7SPZ

Nucleotide-free Get3 in two open forms


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.348 
  • R-Value Work: 0.293 
  • R-Value Observed: 0.296 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structurally derived universal mechanism for the catalytic cycle of the tail-anchored targeting factor Get3.

Fry, M.Y.Najdrova, V.Maggiolo, A.O.Saladi, S.M.Dolezal, P.Clemons Jr., W.M.

(2022) Nat Struct Mol Biol 29: 820-830

  • DOI: https://doi.org/10.1038/s41594-022-00798-4
  • Primary Citation of Related Structures:  
    7SPY, 7SPZ, 7SQ0

  • PubMed Abstract: 

    Tail-anchored (TA) membrane proteins, accounting for roughly 2% of proteomes, are primarily targeted posttranslationally to the endoplasmic reticulum membrane by the guided entry of TA proteins (GET) pathway. For this complicated process, it remains unknown how the central targeting factor Get3 uses nucleotide to facilitate large conformational changes to recognize then bind clients while also preventing exposure of hydrophobic surfaces. Here, we identify the GET pathway in Giardia intestinalis and present the structure of the Get3-client complex in the critical postnucleotide-hydrolysis state, demonstrating that Get3 reorganizes the client-binding domain (CBD) to accommodate and shield the client transmembrane helix. Four additional structures of GiGet3, spanning the nucleotide-free (apo) open to closed transition and the ATP-bound state, reveal the details of nucleotide stabilization and occluded CBD. This work resolves key conundrums and allows for a complete model of the dramatic conformational landscape of Get3.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATPase ASNA1 homolog
A, B
350Giardia lamblia ATCC 50803Mutation(s): 0 
Gene Names: GL50803_7953
EC: 3.6
UniProt
Find proteins for A8B3G9 (Giardia intestinalis (strain ATCC 50803 / WB clone C6))
Explore A8B3G9 
Go to UniProtKB:  A8B3G9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA8B3G9
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.348 
  • R-Value Work: 0.293 
  • R-Value Observed: 0.296 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.138α = 90
b = 102.605β = 90
c = 138.801γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-3000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM097572

Revision History  (Full details and data files)

  • Version 1.0: 2022-07-20
    Type: Initial release
  • Version 1.1: 2022-08-10
    Changes: Database references
  • Version 1.2: 2022-08-24
    Changes: Database references
  • Version 1.3: 2023-10-18
    Changes: Data collection, Refinement description