3ZS9

S. cerevisiae Get3-ADP-AlF4- complex with a cytosolic Get2 fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

The Mechanism of Membrane-Associated Steps in Tail-Anchored Protein Insertion.

Mariappan, M.Mateja, A.Dobosz, M.Bove, E.Hegde, R.S.Keenan, R.J.

(2011) Nature 477: 61

  • DOI: 10.1038/nature10362
  • Primary Citation of Related Structures:  
    3ZS8, 3ZS9

  • PubMed Abstract: 
  • Tail-anchored (TA) membrane proteins destined for the endoplasmic reticulum are chaperoned by cytosolic targeting factors that deliver them to a membrane receptor for insertion. Although a basic framework for TA protein recognition is now emerging, the decisive targeting and membrane insertion steps are not understood ...

    Tail-anchored (TA) membrane proteins destined for the endoplasmic reticulum are chaperoned by cytosolic targeting factors that deliver them to a membrane receptor for insertion. Although a basic framework for TA protein recognition is now emerging, the decisive targeting and membrane insertion steps are not understood. Here we reconstitute the TA protein insertion cycle with purified components, present crystal structures of key complexes between these components and perform mutational analyses based on the structures. We show that a committed targeting complex, formed by a TA protein bound to the chaperone ATPase Get3, is initially recruited to the membrane through an interaction with Get2. Once the targeting complex has been recruited, Get1 interacts with Get3 to drive TA protein release in an ATPase-dependent reaction. After releasing its TA protein cargo, the now-vacant Get3 recycles back to the cytosol concomitant with ATP binding. This work provides a detailed structural and mechanistic framework for the minimal TA protein insertion cycle.


    Organizational Affiliation

    Cell Biology and Metabolism Program, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATPASE GET3A, B354Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.6.3.16 (PDB Primary Data), 3.6 (UniProt)
UniProt
Find proteins for Q12154 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12154 
Go to UniProtKB:  Q12154
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12154
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
GOLGI TO ER TRAFFIC PROTEIN 2C, D38Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for P40056 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40056 
Go to UniProtKB:  P40056
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40056
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B]
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
ALF
Query on ALF

Download Ideal Coordinates CCD File 
F [auth A],
I [auth B]
TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
K [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
G [auth A],
J [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.558α = 90
b = 77.317β = 90
c = 165.831γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-09-07
    Type: Initial release
  • Version 1.1: 2011-11-09
    Changes: Database references