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- EMDB-26146: Cryo-EM structure of human band 3-protein 4.2 complex in vertical... -
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Basic information
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Title | Cryo-EM structure of human band 3-protein 4.2 complex in vertical conformation | |||||||||
![]() | band 3-protein 4.2 complex in vertical conformation | |||||||||
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Function / homology | ![]() hemoglobin metabolic process / protein-glutamine gamma-glutamyltransferase activity / pH elevation / Defective SLC4A1 causes hereditary spherocytosis type 4 (HSP4), distal renal tubular acidosis (dRTA) and dRTA with hemolytic anemia (dRTA-HA) / negative regulation of urine volume / Bicarbonate transporters / intracellular monoatomic ion homeostasis / ankyrin-1 complex / plasma membrane phospholipid scrambling / monoatomic anion transmembrane transporter activity ...hemoglobin metabolic process / protein-glutamine gamma-glutamyltransferase activity / pH elevation / Defective SLC4A1 causes hereditary spherocytosis type 4 (HSP4), distal renal tubular acidosis (dRTA) and dRTA with hemolytic anemia (dRTA-HA) / negative regulation of urine volume / Bicarbonate transporters / intracellular monoatomic ion homeostasis / ankyrin-1 complex / plasma membrane phospholipid scrambling / monoatomic anion transmembrane transporter activity / chloride:bicarbonate antiporter activity / solute:inorganic anion antiporter activity / bicarbonate transport / bicarbonate transmembrane transporter activity / monoatomic anion transport / chloride transport / chloride transmembrane transporter activity / ankyrin binding / negative regulation of glycolytic process through fructose-6-phosphate / hemoglobin binding / cortical cytoskeleton / erythrocyte maturation / erythrocyte development / protein-membrane adaptor activity / spleen development / chloride transmembrane transport / protein localization to plasma membrane / regulation of intracellular pH / Erythrocytes take up oxygen and release carbon dioxide / Erythrocytes take up carbon dioxide and release oxygen / cell morphogenesis / cytoplasmic side of plasma membrane / structural constituent of cytoskeleton / transmembrane transport / multicellular organismal-level iron ion homeostasis / Z disc / blood coagulation / regulation of cell shape / basolateral plasma membrane / blood microparticle / cytoskeleton / protein homodimerization activity / extracellular exosome / ATP binding / membrane / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.6 Å | |||||||||
![]() | Xia X / Liu SH / Zhou ZH | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structure, dynamics and assembly of the ankyrin complex on human red blood cell membrane. Authors: Xian Xia / Shiheng Liu / Z Hong Zhou / ![]() Abstract: The cytoskeleton of a red blood cell (RBC) is anchored to the cell membrane by the ankyrin complex. This complex is assembled during RBC genesis and comprises primarily band 3, protein 4.2 and ...The cytoskeleton of a red blood cell (RBC) is anchored to the cell membrane by the ankyrin complex. This complex is assembled during RBC genesis and comprises primarily band 3, protein 4.2 and ankyrin, whose mutations contribute to numerous human inherited diseases. High-resolution structures of the ankyrin complex have been long sought-after to understand its assembly and disease-causing mutations. Here, we analyzed native complexes on the human RBC membrane by stepwise fractionation. Cryo-electron microscopy structures of nine band-3-associated complexes reveal that protein 4.2 stabilizes the cytoplasmic domain of band 3 dimer. In turn, the superhelix-shaped ankyrin binds to this protein 4.2 via ankyrin repeats (ARs) 6-13 and to another band 3 dimer via ARs 17-20, bridging two band 3 dimers in the ankyrin complex. Integration of these structures with both prior data and our biochemical data supports a model of ankyrin complex assembly during erythropoiesis and identifies interactions essential for the mechanical stability of RBC. | |||||||||
History |
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Structure visualization
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Downloads & links
-EMDB archive
Map data | ![]() | 116.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 16.6 KB 16.6 KB | Display Display | ![]() |
Images | ![]() | 103.3 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7tw0MC ![]() 7tvzC ![]() 7tw1C ![]() 7tw2C ![]() 7tw3C ![]() 7tw5C ![]() 7tw6C C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | band 3-protein 4.2 complex in vertical conformation | ||||||||||||||||||||
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
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Sample components
-Entire : High-salt fraction 1 from human red blood cell membrane
Entire | Name: High-salt fraction 1 from human red blood cell membrane |
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Components |
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-Supramolecule #1: High-salt fraction 1 from human red blood cell membrane
Supramolecule | Name: High-salt fraction 1 from human red blood cell membrane type: complex / Chimera: Yes / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 280 KDa |
-Macromolecule #1: Band 3 anion transport protein
Macromolecule | Name: Band 3 anion transport protein / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 101.883859 KDa |
Sequence | String: MEELQDDYED MMEENLEQEE YEDPDIPESQ MEEPAAHDTE ATATDYHTTS HPGTHKVYVE LQELVMDEKN QELRWMEAAR WVQLEENLG ENGAWGRPHL SHLTFWSLLE LRRVFTKGTV LLDLQETSLA GVANQLLDRF IFEDQIRPQD REELLRALLL K HSHAGELE ...String: MEELQDDYED MMEENLEQEE YEDPDIPESQ MEEPAAHDTE ATATDYHTTS HPGTHKVYVE LQELVMDEKN QELRWMEAAR WVQLEENLG ENGAWGRPHL SHLTFWSLLE LRRVFTKGTV LLDLQETSLA GVANQLLDRF IFEDQIRPQD REELLRALLL K HSHAGELE ALGGVKPAVL TRSGDPSQPL LPQHSSLETQ LFCEQGDGGT EGHSPSGILE KIPPDSEATL VLVGRADFLE QP VLGFVRL QEAAELEAVE LPVPIRFLFV LLGPEAPHID YTQLGRAAAT LMSERVFRID AYMAQSRGEL LHSLEGFLDC SLV LPPTDA PSEQALLSLV PVQRELLRRR YQSSPAKPDS SFYKGLDLNG GPDDPLQQTG QLFGGLVRDI RRRYPYYLSD ITDA FSPQV LAAVIFIYFA ALSPAITFGG LLGEKTRNQM GVSELLISTA VQGILFALLG AQPLLVVGFS GPLLVFEEAF FSFCE TNGL EYIVGRVWIG FWLILLVVLV VAFEGSFLVR FISRYTQEIF SFLISLIFIY ETFSKLIKIF QDHPLQKTYN YNVLMV PKP QGPLPNTALL SLVLMAGTFF FAMMLRKFKN SSYFPGKLRR VIGDFGVPIS ILIMVLVDFF IQDTYTQKLS VPDGFKV SN SSARGWVIHP LGLRSEFPIW MMFASALPAL LVFILIFLES QITTLIVSKP ERKMVKGSGF HLDLLLVVGM GGVAALFG M PWLSATTVRS VTHANALTVM GKASTPGAAA QIQEVKEQRI SGLLVAVLVG LSILMEPILS RIPLAVLFGI FLYMGVTSL SGIQLFDRIL LLFKPPKYHP DVPYVKRVKT WRMHLFTGIQ IICLAVLWVV KSTPASLALP FVLILTVPLR RVLLPLIFRN VELQCLDAD DAKATFDEEE GRDEYDEVAM PV |
-Macromolecule #2: Protein 4.2
Macromolecule | Name: Protein 4.2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 77.096914 KDa |
Sequence | String: MGQALGIKSC DFQAARNNEE HHTKALSSRR LFVRRGQPFT IILYFRAPVR AFLPALKKVA LTAQTGEQPS KINRTQATFP ISSLGDRKW WSAVVEERDA QSWTISVTTP ADAVIGHYSL LLQVSGRKQL LLGQFTLLFN PWNREDAVFL KNEAQRMEYL L NQNGLIYL ...String: MGQALGIKSC DFQAARNNEE HHTKALSSRR LFVRRGQPFT IILYFRAPVR AFLPALKKVA LTAQTGEQPS KINRTQATFP ISSLGDRKW WSAVVEERDA QSWTISVTTP ADAVIGHYSL LLQVSGRKQL LLGQFTLLFN PWNREDAVFL KNEAQRMEYL L NQNGLIYL GTADCIQAES WDFGQFEGDV IDLSLRLLSK DKQVEKWSQP VHVARVLGAL LHFLKEQRVL PTPQTQATQE GA LLNKRRG SVPILRQWLT GRGRPVYDGQ AWVLAAVACT VLRCLGIPAR VVTTFASAQG TGGRLLIDEY YNEEGLQNGE GQR GRIWIF QTSTECWMTR PALPQGYDGW QILHPSAPNG GGVLGSCDLV PVRAVKEGTL GLTPAVSDLF AAINASCVVW KCCE DGTLE LTDSNTKYVG NNISTKGVGS DRCEDITQNY KYPEGSLQEK EVLERVEKEK MEREKDNGIR PPSLETASPL YLLLK APSS LPLRGDAQIS VTLVNHSEQE KAVQLAIGVQ AVHYNGVLAA KLWRKKLHLT LSANLEKIIT IGLFFSNFER NPPENT FLR LTAMATHSES NLSCFAQEDI AICRPHLAIK MPEKAEQYQP LTASVSLQNS LDAPMEDCVI SILGRGLIHR ERSYRFR SV WPENTMCAKF QFTPTHVGLQ RLTVEVDCNM FQNLTNYKSV TVVAPELSA |
-Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose
Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 2 / Formula: NAG |
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Molecular weight | Theoretical: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 2.5 mg/mL | |||||||||||||||
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Buffer | pH: 7.5 Component:
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Grid | Model: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY | |||||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Temperature | Min: 100.0 K / Max: 100.0 K |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 1 / Number real images: 20842 / Average exposure time: 2.0 sec. / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.5 µm / Nominal defocus min: 1.8 µm / Nominal magnification: 81000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL / Overall B value: 192 |
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Output model | ![]() PDB-7tw0: |