8AMX

AQP7 dimer of tetramers_D4


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.55 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM structure supports a role of AQP7 as a junction protein.

Huang, P.Venskutonyte, R.Prasad, R.B.Ardalani, H.de Mare, S.W.Fan, X.Li, P.Spegel, P.Yan, N.Gourdon, P.Artner, I.Lindkvist-Petersson, K.

(2023) Nat Commun 14: 600-600

  • DOI: https://doi.org/10.1038/s41467-023-36272-y
  • Primary Citation of Related Structures:  
    8AMW, 8AMX

  • PubMed Abstract: 

    Aquaglyceroporin 7 (AQP7) facilitates glycerol flux across the plasma membrane with a critical physiological role linked to metabolism, obesity, and associated diseases. Here, we present the single-particle cryo-EM structure of AQP7 determined at 2.55 Å resolution adopting two adhering tetramers, stabilized by extracellularly exposed loops, in a configuration like that of the well-characterized interaction of AQP0 tetramers. The central pore, in-between the four monomers, displays well-defined densities restricted by two leucine filters. Gas chromatography mass spectrometry (GC/MS) results show that the AQP7 sample contains glycerol 3-phosphate (Gro3P), which is compatible with the identified features in the central pore. AQP7 is shown to be highly expressed in human pancreatic α- and β- cells suggesting that the identified AQP7 octamer assembly, in addition to its function as glycerol channel, may serve as junction proteins within the endocrine pancreas.


  • Organizational Affiliation

    Department of Experimental Medical Science, Lund University, Lund, Sweden.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aquaporin-7
A, B, C, D, E
A, B, C, D, E, F, G, H
342Homo sapiensMutation(s): 0 
Gene Names: AQP7AQP7LAQP9
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for O14520 (Homo sapiens)
Explore O14520 
Go to UniProtKB:  O14520
PHAROS:  O14520
GTEx:  ENSG00000165269 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14520
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.55 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX
RECONSTRUCTIONcryoSPARC

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden2017-05816, 2016-01319
Other governmentSwedish Cancer Society 20 0747 PjF

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-15
    Type: Initial release
  • Version 1.1: 2024-07-24
    Changes: Data collection