6SWE

IC2 head of cryo-EM structure of a full archaeal ribosomal translation initiation complex devoid of aIF1 in P. abyssi


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



Literature

Cryo-EM study of an archaeal 30S initiation complex gives insights into evolution of translation initiation.

Coureux, P.D.Lazennec-Schurdevin, C.Bourcier, S.Mechulam, Y.Schmitt, E.

(2020) Commun Biol 3: 58-58

  • DOI: 10.1038/s42003-020-0780-0
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Archaeal translation initiation occurs within a macromolecular complex containing the small ribosomal subunit (30S) bound to mRNA, initiation factors aIF1, aIF1A and the ternary complex aIF2:GDPNP:Met-tRNA i Met . Here, we dete ...

    Archaeal translation initiation occurs within a macromolecular complex containing the small ribosomal subunit (30S) bound to mRNA, initiation factors aIF1, aIF1A and the ternary complex aIF2:GDPNP:Met-tRNA i Met . Here, we determine the cryo-EM structure of a 30S:mRNA:aIF1A:aIF2:GTP:Met-tRNA i Met complex from Pyrococcus abyssi at 3.2 Å resolution. It highlights archaeal features in ribosomal proteins and rRNA modifications. We find an aS21 protein, at the location of eS21 in eukaryotic ribosomes. Moreover, we identify an N-terminal extension of archaeal eL41 contacting the P site. We characterize 34 N 4 -acetylcytidines distributed throughout 16S rRNA, likely contributing to hyperthermostability. Without aIF1, the 30S head is stabilized and initiator tRNA is tightly bound to the P site. A network of interactions involving tRNA, mRNA, rRNA modified nucleotides and C-terminal tails of uS9, uS13 and uS19 is observed. Universal features and domain-specific idiosyncrasies of translation initiation are discussed in light of ribosomal structures from representatives of each domain of life.


    Organizational Affiliation

    Laboratoire de Biologie Structurale de la Cellule, BIOC, Ecole polytechnique, CNRS, Institut Polytechnique de Paris, 91128, Palaiseau, cedex, France. emmanuelle.schmitt@polytechnique.edu.



Macromolecules

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S7H215Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps7PYRAB06200PAB0428
Find proteins for Q9V109 (Pyrococcus abyssi (strain GE5 / Orsay))
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Go to UniProtKB:  Q9V109
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S9K135Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps9PYRAB05330PAB0366
Find proteins for Q9V195 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S10L102Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps10PYRAB06840PAB0466
Find proteins for Q9V0V6 (Pyrococcus abyssi (strain GE5 / Orsay))
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Go to UniProtKB:  Q9V0V6
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S13O148Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps13PYRAB05270PAB0360
Find proteins for Q9V1A0 (Pyrococcus abyssi (strain GE5 / Orsay))
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Go to UniProtKB:  Q9V1A0
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S14 type ZP56Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps14PYRAB03270PAB7080
Find proteins for P62012 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S17eS67Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps17ePYRAB08290PAB7207
Find proteins for Q9V0G0 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S19T132Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps19PYRAB03380PAB2123
Find proteins for Q9V1T9 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S19eU150Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps19ePYRAB08210PAB1813
Find proteins for Q9V0G8 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S28eX71Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps28ePYRAB06760PAB7165
Find proteins for P61029 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S27aeY51Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps27aePYRAB16885PAB3419a
Find proteins for P61238 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S3Z210Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rps3PYRAB03360PAB2125
Find proteins for Q9V1U1 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
50S ribosomal protein L7Ae3123Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: rpl7aePYRAB06750PAB0460
Find proteins for P62008 (Pyrococcus abyssi (strain GE5 / Orsay))
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetails
Translation initiation factor 1A6113Pyrococcus abyssi GE5Mutation(s): 0 
Gene Names: eIF1Aaif1APYRAB05910PAB2441
Find proteins for Q9V138 (Pyrococcus abyssi (strain GE5 / Orsay))
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Go to UniProtKB:  Q9V138
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  • Reference Sequence

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Entity ID: 1
MoleculeChainsLengthOrganism
16S ribosomal RNA2468Pyrococcus abyssi GE5
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Entity ID: 14
MoleculeChainsLengthOrganism
initiator Met-tRNA fMet from E. coli (A1U72 variant)418Escherichia coli
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
P
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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2, 4
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
French National Research AgencyFranceANR-17-CE11-0037

Revision History 

  • Version 1.0: 2020-02-19
    Type: Initial release