6I7T

eIF2B:eIF2 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.61 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structural basis of translational control by eIF2 phosphorylation.

Adomavicius, T.Guaita, M.Zhou, Y.Jennings, M.D.Latif, Z.Roseman, A.M.Pavitt, G.D.

(2019) Nat Commun 10: 2136-2136

  • DOI: 10.1038/s41467-019-10167-3
  • Primary Citation of Related Structures:  
    6I3M, 6I7T

  • PubMed Abstract: 
  • Protein synthesis in eukaryotes is controlled by signals and stresses via a common pathway, called the integrated stress response (ISR). Phosphorylation of the translation initiation factor eIF2 alpha at a conserved serine residue mediates translational control at the ISR core ...

    Protein synthesis in eukaryotes is controlled by signals and stresses via a common pathway, called the integrated stress response (ISR). Phosphorylation of the translation initiation factor eIF2 alpha at a conserved serine residue mediates translational control at the ISR core. To provide insight into the mechanism of translational control we have determined the structures of eIF2 both in phosphorylated and unphosphorylated forms bound with its nucleotide exchange factor eIF2B by electron cryomicroscopy. The structures reveal that eIF2 undergoes large rearrangements to promote binding of eIF2α to the regulatory core of eIF2B comprised of the eIF2B alpha, beta and delta subunits. Only minor differences are observed between eIF2 and eIF2αP binding to eIF2B, suggesting that the higher affinity of eIF2αP for eIF2B drives translational control. We present a model for controlled nucleotide exchange and initiator tRNA binding to the eIF2/eIF2B complex.


    Related Citations: 
    • Fail-safe control of translation initiation by dissociation of eIF2 alpha phosphorylated ternary complexes.
      Jennings, M.D., Kershaw, C.J., Adomavicius, T., Pavitt, G.D.
      (2017) Elife 6: --

    Organizational Affiliation

    Division of Molecular and Cellular Function, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, M13 9PT, UK. graham.pavitt@manchester.ac.uk.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Translation initiation factor eIF-2B subunit alphaA,
H [auth B]
305Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GCN3AAS2TIF221YKR026C
UniProt
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UniProt GroupP14741
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Translation initiation factor eIF-2B subunit deltaB [auth C],
C [auth D]
651Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GCD2TIF224YGR083C
UniProt
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Translation initiation factor eIF-2B subunit betaD [auth E],
I [auth F]
381Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GCD7TIF222YLR291CL8003.17
UniProt
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Translation initiation factor eIF-2B subunit epsilonE [auth G],
J [auth H]
712Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GCD6TIF225YDR211WYD8142.12YD8142B.03
UniProt
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Translation initiation factor eIF-2B subunit gammaF [auth I],
G [auth J]
578Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GCD1TIF223TRA3YOR260W
UniProt
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 2 subunit alphaK,
N [auth L]
304Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: SUI2TIF211YJR007WJ1429
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 2 subunit betaL [auth M],
O [auth N]
285Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: SUI3TIF212YPL237W
UniProt
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 2 subunit gammaM [auth O],
P
527Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GCD11TIF213YER025W
EC: 3.6.5.3
UniProt
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.61 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/L020157/1
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/N014049/1
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/M006565/1
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/M011208/1

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-22
    Type: Initial release
  • Version 1.1: 2019-06-19
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-06
    Changes: Data collection, Refinement description