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Open data
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Basic information
Entry | ![]() | |||||||||
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Title | Human AE3 with NaHCO3- | |||||||||
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![]() | bicarbonate / TRANSPORT PROTEIN | |||||||||
Function / homology | ![]() pH reduction / cardiac muscle cell action potential / Bicarbonate transporters / cardiac conduction / chloride:bicarbonate antiporter activity / solute:inorganic anion antiporter activity / bicarbonate transport / bicarbonate transmembrane transporter activity / regulation of cardiac muscle cell action potential / transmembrane transporter activity ...pH reduction / cardiac muscle cell action potential / Bicarbonate transporters / cardiac conduction / chloride:bicarbonate antiporter activity / solute:inorganic anion antiporter activity / bicarbonate transport / bicarbonate transmembrane transporter activity / regulation of cardiac muscle cell action potential / transmembrane transporter activity / transport across blood-brain barrier / regulation of intracellular pH / transmembrane transport / external side of plasma membrane / membrane / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.75 Å | |||||||||
![]() | Jian L / Zhang Q / Yao D / Cao Y | |||||||||
Funding support | ![]()
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![]() | ![]() Title: The structural insight into the functional modulation of human anion exchanger 3. Authors: Liyan Jian / Qing Zhang / Deqiang Yao / Qian Wang / Moxin Chen / Ying Xia / Shaobai Li / Yafeng Shen / Mi Cao / An Qin / Lin Li / Yu Cao / ![]() ![]() Abstract: Anion exchanger 3 (AE3) is pivotal in regulating intracellular pH across excitable tissues, yet its structural intricacies and functional dynamics remain underexplored compared to other anion ...Anion exchanger 3 (AE3) is pivotal in regulating intracellular pH across excitable tissues, yet its structural intricacies and functional dynamics remain underexplored compared to other anion exchangers. This study unveils the structural insights into human AE3, including the cryo-electron microscopy structures for AE3 transmembrane domains (TMD) and a chimera combining AE3 N-terminal domain (NTD) with AE2 TMD (hAE32). Our analyzes reveal a substrate binding site, an NTD-TMD interlock mechanism, and a preference for an outward-facing conformation. Unlike AE2, which has more robust acid-loading capabilities, AE3's structure, including a less stable inward-facing conformation due to missing key NTD-TMD interactions, contributes to its moderated pH-modulating activity and increased sensitivity to the inhibitor DIDS. These structural differences underline AE3's distinct functional roles in specific tissues and underscore the complex interplay between structural dynamics and functional specificity within the anion exchanger family, enhancing our understanding of the physiological and pathological roles of the anion exchanger family. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 59.7 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.8 KB 14.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 8.4 KB | Display | ![]() |
Images | ![]() | 68 KB | ||
Filedesc metadata | ![]() | 6 KB | ||
Others | ![]() ![]() | 59.2 MB 59.2 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8y86MC ![]() 8y85C ![]() 8y8kC ![]() 8zleC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Map
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Voxel size | X=Y=Z: 1.1 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_39035_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_39035_half_map_2.map | ||||||||||||
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Density Histograms |
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Sample components
-Entire : Anion exchange protein 3
Entire | Name: Anion exchange protein 3 |
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Components |
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-Supramolecule #1: Anion exchange protein 3
Supramolecule | Name: Anion exchange protein 3 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 135 KDa |
-Macromolecule #1: Anion exchange protein 3
Macromolecule | Name: Anion exchange protein 3 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 135.961516 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MANGVIPPPG GASPLPQVRV PLEEPPLSPD VEEEDDDLGK TLAVSRFGDL ISKPPAWDPE KPSRSYSERD FEFHRHTSHH THHPLSARL PPPHKLRRLP PTSARHTRRK RKKEKTSAPP SEGTPPIQEE GGAGVDEEEE EEEEEEGESE AEPVEPPHSG T PQKAKFSI ...String: MANGVIPPPG GASPLPQVRV PLEEPPLSPD VEEEDDDLGK TLAVSRFGDL ISKPPAWDPE KPSRSYSERD FEFHRHTSHH THHPLSARL PPPHKLRRLP PTSARHTRRK RKKEKTSAPP SEGTPPIQEE GGAGVDEEEE EEEEEEGESE AEPVEPPHSG T PQKAKFSI GSDEDDSPGL PGRAAVTKPL PSVGPHTDKS PQHSSSSPSP RARASRLAGE KSRPWSPSAS YDLRERLCPG SA LGNPGGP EQQVPTDEAE AQMLGSADLD DMKSHRLEDN PGVRRHLVKK PSRTQGGRGS PSGLAPILRR KKKKKKLDRR PHE VFVELN ELMLDRSQEP HWRETARWIK FEEDVEEETE RWGKPHVASL SFRSLLELRR TIAHGAALLD LEQTTLPGIA HLVV ETMIV SDQIRPEDRA SVLRTLLLKH SHPNDDKDSG FFPRNPSSSS MNSVLGNHHP TPSHGPDGAV PTMADDLGEP APLWP HDPD AKEKPLHMPG GDGHRGKSLK LLEKIPEDAE ATVVLVGCVP FLEQPAAAFV RLNEAVLLES VLEVPVPVRF LFVMLG PSH TSTDYHELGR SIATLMSDKL FHEAAYQADD RQDLLSAISE FLDGSIVIPP SEVEGRDLLR SVAAFQRELL RKRRERE QT KVEMTTRGGY TAPGKELSLE LGGSEATPED DPLLRTGSVF GGLVRDVRRR YPHYPSDLRD ALHSQCVAAV LFIYFAAL S PAITFGGLLG EKTEGLMGVS ELIVSTAVLG VLFSLLGAQP LLVVGFSGPL LVFEEAFFKF CRAQDLEYLT GRVWVGLWL VVFVLALVAA EGSFLVRYIS PFTQEIFAFL ISLIFIYETF YKLYKVFTEH PLLPFYPPEG ALEGSLDAGL EPNGSALPPT EGPPSPRNQ PNTALLSLIL MLGTFFIAFF LRKFRNSRFL GGKARRIIGD FGIPISILVM VLVDYSITDT YTQKLTVPTG L SVTSPDKR SWFIPPLGSA RPFPPWMMVA AAVPALLVLI LIFMETQITA LIVSQKARRL LKGSGFHLDL LLIGSLGGLC GL FGLPWLT AATVRSVTHV NALTVMRTAI APGDKPQIQE VREQRVTGVL IASLVGLSIV MGAVLRRIPL AVLFGIFLYM GVT SLSGIQ LSQRLLLILM PAKHHPEQPY VTKVKTWRMH LFTCIQLGCI ALLWVVKSTA ASLAFPFLLL LTVPLRHCLL PRLF QDREL QALDSEDAEP NFDEDGQDEY NELHMPV UniProtKB: Anion exchange protein 3 |
-Macromolecule #2: BICARBONATE ION
Macromolecule | Name: BICARBONATE ION / type: ligand / ID: 2 / Number of copies: 2 / Formula: BCT |
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Molecular weight | Theoretical: 61.017 Da |
Chemical component information | ![]() ChemComp-BCT: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.6 µm / Nominal defocus min: 1.0 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |