2WWB

CRYO-EM STRUCTURE OF THE MAMMALIAN SEC61 COMPLEX BOUND TO THE ACTIVELY TRANSLATING WHEAT GERM 80S RIBOSOME


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.48 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 Monomeric Yeast and Mammalian Sec61 Complexes Interacting with the Translating Ribosome.

Becker, T.Bhushan, S.Jarasch, A.Armache, J.P.Funes, S.Jossinet, F.Gumbart, J.Mielke, T.Berninghausen, O.Schulten, K.Westhof, E.Gilmore, R.Mandon, E.Beckmann, R.

(2009) Science 326: 1369

  • DOI: https://doi.org/10.1126/science.1178535
  • Primary Citation of Related Structures:  
    2WW9, 2WWA, 2WWB

  • PubMed Abstract: 

    The trimeric Sec61/SecY complex is a protein-conducting channel (PCC) for secretory and membrane proteins. Although Sec complexes can form oligomers, it has been suggested that a single copy may serve as an active PCC. We determined subnanometer-resolution cryo-electron microscopy structures of eukaryotic ribosome-Sec61 complexes. In combination with biochemical data, we found that in both idle and active states, the Sec complex is not oligomeric and interacts mainly via two cytoplasmic loops with the universal ribosomal adaptor site. In the active state, the ribosomal tunnel and a central pore of the monomeric PCC were occupied by the nascent chain, contacting loop 6 of the Sec complex. This provides a structural basis for the activity of a solitary Sec complex in cotranslational protein translocation.


  • Organizational Affiliation

    Gene Center Munich and Center for Integrated Protein Science, Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Feodor-Lynen-Strasse 25, 81377 Munich, Germany.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN TRANSPORT PROTEIN SEC61 SUBUNIT ALPHA ISOFORM 1476Canis lupus familiarisMutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN TRANSPORT PROTEIN SEC61 SUBUNIT GAMMA68Canis lupus familiarisMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P60058 (Canis lupus familiaris)
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN TRANSPORT PROTEIN SEC61 SUBUNIT BETA96Canis lupus familiarisMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L4-B362Triticum aestivumMutation(s): 0 
UniProt
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L17-A184Triticum aestivumMutation(s): 0 
UniProt
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L19189Triticum aestivumMutation(s): 0 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L25142Triticum aestivumMutation(s): 0 
UniProt
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L26-A127Triticum aestivumMutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L31-A113Triticum aestivumMutation(s): 0 
UniProt
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L35120Triticum aestivumMutation(s): 0 
UniProt
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L3951Triticum aestivumMutation(s): 0 
UniProt
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Entity ID: 4
MoleculeChains LengthOrganismImage
5.8S RRNA63Triticum aestivum
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Entity ID: 5
MoleculeChains LengthOrganismImage
25S RRNA34Triticum aestivum
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Entity ID: 6
MoleculeChains LengthOrganismImage
25S RRNA25Triticum aestivum
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Entity ID: 7
MoleculeChains LengthOrganismImage
25S RRNA14Triticum aestivum
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.48 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONSPIDER

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-08
    Type: Initial release
  • Version 1.1: 2011-07-20
    Changes: Database references, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary
  • Version 1.2: 2017-04-19
    Changes: Other
  • Version 2.0: 2018-10-03
    Changes: Atomic model, Data collection, Derived calculations