EMD-26954
Local refinement of Band 3-II transmembrane domains, class 1 of erythrocyte ankyrin-1 complex
EMD-26954
Single-particle3.3 Å
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Map released: 20/07/2022
Last modified: 23/10/2024
Sample Organism:
Homo sapiens
Sample: Erythrocyte ankyrin-1 complex
Fitted models: 7v19 (Avg. Q-score: 0.484)
Deposition Authors: Vallese F
,
Kim K
,
Yen LY,
Johnston JD
,
Noble AJ
,
Cali T
,
Clarke OB
Sample: Erythrocyte ankyrin-1 complex
Fitted models: 7v19 (Avg. Q-score: 0.484)
Deposition Authors: Vallese F
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Architecture of the human erythrocyte ankyrin-1 complex.
Vallese F
,
Kim K
,
Yen LY,
Johnston JD
,
Noble AJ
,
Cali T
,
Clarke OB
(2022) Nat Struct Mol Biol , 29 , 706 - 718
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(2022) Nat Struct Mol Biol , 29 , 706 - 718
Abstract:
The stability and shape of the erythrocyte membrane is provided by the ankyrin-1 complex, but how it tethers the spectrin-actin cytoskeleton to the lipid bilayer and the nature of its association with the band 3 anion exchanger and the Rhesus glycoproteins remains unknown. Here we present structures of ankyrin-1 complexes purified from human erythrocytes. We reveal the architecture of a core complex of ankyrin-1, the Rhesus proteins RhAG and RhCE, the band 3 anion exchanger, protein 4.2, glycophorin A and glycophorin B. The distinct T-shaped conformation of membrane-bound ankyrin-1 facilitates recognition of RhCE and, unexpectedly, the water channel aquaporin-1. Together, our results uncover the molecular details of ankyrin-1 association with the erythrocyte membrane, and illustrate the mechanism of ankyrin-mediated membrane protein clustering.
The stability and shape of the erythrocyte membrane is provided by the ankyrin-1 complex, but how it tethers the spectrin-actin cytoskeleton to the lipid bilayer and the nature of its association with the band 3 anion exchanger and the Rhesus glycoproteins remains unknown. Here we present structures of ankyrin-1 complexes purified from human erythrocytes. We reveal the architecture of a core complex of ankyrin-1, the Rhesus proteins RhAG and RhCE, the band 3 anion exchanger, protein 4.2, glycophorin A and glycophorin B. The distinct T-shaped conformation of membrane-bound ankyrin-1 facilitates recognition of RhCE and, unexpectedly, the water channel aquaporin-1. Together, our results uncover the molecular details of ankyrin-1 association with the erythrocyte membrane, and illustrate the mechanism of ankyrin-mediated membrane protein clustering.