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 

wwPDB Validation   3D Report Full Report


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: 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 ...

    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 beckmann@lmb.uni-muenchen.de.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L17C [auth D]184Homo sapiensMutation(s): 0 
Gene Names: RPL17
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PHAROS:  P18621
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Entity ID: 4
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60S RIBOSOMAL PROTEIN L12D [auth G]165Homo sapiensMutation(s): 0 
Gene Names: RPL12
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L4E [auth H]427Homo sapiensMutation(s): 0 
Gene Names: RPL4RPL1
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Find proteins for P36578 (Homo sapiens)
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
EUKARYOTIC RELEASE FACTOR ERF1G [auth Q]431Homo sapiensMutation(s): 0 
Gene Names: ETF1ERF1RF1SUP45L1
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PHAROS:  P62495
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
NASCENT CHAINI [auth Z]22Homo sapiensMutation(s): 0 
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Entity ID: 1
MoleculeChainsLengthOrganismImage
28S RIBOSOMAL RNAA5025Homo sapiens
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Entity ID: 2
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HUMAN 18S RIBOSOMAL RNAB1869Homo sapiens
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  • Entity ID: 6
    MoleculeChainsLengthOrganismImage
    P-SITE TRNAF [auth P]18Homo sapiens
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    • Entity ID: 8
      MoleculeChainsLengthOrganismImage
      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 

      Structure Validation

      View Full Validation Report




      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