3ZOJ

High-resolution structure of Pichia Pastoris aquaporin Aqy1 at 0.88 A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.88 Å
  • R-Value Free: 0.107 
  • R-Value Work: 0.103 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Subangstrom Resolution X-Ray Structure Details Aquaporin-Water Interactions

Kosinska-Eriksson, U.Fischer, G.Friemann, R.Enkavi, G.Tajkhorshid, E.Neutze, R.

(2013) Science 340: 1346

  • DOI: 10.1126/science.1234306

  • PubMed Abstract: 
  • Aquaporins are membrane channels that facilitate the flow of water across biological membranes. Two conserved regions are central for selective function: the dual asparagine-proline-alanine (NPA) aquaporin signature motif and the aromatic and arginin ...

    Aquaporins are membrane channels that facilitate the flow of water across biological membranes. Two conserved regions are central for selective function: the dual asparagine-proline-alanine (NPA) aquaporin signature motif and the aromatic and arginine selectivity filter (SF). Here, we present the crystal structure of a yeast aquaporin at 0.88 angstrom resolution. We visualize the H-bond donor interactions of the NPA motif's asparagine residues to passing water molecules; observe a polarized water-water H-bond configuration within the channel; assign the tautomeric states of the SF histidine and arginine residues; and observe four SF water positions too closely spaced to be simultaneously occupied. Strongly correlated movements break the connectivity of SF waters to other water molecules within the channel and prevent proton transport via a Grotthuss mechanism.


    Related Citations: 
    • Crystal Structure of a Yeast Aquaporin at 1.15 Angstrom Reveals a Novel Gating Mechanism.
      Fischer, G.,Kosinska-Eriksson, U.,Aponte-Santamaria, C.,Palmgren, M.,Geijer, C.,Hedfalk, K.,Hohmann, S.,De Groot, B.L.,Neutze, R.,Lindkvist-Petersson, K.
      (2009) Plos Biol. 7: 130


    Organizational Affiliation

    Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, S-40530 Göteborg, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AQUAPORIN
A
279Komagataella phaffii (strain ATCC 76273 / CBS 7435 / CECT 11047 / NRRL Y-11430 / Wegner 21-1)Mutation(s): 0 
Gene Names: AQY1
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Aquaporins and Glyceroporins
Protein: 
Aqy1 yeast aquaporin (pH 3.5)
Find proteins for F2QVG4 (Komagataella phaffii (strain ATCC 76273 / CBS 7435 / CECT 11047 / NRRL Y-11430 / Wegner 21-1))
Go to UniProtKB:  F2QVG4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
BOG
Query on BOG

Download SDF File 
Download CCD File 
A
B-OCTYLGLUCOSIDE
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.88 Å
  • R-Value Free: 0.107 
  • R-Value Work: 0.103 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 90.763α = 90.00
b = 90.763β = 90.00
c = 80.311γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-26
    Type: Initial release
  • Version 1.1: 2013-07-03
    Type: Derived calculations