2B6P

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 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


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, 2B6P

  • 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-dimensional crystals ...

    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 U S A 101: 14045

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Lens fiber major intrinsic proteinA263Bos taurusMutation(s): 0 
Gene Names: MIP
Membrane Entity: Yes 
UniProt
Find proteins for P06624 (Bos taurus)
Explore P06624 
Go to UniProtKB:  P06624
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06624
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 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
b = 109.531β = 90
c = 52.822γ = 90
Software Package:
Software NamePurpose
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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