5BW8

2.8 A crystal structure of a Get3-Get4-Get5 intermediate complex from S.cerevisiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Mechanism of Assembly of a Substrate Transfer Complex during Tail-anchored Protein Targeting.

Gristick, H.B.Rome, M.E.Chartron, J.W.Rao, M.Hess, S.Shan, S.O.Clemons, W.M.

(2015) J.Biol.Chem. 290: 30006-30017

  • DOI: 10.1074/jbc.M115.677328
  • Primary Citation of Related Structures:  5BWK

  • PubMed Abstract: 
  • Tail-anchored (TA) proteins, defined as having a single transmembrane helix at their C terminus, are post-translationally targeted to the endoplasmic reticulum membrane by the guided entry of TA proteins (GET) pathway. In yeast, the handover of TA su ...

    Tail-anchored (TA) proteins, defined as having a single transmembrane helix at their C terminus, are post-translationally targeted to the endoplasmic reticulum membrane by the guided entry of TA proteins (GET) pathway. In yeast, the handover of TA substrates is mediated by the heterotetrameric Get4/Get5 complex (Get4/5), which tethers the co-chaperone Sgt2 to the targeting factor, the Get3 ATPase. Binding of Get4/5 to Get3 is critical for efficient TA targeting; however, questions remain about the formation of the Get3·Get4/5 complex. Here we report crystal structures of a Get3·Get4/5 complex from Saccharomyces cerevisiae at 2.8 and 6.0 Å that reveal a novel interface between Get3 and Get4 dominated by electrostatic interactions. Kinetic and mutational analyses strongly suggest that these structures represent an on-pathway intermediate that rapidly assembles and then rearranges to the final Get3·Get4/5 complex. Furthermore, we provide evidence that the Get3·Get4/5 complex is dominated by a single Get4/5 heterotetramer bound to one monomer of a Get3 dimer, uncovering an intriguing asymmetry in the Get4/5 heterotetramer upon Get3 binding. Ultrafast diffusion-limited electrostatically driven Get3·Get4/5 association enables Get4/5 to rapidly sample and capture Get3 at different stages of the GET pathway.


    Organizational Affiliation

    From the Division of Chemistry and Chemical Engineering and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATPase GET3
A, B
373Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: GET3 (ARR4)
EC: 3.6.-.-
Find proteins for Q12154 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12154
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Golgi to ER traffic protein 4
C
305Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: GET4
Find proteins for Q12125 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: GET4
Go to UniProtKB:  Q12125
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin-like protein MDY2
D
54Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: MDY2 (GET5, TMA24)
Find proteins for Q12285 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12285
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Unknown Protein
Z
13N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
Z
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.224 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 111.960α = 90.00
b = 238.050β = 90.00
c = 52.190γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
Cootmodel building
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-10-14
    Type: Initial release
  • Version 1.1: 2015-10-21
    Type: Database references
  • Version 1.2: 2015-12-30
    Type: Database references
  • Version 1.3: 2017-11-22
    Type: Database references, Derived calculations, Refinement description