12Mutation(s): 0 
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Entity ID: 48
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S20VA [auth x]87Escherichia coli K-12Mutation(s): 0 
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Entity ID: 49
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S21WA [auth y]71Escherichia coli K-12Mutation(s): 0 
UniProt
Find proteins for P68679 (Escherichia coli (strain K12))
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Entity ID: 50
MoleculeChains LengthOrganismImage
23S rRNA RRLG-RRNAXA [auth 0]2,904Escherichia coli K-12
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Entity ID: 51
MoleculeChains LengthOrganismImage
5S rRNAYA [auth 1]120Escherichia coli K-12
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Entity ID: 52
MoleculeChains LengthOrganismImage
16S rRNA RRSB-RRNAZA [auth 2]1,542Escherichia coli K-12
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Entity ID: 53
MoleculeChains LengthOrganismImage
mRNAAB [auth 3]30synthetic construct
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Entity ID: 54
MoleculeChains LengthOrganismImage
Deacylated P-site tRNA(fMet)BB [auth 4]77Escherichia coli K-12
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Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FME (Subject of Investigation/LOI)
Query on FME
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CB [auth 4]N-FORMYLMETHIONINE
C6 H11 N O3 S
PYUSHNKNPOHWEZ-YFKPBYRVSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.37 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIXOnline
MODEL REFINEMENTPHENIX1.19.2-4158
RECONSTRUCTIONcryoSPARC3.3.0

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research Council (ERC)European Union101001394

Revision History  (Full details and data files)

  • Version 1.0: 2023-08-16
    Type: Initial release