3UG6

Crystal Structure of Get3 from Methanocaldococcus jannaschii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Tail-anchor targeting by a Get3 tetramer: the structure of an archaeal homologue.

Suloway, C.J.Rome, M.E.Clemons, W.M.

(2012) EMBO J 31: 707-719

  • DOI: 10.1038/emboj.2011.433
  • Primary Citation of Related Structures:  
    3UG6, 3UG7

  • PubMed Abstract: 
  • Efficient delivery of membrane proteins is a critical cellular process. The recently elucidated GET (Guided Entry of TA proteins) pathway is responsible for the targeted delivery of tail-anchored (TA) membrane proteins to the endoplasmic reticulum. The c ...

    Efficient delivery of membrane proteins is a critical cellular process. The recently elucidated GET (Guided Entry of TA proteins) pathway is responsible for the targeted delivery of tail-anchored (TA) membrane proteins to the endoplasmic reticulum. The central player is the ATPase Get3, which in its free form exists as a dimer. Biochemical evidence suggests a role for a tetramer of Get3. Here, we present the first crystal structure of an archaeal Get3 homologue that exists as a tetramer and is capable of TA protein binding. The tetramer generates a hydrophobic chamber that we propose binds the TA protein. We use small-angle X-ray scattering to provide the first structural information of a fungal Get3/TA protein complex showing that the overall molecular envelope is consistent with the archaeal tetramer structure. Moreover, we show that this fungal tetramer complex is capable of TA insertion. This allows us to suggest a model where a tetramer of Get3 sequesters a TA protein during targeting to the membrane.


    Organizational Affiliation

    Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
arsenical pump-driving ATPase ABCD349Methanocaldococcus jannaschii DSM 2661Mutation(s): 0 
Gene Names: MJ1142
EC: 3.6.3.16 (PDB Primary Data), 7.3.2.7 (UniProt)
Find proteins for Q58542 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Explore Q58542 
Go to UniProtKB:  Q58542
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.736α = 90
b = 76.874β = 108.828
c = 127.81γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Blu-Icedata collection
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-07
    Type: Initial release
  • Version 1.1: 2012-01-11
    Changes: Database references
  • Version 1.2: 2012-02-15
    Changes: Database references