7RUC

Metazoan pre-targeting GET complex with SGTA (cBUGGS)

  • Classification: CHAPERONE
  • Organism(s): Danio rerio, Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): Yes 

  • Deposited: 2021-08-16 Released: 2021-12-15 
  • Deposition Author(s): Keszei, A.F.A., Yip, M.C.J., Shao, S.
  • Funding Organization(s): Other private, David and Lucile Packard Foundation, National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), American Heart Association

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 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

Structural insights into metazoan pretargeting GET complexes.

Keszei, A.F.A.Yip, M.C.J.Hsieh, T.C.Shao, S.

(2021) Nat Struct Mol Biol 28: 1029-1037

  • DOI: https://doi.org/10.1038/s41594-021-00690-7
  • Primary Citation of Related Structures:  
    7RU9, 7RUA, 7RUC

  • PubMed Abstract: 

    Close coordination between chaperones is essential for protein biosynthesis, including the delivery of tail-anchored (TA) proteins containing a single C-terminal transmembrane domain to the endoplasmic reticulum (ER) by the conserved GET pathway. For successful targeting, nascent TA proteins must be promptly chaperoned and loaded onto the cytosolic ATPase Get3 through a transfer reaction involving the chaperone SGTA and bridging factors Get4, Ubl4a and Bag6. Here, we report cryo-electron microscopy structures of metazoan pretargeting GET complexes at 3.3-3.6 Å. The structures reveal that Get3 helix 8 and the Get4 C terminus form a composite lid over the Get3 substrate-binding chamber that is opened by SGTA. Another interaction with Get4 prevents formation of Get3 helix 4, which links the substrate chamber and ATPase domain. Both interactions facilitate TA protein transfer from SGTA to Get3. Our findings show how the pretargeting complex primes Get3 for coordinated client loading and ER targeting.


  • Organizational Affiliation

    Department of Cell Biology, Harvard Medical School, Blavatnik Institute, Boston, MA, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATPase GET3
A, B
343Danio rerioMutation(s): 1 
Gene Names: get3asna1si:dkey-121b10.2zgc:86799
EC: 3.6
UniProt
Find proteins for Q6IQE5 (Danio rerio)
Explore Q6IQE5 
Go to UniProtKB:  Q6IQE5
Entity Groups  
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UniProt GroupQ6IQE5
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Golgi to ER traffic protein 4 homologC,
E [auth F]
333Homo sapiensMutation(s): 0 
Gene Names: GET4C7orf20CEETRC35CGI-20
UniProt & NIH Common Fund Data Resources
Find proteins for Q7L5D6 (Homo sapiens)
Explore Q7L5D6 
Go to UniProtKB:  Q7L5D6
PHAROS:  Q7L5D6
GTEx:  ENSG00000239857 
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UniProt GroupQ7L5D6
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Large proline-rich protein BAG6D,
F [auth G]
132Homo sapiensMutation(s): 0 
Gene Names: BAG6BAT3G3
UniProt & NIH Common Fund Data Resources
Find proteins for P46379 (Homo sapiens)
Explore P46379 
Go to UniProtKB:  P46379
PHAROS:  P46379
GTEx:  ENSG00000204463 
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UniProt GroupP46379
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Ubiquitin-like protein 4AG [auth H]165Homo sapiensMutation(s): 0 
Gene Names: UBL4ADXS254EGDXUBL4
UniProt & NIH Common Fund Data Resources
Find proteins for P11441 (Homo sapiens)
Explore P11441 
Go to UniProtKB:  P11441
PHAROS:  P11441
GTEx:  ENSG00000102178 
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UniProt GroupP11441
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other privateUnited StatesSmith Family Foundation
Other privateUnited StatesVallee Scholars Program
David and Lucile Packard FoundationUnited States2019-69660
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesDP2GM137415
American Heart AssociationUnited States287375208

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-15
    Type: Initial release
  • Version 1.1: 2021-12-22
    Changes: Database references
  • Version 1.2: 2024-06-05
    Changes: Data collection