2B6O

Electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) at 1.9A resolution, in a closed pore state


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 1.90 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.258 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


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.


    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 proteinA263Ovis ariesMutation(s): 0 
Gene Names: MIPAQP0
Membrane Entity: Yes 
UniProt
Find proteins for Q6J8I9 (Ovis aries)
Explore Q6J8I9 
Go to UniProtKB:  Q6J8I9
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MC3 (Subject of Investigation/LOI)
Query on MC3

Download Ideal Coordinates CCD File 
B [auth A] , C [auth A] , D [auth A] , E [auth A] , F [auth A] , G [auth A] , H [auth A] , I [auth A] , 
B [auth A], C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A]
1,2-DIMYRISTOYL-RAC-GLYCERO-3-PHOSPHOCHOLINE
C36 H72 N O8 P
CITHEXJVPOWHKC-UUWRZZSWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 1.90 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.258 
  • Space Group: P 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.5α = 90
b = 65.5β = 90
c = 160γ = 90
Software Package:
Software NamePurpose
GATANdata collection
GATANdata reduction
CNSrefinement
GATANdata scaling
CNSphasing

Structure Validation

View Full Validation Report




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: Derived calculations, Version format compliance
  • Version 1.3: 2018-07-18
    Changes: Author supporting evidence, Data collection
  • Version 1.4: 2020-01-22
    Changes: Advisory, Derived calculations
  • Version 1.5: 2020-06-17
    Changes: Advisory, Database references