6QZJ

Crystal structure of human Aquaporin 7 at 2.2 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for Glycerol Efflux and Selectivity of Human Aquaporin 7.

de Mare, S.W.Venskutonyte, R.Eltschkner, S.de Groot, B.L.Lindkvist-Petersson, K.

(2020) Structure 28: 215-222.e3

  • DOI: 10.1016/j.str.2019.11.011
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The aquaglyceroporin 7 (AQP7) facilitates permeation of glycerol through cell membranes and is crucial for lipid metabolism in humans. Glycerol efflux in human adipocytes is controlled by translocation of AQP7 to the plasma membrane upon hormone stim ...

    The aquaglyceroporin 7 (AQP7) facilitates permeation of glycerol through cell membranes and is crucial for lipid metabolism in humans. Glycerol efflux in human adipocytes is controlled by translocation of AQP7 to the plasma membrane upon hormone stimulation. Here we present two X-ray structures of human AQP7 at 1.9 and 2.2 Å resolution. The structures combined with molecular dynamics simulations suggest that AQP7 is a channel selective for glycerol and that glycerol may hamper water permeation through the channel. Moreover, the high resolution of the structures facilitated a detailed analysis of the orientation of glycerol in the pore, disclosing unusual positions of the hydroxyl groups. The data suggest that glycerol is conducted by a partly rotating movement through the channel. These observations provide a framework for understanding the basis of glycerol efflux and selectivity in aquaglyceroporins and pave the way for future design of AQP7 inhibitors.


    Organizational Affiliation

    Experimental Medical Science, Medical Structural Biology, BMC C13, Lund University, SE-221 84 Lund, Sweden.,Department of Theoretical and Computational Biophysics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Experimental Medical Science, Medical Structural Biology, BMC C13, Lund University, SE-221 84 Lund, Sweden. Electronic address: karin.lindkvist@med.lu.se.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aquaporin-7
A
247Homo sapiensMutation(s): 0 
Gene Names: AQP7 (AQP7L, AQP9)
Find proteins for O14520 (Homo sapiens)
Go to Gene View: AQP7
Go to UniProtKB:  O14520
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.209 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 86.761α = 90.00
b = 86.761β = 90.00
c = 83.544γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PDB_EXTRACTdata extraction
PHASERphasing
PHENIXrefinement
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden--

Revision History 

  • Version 1.0: 2019-11-27
    Type: Initial release
  • Version 1.1: 2019-12-25
    Type: Database references
  • Version 1.2: 2020-02-12
    Type: Database references