1FQY

STRUCTURE OF AQUAPORIN-1 AT 3.8 A RESOLUTION BY ELECTRON CRYSTALLOGRAPHY


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 3.80 Å
  • R-Value Free: 0.417 
  • R-Value Work: 0.399 
  • R-Value Observed: 0.406 

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This is version 1.3 of the entry. See complete history


Literature

Structural determinants of water permeation through aquaporin-1.

Murata, K.Mitsuoka, K.Hirai, T.Walz, T.Agre, P.Heymann, J.B.Engel, A.Fujiyoshi, Y.

(2000) Nature 407: 599-605

  • DOI: 10.1038/35036519
  • Primary Citation of Related Structures:  
    1FQY

  • PubMed Abstract: 
  • Human red cell AQP1 is the first functionally defined member of the aquaporin family of membrane water channels. Here we describe an atomic model of AQP1 at 3.8A resolution from electron crystallographic data. Multiple highly conserved amino-acid residues stabilize the novel fold of AQP1 ...

    Human red cell AQP1 is the first functionally defined member of the aquaporin family of membrane water channels. Here we describe an atomic model of AQP1 at 3.8A resolution from electron crystallographic data. Multiple highly conserved amino-acid residues stabilize the novel fold of AQP1. The aqueous pathway is lined with conserved hydrophobic residues that permit rapid water transport, whereas the water selectivity is due to a constriction of the pore diameter to about 3 A over a span of one residue. The atomic model provides a possible molecular explanation to a longstanding puzzle in physiology-how membranes can be freely permeable to water but impermeable to protons.


    Organizational Affiliation

    National Institute for Physiological Sciences, Okazaki, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AQUAPORIN-1A269Homo sapiensMutation(s): 0 
Gene Names: AQP1CHIP28
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P29972 (Homo sapiens)
Explore P29972 
Go to UniProtKB:  P29972
PHAROS:  P29972
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 3.80 Å
  • R-Value Free: 0.417 
  • R-Value Work: 0.399 
  • R-Value Observed: 0.406 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96α = 90
b = 96β = 90
c = 100γ = 90
Software Package:
Software NamePurpose
LATLINEmodel building
X-PLORrefinement
CCP4data scaling
LATLINEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-10-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description