2WW9

Cryo-EM structure of the active yeast Ssh1 complex bound to the yeast 80S ribosome

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.60 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: 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 ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
SEC SIXTY-ONE PROTEIN HOMOLOGA490Saccharomyces cerevisiaeMutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN TRANSPORT PROTEIN SSS1B80Saccharomyces cerevisiaeMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P35179 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN TRANSPORT PROTEIN SEB2C87Saccharomyces cerevisiaeMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L4-BH362Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
60S RIBOSOMAL PROTEIN L17-AI184Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 10
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60S RIBOSOMAL PROTEIN L19J189Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 11
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60S RIBOSOMAL PROTEIN L25K142Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 12
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60S RIBOSOMAL PROTEIN L26-AL127Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 13
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60S RIBOSOMAL PROTEIN L31-AM113Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 14
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60S RIBOSOMAL PROTEIN L35N120Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 15
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60S RIBOSOMAL PROTEIN L39O51Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 4
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25S RRNAD63Saccharomyces cerevisiae
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Entity ID: 5
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25S RRNAE34Saccharomyces cerevisiae
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Entity ID: 6
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25S RRNAF25Saccharomyces cerevisiae
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Entity ID: 7
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25S RRNAG18Saccharomyces cerevisiae
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONSPIDER

Structure Validation

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View more in-depth experimental data
Entry History 

Deposition Data

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, Structure summary
  • Version 1.2: 2015-10-28
    Changes: Other
  • Version 1.3: 2017-04-19
    Changes: Other
  • Version 2.0: 2018-10-03
    Changes: Atomic model, Data collection, Derived calculations