2B6P

X-ray structure of lens Aquaporin-0 (AQP0) (lens MIP) in an open pore state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Re-refinement Note

This entry reflects an alternative modeling of the original data in: 

  • 1YMG - determined by Harries, W.E.C., Akhavan, D., Miercke, L.J.W., Khademi, S., Stroud, R.M.  

Literature

Lipid-protein interactions in double-layered two-dimensional AQP0 crystals.

Gonen, T.Cheng, Y.Sliz, P.Hiroaki, Y.Fujiyoshi, Y.Harrison, S.C.Walz, T.

(2005) Nature 438: 633-638

  • DOI: 10.1038/nature04321
  • Primary Citation of Related Structures:  2B6O

  • PubMed Abstract: 
  • Lens-specific aquaporin-0 (AQP0) functions as a specific water pore and forms the thin junctions between fibre cells. Here we describe a 1.9 A resolution structure of junctional AQP0, determined by electron crystallography of double-layered two-dimen ...

    Lens-specific aquaporin-0 (AQP0) functions as a specific water pore and forms the thin junctions between fibre cells. Here we describe a 1.9 A resolution structure of junctional AQP0, determined by electron crystallography of double-layered two-dimensional crystals. Comparison of junctional and non-junctional AQP0 structures shows that junction formation depends on a conformational switch in an extracellular loop, which may result from cleavage of the cytoplasmic amino and carboxy termini. In the centre of the water pathway, the closed pore in junctional AQP0 retains only three water molecules, which are too widely spaced to form hydrogen bonds with each other. Packing interactions between AQP0 tetramers in the crystalline array are mediated by lipid molecules, which assume preferred conformations. We were therefore able to build an atomic model for the lipid bilayer surrounding the AQP0 tetramers, and we describe lipid-protein interactions.


    Related Citations: 
    • The Channel Architecture Of Aquaporin O At 2.2 Angstrom Resolution
      Harries, W.E.C.,Akhavan, D.,Miercke, L.J.W.,Khademi, S.,Stroud, R.M.
      (2004) Proc.Natl.Acad.Sci.USA 101: 14045


    Organizational Affiliation

    Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, Massachusetts 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lens fiber major intrinsic protein
A
263Bos taurusGene Names: MIP
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Aquaporins and Glyceroporins
Protein: 
AQP0 aquaporin water channel from sheep lens.
Find proteins for P06624 (Bos taurus)
Go to Gene View: MIP
Go to UniProtKB:  P06624
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.242 
  • Space Group: P 4 21 2
Unit Cell:
Length (Å)Angle (°)
a = 109.531α = 90.00
b = 109.531β = 90.00
c = 52.822γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-12-06
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-10-26
    Type: Other