5A8L

Human eRF1 and the hCMV nascent peptide in the translation termination complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 2.0 of the entry. See complete history


Literature

Structure of a Human Translation Termination Complex.

Matheisl, S.Berninghausen, O.Becker, T.Beckmann, R.

(2015) Nucleic Acids Res 43: 8615

  • DOI: https://doi.org/10.1093/nar/gkv909
  • Primary Citation of Related Structures:  
    5A8L

  • PubMed Abstract: 

    In contrast to bacteria that have two release factors, RF1 and RF2, eukaryotes only possess one unrelated release factor eRF1, which recognizes all three stop codons of the mRNA and hydrolyses the peptidyl-tRNA bond. While the molecular basis for bacterial termination has been elucidated, high-resolution structures of eukaryotic termination complexes have been lacking. Here we present a 3.8 Å structure of a human translation termination complex with eRF1 decoding a UAA(A) stop codon. The complex was formed using the human cytomegalovirus (hCMV) stalling peptide, which perturbs the peptidyltransferase center (PTC) to silence the hydrolysis activity of eRF1. Moreover, unlike sense codons or bacterial stop codons, the UAA stop codon adopts a U-turn-like conformation within a pocket formed by eRF1 and the ribosome. Inducing the U-turn conformation for stop codon recognition rationalizes how decoding by eRF1 includes monitoring geometry in order to discriminate against sense codons.


  • Organizational Affiliation

    Gene Center and Center for integrated Protein Science Munich, Department of Biochemistry, Feodor-Lynen-Str. 25, University of Munich, 81377 Munich, Germany.


Macromolecules

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L17C [auth D]184Homo sapiensMutation(s): 0 
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PHAROS:  P18621
GTEx:  ENSG00000265681 
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UniProt GroupP18621
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L12D [auth G]165Homo sapiensMutation(s): 0 
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PHAROS:  P30050
GTEx:  ENSG00000197958 
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UniProt GroupP30050
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L4E [auth H]427Homo sapiensMutation(s): 0 
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Find proteins for P36578 (Homo sapiens)
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PHAROS:  P36578
GTEx:  ENSG00000174444 
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UniProt GroupP36578
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
EUKARYOTIC RELEASE FACTOR ERF1G [auth Q]431Homo sapiensMutation(s): 0 
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Find proteins for P62495 (Homo sapiens)
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PHAROS:  P62495
GTEx:  ENSG00000120705 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
NASCENT CHAINI [auth Z]22Homo sapiensMutation(s): 0 
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Entity ID: 1
MoleculeChains LengthOrganismImage
28S RIBOSOMAL RNA5,025Homo sapiens
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Entity ID: 2
MoleculeChains LengthOrganismImage
HUMAN 18S RIBOSOMAL RNA1,869Homo sapiens
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Entity ID: 6
MoleculeChains LengthOrganismImage
P-SITE TRNAF [auth P]18Homo sapiens
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Entity ID: 8
MoleculeChains LengthOrganismImage
MRNAH [auth R]9Homo sapiens
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONSPIDER

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-12-02
    Type: Initial release
  • Version 2.0: 2017-08-23
    Changes: Atomic model, Data collection, Derived calculations