1AEI

CRYSTAL STRUCTURE OF THE ANNEXIN XII HEXAMER


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the annexin XII hexamer and implications for bilayer insertion.

Luecke, H.Chang, B.T.Mailliard, W.S.Schlaepfer, D.D.Haigler, H.T.

(1995) Nature 378: 512-515

  • DOI: 10.1038/378512a0

  • PubMed Abstract: 
  • Annexins are a family of calcium- and phospholipid-binding proteins implicated in a number of biological processes including membrane fusion and ion channel formation. The crystal structure of the annexin XII hexamer, refined at 2.8 A resolution, for ...

    Annexins are a family of calcium- and phospholipid-binding proteins implicated in a number of biological processes including membrane fusion and ion channel formation. The crystal structure of the annexin XII hexamer, refined at 2.8 A resolution, forms a concave disk with 3-2 symmetry, about 100 A in diameter and 70 A thick with a central hydrophilic pore. Six intermolecular Ca2+ ions are involved in hexamer formation. An additional 18 Ca2+ ions are located on the perimeter of the disk, accessible only from the side of the hexameric disk. On the basis of the hexamer structure we propose here a new mode of protein-phospholipid bilayer interaction that is distinct from the hydrophobic insertion of typical membrane proteins. This speculative model postulates the Ca(2+)-dependent insertion of the hydrophilic annexin XII hexamer into phospholipid bilayers with local reorientation of the bilayer phospholipids.


    Organizational Affiliation

    Stanford Synchrotron Radiation Laboratory, California 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ANNEXIN XII
A, B, C, D, E, F
315Hydra vulgarisMutation(s): 0 
Gene Names: ANXB12
Find proteins for P26256 (Hydra vulgaris)
Go to UniProtKB:  P26256
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C, D, E, F
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.236 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 71.200α = 90.00
b = 179.200β = 97.60
c = 100.700γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
X-PLORmodel building
GLRFphasing
X-PLORrefinement
X-PLORphasing
CCP4data scaling
ROTAVATA)data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-08-20
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance