3M9I

Electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) in E. coli polar lipids


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Principles of membrane protein interactions with annular lipids deduced from aquaporin-0 2D crystals.

Hite, R.K.Li, Z.Walz, T.

(2010) Embo J. 29: 1652-1658

  • DOI: 10.1038/emboj.2010.68

  • PubMed Abstract: 
  • We have previously described the interactions of aquaporin-0 (AQP0) with dimyristoyl phosphatidylcholine (DMPC) lipids. We have now determined the 2.5 A structure of AQP0 in two-dimensional (2D) crystals formed with Escherichia coli polar lipids (EPL ...

    We have previously described the interactions of aquaporin-0 (AQP0) with dimyristoyl phosphatidylcholine (DMPC) lipids. We have now determined the 2.5 A structure of AQP0 in two-dimensional (2D) crystals formed with Escherichia coli polar lipids (EPLs), which differ from DMPC both in headgroups and acyl chains. Comparison of the two structures shows that AQP0 does not adapt to the different length of the acyl chains in EPLs and that the distance between the phosphodiester groups in the two leaflets of the DMPC and EPL bilayers is almost identical. The EPL headgroups interact differently with AQP0 than do those of DMPC, but the acyl chains in the EPL and DMPC bilayers occupy similar positions. The interactions of annular lipids with membrane proteins seem to be driven by the propensity of the acyl chains to fill gaps in the protein surface. Interactions of the lipid headgroups may be responsible for the specific interactions found in tightly bound lipids but seem to have a negligible effect on interactions of generic annular lipids with membrane proteins.


    Organizational Affiliation

    Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lens fiber major intrinsic protein
A
220Ovis ariesMutation(s): 0 
Gene Names: MIP (AQP0)
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 Q6J8I9 (Ovis aries)
Go to Gene View: MIP
Go to UniProtKB:  Q6J8I9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3PE
Query on 3PE

Download SDF File 
Download CCD File 
A
1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE
3-SN-PHOSPHATIDYLETHANOLAMINE
C41 H82 N O8 P
LVNGJLRDBYCPGB-LDLOPFEMSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
Software Package:
Software NamePurpose
Gatandata collection
CNSrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-08
    Type: Data collection, Data processing, Refinement description