3GD8

Crystal Structure of Human Aquaporin 4 at 1.8 and its Mechanism of Conductance

• PDB DOI: https://doi.org/10.2210/pdb3GD8/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Komagataella pastoris
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2009-02-23 Released: 2009-03-31 
• Deposition Author(s): Ho, J.D., Yeh, R., Sandstrom, A., Chorny, I., Harries, W.E.C., Robbins, R.A., Miercke, L.J.W., Stroud, R.M., Center for Structures of Membrane Proteins (CSMP)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.165 
• R-Value Work: 0.160 
• R-Value Observed: 0.160 

Biological Assembly 1  

Global Symmetry: Cyclic - C4  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 24.28 kDa 
• Atom Count: 1,779 
• Modelled Residue Count: 223 
• Deposited Residue Count: 223 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Aquaporin-4	A	223	Homo sapiens	Mutation(s): 0  Gene Names: AQP4 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P55087 (Homo sapiens) Explore P55087  Go to UniProtKB:  P55087
PHAROS:  P55087 GTEx:  ENSG00000171885

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BOG	G [auth A]	octyl beta-D-glucopyranoside C14 H28 O6 HEGSGKPQLMEBJL-RKQHYHRCSA-N
GOL	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.165 
• R-Value Work: 0.160 
• R-Value Observed: 0.160 
• Space Group: P 4 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.058	α = 90
b = 82.058	β = 90
c = 76.353	γ = 90

Software Package:

Software Name	Purpose
Blu-Ice	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-03-31 
Deposition Author(s): Ho, J.D., Yeh, R., Sandstrom, A., Chorny, I., Harries, W.E.C., Robbins, R.A., Miercke, L.J.W., Stroud, R.M., Center for Structures of Membrane Proteins (CSMP)

Revision History  

• Version 1.0: 2009-03-31
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Structure summary
• Version 1.3: 2024-02-21
  Changes: Data collection, Database references, Structure summary