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 
  • R-Value Observed: 0.103 

wwPDB Validation   3D Report Full Report


This is version 2.0 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
  • Primary Citation of Related Structures:  
    3ZOJ

  • 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 arginine selectivity filter (SF) ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AQUAPORINA279Komagataella pastorisMutation(s): 0 
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Aquaporins and Glyceroporins
Protein: 
Aqy1 yeast aquaporin (pH 8.0)
Find proteins for F2QVG4 (Komagataella phaffii (strain ATCC 76273 / CBS 7435 / CECT 11047 / NRRL Y-11430 / Wegner 21-1))
Explore F2QVG4 
Go to UniProtKB:  F2QVG4
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.88 Å
  • R-Value Free: 0.107 
  • R-Value Work: 0.103 
  • R-Value Observed: 0.103 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.763α = 90
b = 90.763β = 90
c = 80.311γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-06-26
    Type: Initial release
  • Version 1.1: 2013-07-03
    Changes: Derived calculations
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary