4IDP

human atlastin-1 1-446, N440T, GppNHp


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 

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, 4IDO, 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 mechanistic details, including the catalytic mechanism and GTP hydrolysis-driven conformational changes, are yet to be determined ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Atlastin-1 ABCD447Homo sapiensMutation(s): 1 
Gene Names: ATL1GBP3SPG3A
EC: 3.6.5
Find proteins for Q8WXF7 (Homo sapiens)
Explore Q8WXF7 
Go to UniProtKB:  Q8WXF7
NIH Common Fund Data Resources
PHAROS:  Q8WXF7
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,B,C,DL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 131.946α = 90
b = 268.121β = 90
c = 62.427γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXmodel building
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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