8E34

CryoEM structures of bAE1 captured in multiple states


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

CryoEM structures of anion exchanger 1 capture multiple states of inward- and outward-facing conformations.

Zhekova, H.R.Jiang, J.Wang, W.Tsirulnikov, K.Kayik, G.Khan, H.M.Azimov, R.Abuladze, N.Kao, L.Newman, D.Noskov, S.Y.Tieleman, D.P.Hong Zhou, Z.Pushkin, A.Kurtz, I.

(2022) Commun Biol 5: 1372-1372

  • DOI: 10.1038/s42003-022-04306-8
  • Primary Citation of Related Structures:  
    8D9N, 8E34, 8EEQ

  • PubMed Abstract: 
  • Anion exchanger 1 (AE1, band 3) is a major membrane protein of red blood cells and plays a key role in acid-base homeostasis, urine acidification, red blood cell shape regulation, and removal of carbon dioxide during respiration. Though structures of the transmembrane domain (TMD) of three SLC4 transporters, including AE1, have been resolved previously in their outward-facing (OF) state, no mammalian SLC4 structure has been reported in the inward-facing (IF) conformation ...

    Anion exchanger 1 (AE1, band 3) is a major membrane protein of red blood cells and plays a key role in acid-base homeostasis, urine acidification, red blood cell shape regulation, and removal of carbon dioxide during respiration. Though structures of the transmembrane domain (TMD) of three SLC4 transporters, including AE1, have been resolved previously in their outward-facing (OF) state, no mammalian SLC4 structure has been reported in the inward-facing (IF) conformation. Here we present the cryoEM structures of full-length bovine AE1 with its TMD captured in both IF and OF conformations. Remarkably, both IF-IF homodimers and IF-OF heterodimers were detected. The IF structures feature downward movement in the core domain with significant unexpected elongation of TM11. Molecular modeling and structure guided mutagenesis confirmed the functional significance of residues involved in TM11 elongation. Our data provide direct evidence for an elevator-like mechanism of ion transport by an SLC4 family member.


    Organizational Affiliation

    Brain Research Institute, University of California, Los Angeles, CA, USA. ikurtz@mednet.ucla.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Anion exchange proteinB [auth A],
A [auth B]
930Bos taurusMutation(s): 0 
Gene Names: SLC4A1BEB3
UniProt
Find proteins for Q9XSW5 (Bos taurus)
Explore Q9XSW5 
Go to UniProtKB:  Q9XSW5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9XSW5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesR01DK077162
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesR01GM071940

Revision History  (Full details and data files)

  • Version 1.0: 2023-01-25
    Type: Initial release