4IDO

human atlastin-1 1-446, C-his6, GDPAlF4-


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.091 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for conformational switching and GTP loading of the large G protein atlastin.

Byrnes, L.J.Singh, A.Szeto, K.Benvin, N.M.O'Donnell, J.P.Zipfel, W.R.Sondermann, H.

(2013) Embo J. 32: 369-384

  • DOI: 10.1038/emboj.2012.353
  • Primary Citation of Related Structures:  4IDN, 4IDP, 4IDQ

  • PubMed Abstract: 
  • Atlastin, a member of the dynamin superfamily, is known to catalyse homotypic membrane fusion in the smooth endoplasmic reticulum (ER). Recent studies of atlastin have elucidated key features about its structure and function; however, several mechani ...

    Atlastin, a member of the dynamin superfamily, is known to catalyse homotypic membrane fusion in the smooth endoplasmic reticulum (ER). Recent studies of atlastin have elucidated key features about its structure and function; however, several mechanistic details, including the catalytic mechanism and GTP hydrolysis-driven conformational changes, are yet to be determined. Here, we present the crystal structures of atlastin-1 bound to GDP·AlF(4)(-) and GppNHp, uncovering an intramolecular arginine finger that stimulates GTP hydrolysis when correctly oriented through rearrangements within the G domain. Utilizing Förster Resonance Energy Transfer, we describe nucleotide binding and hydrolysis-driven conformational changes in atlastin and their sequence. Furthermore, we discovered a nucleotide exchange mechanism that is intrinsic to atlastin's N-terminal domains. Our results indicate that the cytoplasmic domain of atlastin acts as a tether and homotypic interactions are timed by GTP binding and hydrolysis. Perturbation of these mechanisms may be implicated in a group of atlastin-associated hereditary neurodegenerative diseases.


    Organizational Affiliation

    Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Atlastin-1
A, B
457Homo sapiensGene Names: ATL1 (GBP3, SPG3A)
EC: 3.6.5.-
Find proteins for Q8WXF7 (Homo sapiens)
Go to Gene View: ATL1
Go to UniProtKB:  Q8WXF7
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
A, B
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
ALF
Query on ALF

Download SDF File 
Download CCD File 
A, B
TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
GDPKd: 11630 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.091 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.610α = 90.00
b = 116.430β = 90.00
c = 185.400γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
HKL-2000data scaling
PHENIXmodel building
HKL-2000data reduction
PHASERphasing
PHENIXrefinement
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-09
    Type: Initial release
  • Version 1.1: 2013-02-06
    Type: Database references
  • Version 1.2: 2013-02-20
    Type: Database references