Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 161.85 kDa 
• Atom Count: 9822 
• Residue Count: 1212 
• Unique protein chains: 1

3UG6

Crystal Structure of Get3 from Methanocaldococcus jannaschii

• DOI: 10.2210/pdb3UG6/pdb

• Classification: HYDROLASE
• Organism(s): Methanocaldococcus jannaschii DSM 2661
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2011-11-02 Released: 2011-12-07 
• Deposition Author(s): Suloway, C.J.M., Rome, M.E., Clemons Jr., W.M.

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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 

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

• PubMed: 22124326 
• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
arsenical pump-driving ATPase	A, B, C, D	349	Methanocaldococcus jannaschii DSM 2661	Mutation(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

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP	A, B, C, D	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
ZN	A, C	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG	A, B, C, D	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

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 = 85.736	α = 90
b = 76.874	β = 108.828
c = 127.81	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
Blu-Ice	data collection
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-11-02 
• Released Date: 2011-12-07 
Deposition Author(s): Suloway, C.J.M., Rome, M.E., Clemons Jr., W.M.

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