3ZDM

Crystal structure of the Sgt2 N domain and the Get5 UBL domain complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the Sgt2 Dimerization Domain Complexed with the Get5 Ubl Domain Involved in the Targeting of Tail-Anchored Membrane Proteins to the Endoplasmic Reticulum.

Tung, J.-Y.Li, Y.-C.Lin, T.-W.Hsiao, C.-D.

(2013) Acta Crystallogr D Biol Crystallogr 69: 2081

  • DOI: 10.1107/S0907444913019379
  • Primary Citation of Related Structures:  
    3ZDM

  • PubMed Abstract: 
  • The insertion of tail-anchored membrane (TA) proteins into the appropriate membrane is a post-translational event that requires stabilization of the transmembrane domain and targeting to the proper destination. Sgt2, a small glutamine-rich tetratricopeptide-repeat protein, is a heat-shock protein cognate (HSC) co-chaperone that preferentially binds endoplasmic reticulum-destined TA proteins and directs them to the GET pathway via Get4 and Get5 ...

    The insertion of tail-anchored membrane (TA) proteins into the appropriate membrane is a post-translational event that requires stabilization of the transmembrane domain and targeting to the proper destination. Sgt2, a small glutamine-rich tetratricopeptide-repeat protein, is a heat-shock protein cognate (HSC) co-chaperone that preferentially binds endoplasmic reticulum-destined TA proteins and directs them to the GET pathway via Get4 and Get5. The N-terminal domain of Sgt2 seems to exert dual functions. It mediates Get5 interaction and allows substrate delivery to Get3. Following the N-terminus of Get5 is a ubiquitin-like (Ubl) domain that interacts with the N-terminus of Sgt2. Here, the crystal structure of the Sgt2 dimerization domain complexed with the Get5 Ubl domain (Sgt2N-Get5Ubl) is reported. This complex reveals an intimate interaction between one Sgt2 dimer and one Get5 monomer. This research further demonstrates that hydrophobic residues from both Sgt2 and Get5 play an important role in cell survival under heat stress. This study provides detailed molecular insights into the specific binding of this GET-pathway complex.


    Organizational Affiliation

    Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SMALL GLUTAMINE-RICH TETRATRICOPEPTIDE REPEAT- CONTAINING PROTEIN 2A, B, D, E72Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for Q12118 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12118 
Go to UniProtKB:  Q12118
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12118
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
UBIQUITIN-LIKE PROTEIN MDY2C, F81Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for Q12285 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12285 
Go to UniProtKB:  Q12285
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12285
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 137.109α = 90
b = 34.127β = 105.84
c = 92.092γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-10-02
    Type: Initial release
  • Version 1.1: 2013-10-16
    Changes: Database references