1IH5

CRYSTAL STRUCTURE OF AQUAPORIN-1


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 3.7 Å
  • Aggregation State: 2D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Visualization of a water-selective pore by electron crystallography in vitreous ice.

Ren, G.Reddy, V.S.Cheng, A.Melnyk, P.Mitra, A.K.

(2001) Proc.Natl.Acad.Sci.USA 98: 1398-1403

  • DOI: 10.1073/pnas.041489198

  • PubMed Abstract: 
  • The water-selective pathway through the aquaporin-1 membrane channel has been visualized by fitting an atomic model to a 3.7-A resolution three-dimensional density map. This map was determined by analyzing images and electron diffraction patterns of ...

    The water-selective pathway through the aquaporin-1 membrane channel has been visualized by fitting an atomic model to a 3.7-A resolution three-dimensional density map. This map was determined by analyzing images and electron diffraction patterns of lipid-reconstituted two-dimensional crystals of aquaporin-1 preserved in vitrified buffer in the absence of any additive. The aqueous pathway is characterized by a size-selective pore that is approximately 4.0 +/- 0.5A in diameter, spans a length of approximately 18A, and bends by approximately 25 degrees as it traverses the bilayer. This narrow pore is connected by wide, funnel-shaped openings at the extracellular and cytoplasmic faces. The size-selective pore is outlined mostly by hydrophobic residues, resulting in a relatively inert pathway conducive to diffusion-limited water flow. The apex of the curved pore is close to the locations of the in-plane pseudo-2-fold symmetry axis that relates the N- and C-terminal halves and the conserved, functionally important N76 and N192 residues.


    Related Citations: 
    • Three-Dimensional Fold of the Human Aqp1 Water Channel Determined at 4 A Resolution by Electron Crystallography of Two-Dimensional Crystals Embedded in Ice
      Ren, G.,Cheng, A.,Reddy, V.,Melnyk, P.,Mitra, A.K.
      (2000) J.Mol.Biol. 301: 369
    • Polymorphism in the Packing of Aquaporin-1 Tetramers in 2-D Crystals
      Ren, G.,Cheng, A.,Melnyk, P.,Mitra, A.K.
      (2000) J.Struct.Biol. 130: 45
    • Three-Dimensional Organization of a Human Water Channel
      Cheng, A.,Van Hoek, A.N.,Yeager, M.,Verkman, A.S.,Mitra, A.K.
      (1997) Nature 387: 627


    Organizational Affiliation

    Department of Cell Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AQUAPORIN-1
A
269Homo sapiensMutation(s): 0 
Gene Names: AQP1 (CHIP28)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Aquaporins and Glyceroporins
Protein: 
AQP1 red blood cell aquaporin water channel
Find proteins for P29972 (Homo sapiens)
Go to Gene View: AQP1
Go to UniProtKB:  P29972
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 3.7 Å
  • Aggregation State: 2D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 
Software Package:
Software NamePurpose
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-04-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance