Structure of R932A/K1147A/H1148A mutant AE2

Experimental Data Snapshot

  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

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Structural and functional insights into the lipid regulation of human anion exchanger 2.

Zhang, W.Ding, D.Lu, Y.Chen, H.Jiang, P.Zuo, P.Wang, G.Luo, J.Yin, Y.Luo, J.Yin, Y.

(2024) Nat Commun 15: 759-759

  • DOI: https://doi.org/10.1038/s41467-024-44966-0
  • Primary Citation of Related Structures:  
    8JNI, 8JNJ

  • PubMed Abstract: 

    Anion exchanger 2 (AE2) is an electroneutral Na + -independent Cl - /HCO 3 - exchanger belongs to the SLC4 transporter family. The widely expressed AE2 participates in a variety of physiological processes, including transepithelial acid-base secretion and osteoclastogenesis. Both the transmembrane domains (TMDs) and the N-terminal cytoplasmic domain (NTD) are involved in regulation of AE2 activity. However, the regulatory mechanism remains unclear. Here, we report a 3.2 Å cryo-EM structure of the AE2 TMDs in complex with PIP 2 and a 3.3 Å full-length mutant AE2 structure in the resting state without PIP 2 . We demonstrate that PIP 2 at the TMD dimer interface is involved in the substrate exchange process. Mutation in the PIP 2 binding site leads to the displacement of TM7 and further stabilizes the interaction between the TMD and the NTD. Reduced substrate transport activity and conformation similar to AE2 in acidic pH indicating the central contribution of PIP 2 to the function of AE2.

  • Organizational Affiliation

    Institute of Precision Medicine, Peking University Shenzhen Hospital, Shenzhen, 518036, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Anion exchange protein 2
A, B
1,241Homo sapiensMutation(s): 3 
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P04920 (Homo sapiens)
Explore P04920 
Go to UniProtKB:  P04920
PHAROS:  P04920
GTEx:  ENSG00000164889 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04920
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China81874235
National Natural Science Foundation of China (NSFC)China82030081

Revision History  (Full details and data files)

  • Version 1.0: 2024-02-07
    Type: Initial release