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Yorodumi- EMDB-53122: Cryo-EM structure of the cofilactin barbed end bound by two AIP1 ... -
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Basic information
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| Title | Cryo-EM structure of the cofilactin barbed end bound by two AIP1 molecules | |||||||||||||||
Map data | Main, sharpened cryo-EM density map of the cofilactin barbed end bound by two AIP1 molecules | |||||||||||||||
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Keywords | actin / cofilin / AIP1 / barbed end / filament / cytoskeleton / STRUCTURAL PROTEIN | |||||||||||||||
| Function / homology | Function and homology informationestablishment of planar polarity of follicular epithelium / regulation of actin filament depolymerization / regulation of oligodendrocyte differentiation / cellular response to ether / cofilin-actin rod / positive regulation of protein localization to cell leading edge / positive regulation of establishment of cell polarity regulating cell shape / negative regulation of unidimensional cell growth / positive regulation of barbed-end actin filament capping / neural fold formation ...establishment of planar polarity of follicular epithelium / regulation of actin filament depolymerization / regulation of oligodendrocyte differentiation / cellular response to ether / cofilin-actin rod / positive regulation of protein localization to cell leading edge / positive regulation of establishment of cell polarity regulating cell shape / negative regulation of unidimensional cell growth / positive regulation of barbed-end actin filament capping / neural fold formation / negative regulation of lamellipodium assembly / MGMT-mediated DNA damage reversal / negative regulation of postsynaptic density organization / methylated-DNA-[protein]-cysteine S-methyltransferase / methylated-DNA-[protein]-cysteine S-methyltransferase activity / actin filament fragmentation / maintenance of epithelial cell apical/basal polarity / positive regulation of actin filament depolymerization / negative regulation of actin filament bundle assembly / positive regulation of embryonic development / modification of postsynaptic actin cytoskeleton / positive regulation of norepinephrine uptake / DNA-methyltransferase activity / negative regulation of actin filament depolymerization / neutrophil migration / cortical cytoskeleton organization / cellular response to cytochalasin B / Formation of the embryonic stem cell BAF (esBAF) complex / bBAF complex / npBAF complex / brahma complex / nBAF complex / Formation of the canonical BAF (cBAF) complex / actin filament severing / regulation of transepithelial transport / apical junction assembly / host-mediated activation of viral process / Formation of neuronal progenitor and neuronal BAF (npBAF and nBAF) / morphogenesis of a polarized epithelium / Formation of the polybromo-BAF (pBAF) complex / structural constituent of postsynaptic actin cytoskeleton / Formation of annular gap junctions / Formation of the dystrophin-glycoprotein complex (DGC) / positive regulation of synaptic plasticity / regulation of dendritic spine morphogenesis / Gap junction degradation / establishment of spindle localization / Formation of the non-canonical BAF (ncBAF) complex / GBAF complex / protein localization to adherens junction / regulation of G0 to G1 transition / Cell-extracellular matrix interactions / negative regulation of cell adhesion / DNA alkylation repair / dense body / negative regulation of cell motility / Folding of actin by CCT/TriC / Tat protein binding / regulation of ventricular cardiac muscle cell membrane repolarization / actin filament depolymerization / RHO GTPases Activate ROCKs / postsynaptic actin cytoskeleton / negative regulation of cell size / RSC-type complex / cellular response to interleukin-6 / neutrophil mediated immunity / Regulation of CDH1 Function / regulation of double-strand break repair / podosome / regulation of cell morphogenesis / regulation of nucleotide-excision repair / Prefoldin mediated transfer of substrate to CCT/TriC / Adherens junctions interactions / RHOF GTPase cycle / adherens junction assembly / locomotion / cell projection organization / apical protein localization / negative regulation of dendritic spine maintenance / Sensory processing of sound by outer hair cells of the cochlea / platelet formation / Interaction between L1 and Ankyrins / positive regulation of cell motility / SWI/SNF complex / regulation of mitotic metaphase/anaphase transition / tight junction / Sensory processing of sound by inner hair cells of the cochlea / neural crest cell migration / positive regulation of T cell differentiation / sarcomere organization / cortical actin cytoskeleton / apical junction complex / phosphatidylinositol bisphosphate binding / cellular response to insulin-like growth factor stimulus / positive regulation of double-strand break repair / establishment of cell polarity / maintenance of blood-brain barrier / positive regulation of dendritic spine development / regulation of norepinephrine uptake / transporter regulator activity Similarity search - Function | |||||||||||||||
| Biological species | Homo sapiens (human) | |||||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.16 Å | |||||||||||||||
Authors | Oosterheert W / Boiero Sanders M / Hofnagel O / Bieling P / Raunser S | |||||||||||||||
| Funding support | Germany, European Union, 4 items
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Citation | Journal: Cell / Year: 2025Title: Choreography of rapid actin filament disassembly by coronin, cofilin, and AIP1. Authors: Wout Oosterheert / Micaela Boiero Sanders / Oliver Hofnagel / Peter Bieling / Stefan Raunser / ![]() Abstract: Rapid remodeling of actin filament (F-actin) networks is essential for the movement and morphogenesis of eukaryotic cells. The conserved actin-binding proteins coronin, cofilin, and actin-interacting ...Rapid remodeling of actin filament (F-actin) networks is essential for the movement and morphogenesis of eukaryotic cells. The conserved actin-binding proteins coronin, cofilin, and actin-interacting protein 1 (AIP1) act in synergy to promote rapid F-actin network disassembly, but the underlying mechanisms have remained elusive. Here, using cryo-electron microscopy (cryo-EM), we uncover the concerted molecular actions of coronin, cofilin, and AIP1 that lead to actin filament aging and severing. We find that the cooperative binding of coronin allosterically promotes inorganic phosphate release from F-actin and induces filament undertwisting, thereby priming the filament for cofilin binding. Cofilin then displaces coronin from the filament via a strand-restricted cooperative binding mechanism. The resulting cofilactin serves as a high-affinity platform for AIP1, which induces severing by acting as a clamp that disrupts inter-subunit filament contacts. In this "molecular squeezing" mechanism, AIP1 and not cofilin is responsible for filament severing. Our work redefines the role of key disassembly factors in actin dynamics. | |||||||||||||||
| History |
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_53122.map.gz | 778.5 MB | EMDB map data format | |
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| Header (meta data) | emd-53122-v30.xml emd-53122.xml | 30.9 KB 30.9 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_53122_fsc.xml | 20 KB | Display | FSC data file |
| Images | emd_53122.png | 169.2 KB | ||
| Masks | emd_53122_msk_1.map | 824 MB | Mask map | |
| Filedesc metadata | emd-53122.cif.gz | 8.2 KB | ||
| Others | emd_53122_additional_1.map.gz emd_53122_half_map_1.map.gz emd_53122_half_map_2.map.gz | 409.3 MB 763.9 MB 763.9 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-53122 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-53122 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9qfwMC ![]() 9qewC ![]() 9qeyC ![]() 9qf2C ![]() 9qfbC ![]() 9qfdC ![]() 9qfeC ![]() 9qfgC ![]() 9qfjC ![]() 9qfkC ![]() 9qfoC ![]() 9qfqC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_53122.map.gz / Format: CCP4 / Size: 824 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | Main, sharpened cryo-EM density map of the cofilactin barbed end bound by two AIP1 molecules | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.68 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Mask #1
| File | emd_53122_msk_1.map | ||||||||||||
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| Projections & Slices |
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| Density Histograms |
-Additional map: Additional unsharpened map of the cofilactin barbed end...
| File | emd_53122_additional_1.map | ||||||||||||
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| Annotation | Additional unsharpened map of the cofilactin barbed end bound by two AIP1 molecules | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: Half map B of the cofilactin barbed end bound by two AIP1 molecules
| File | emd_53122_half_map_1.map | ||||||||||||
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| Annotation | Half map B of the cofilactin barbed end bound by two AIP1 molecules | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: Half map A of the cofilactin barbed end bound by two AIP1 molecules
| File | emd_53122_half_map_2.map | ||||||||||||
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| Annotation | Half map A of the cofilactin barbed end bound by two AIP1 molecules | ||||||||||||
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| Density Histograms |
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Sample components
-Entire : Cofilactin barbed end bound by two AIP1 molecules
| Entire | Name: Cofilactin barbed end bound by two AIP1 molecules |
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| Components |
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-Supramolecule #1: Cofilactin barbed end bound by two AIP1 molecules
| Supramolecule | Name: Cofilactin barbed end bound by two AIP1 molecules / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3 Details: Barbed end of the actin filament fully decorated by Cofilin-1 and bound by two AIP1 molecules |
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| Source (natural) | Organism: Homo sapiens (human) |
-Supramolecule #2: Actin filament
| Supramolecule | Name: Actin filament / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Supramolecule #3: Cofilin-1
| Supramolecule | Name: Cofilin-1 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Supramolecule #4: AIP1
| Supramolecule | Name: AIP1 / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #3 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Macromolecule #1: Actin, cytoplasmic 1, N-terminally processed
| Macromolecule | Name: Actin, cytoplasmic 1, N-terminally processed / type: protein_or_peptide / ID: 1 / Number of copies: 5 / Enantiomer: LEVO |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 41.632422 KDa |
| Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
| Sequence | String: DDDIAALVVD NGSGMCKAGF AGDDAPRAVF PSIVGRPRHQ GVMVGMGQKD SYVGDEAQSK RGILTLKYPI E(HIC)GIVT NWD DMEKIWHHTF YNELRVAPEE HPVLLTEAPL NPKANREKMT QIMFETFNTP AMYVAIQAVL SLYASGRTTG IVMDSGD GV THTVPIYEGY ...String: DDDIAALVVD NGSGMCKAGF AGDDAPRAVF PSIVGRPRHQ GVMVGMGQKD SYVGDEAQSK RGILTLKYPI E(HIC)GIVT NWD DMEKIWHHTF YNELRVAPEE HPVLLTEAPL NPKANREKMT QIMFETFNTP AMYVAIQAVL SLYASGRTTG IVMDSGD GV THTVPIYEGY ALPHAILRLD LAGRDLTDYL MKILTERGYS FTTTAEREIV RDIKEKLCYV ALDFEQEMAT AASSSSLE K SYELPDGQVI TIGNERFRCP EALFQPSFLG MESAGIHETT FNSIMKCDVD IRKDLYANTV LSGGTTMYPG IADRMQKEI TALAPSTMKI KIIAPPERKY SVWIGGSILA SLSTFQQMWI SKQEYDESGP SIVHRKCF UniProtKB: Actin, cytoplasmic 1 |
-Macromolecule #2: Cofilin-1
| Macromolecule | Name: Cofilin-1 / type: protein_or_peptide / ID: 2 / Number of copies: 5 / Enantiomer: LEVO |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 18.532531 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MASGVAVSDG VIKVFNDMKV RKSSTPEEVK KRKKAVLFCL SEDKKNIILE EGKEILVGDV GQTVDDPYAT FVKMLPDKDC RYALYDATY ETKESKKEDL VFIFWAPESA PLKSKMIYAS SKDAIKKKLT GIKHELQANC YEEVKDRCTL AEKLGGSAVI S LEGKPL UniProtKB: Cofilin-1 |
-Macromolecule #3: WD repeat-containing protein 1,Methylated-DNA--protein-cysteine m...
| Macromolecule | Name: WD repeat-containing protein 1,Methylated-DNA--protein-cysteine methyltransferase type: protein_or_peptide / ID: 3 Details: AIP1 has a C-terminal SNAP tag,AIP1 has a C-terminal SNAP tag Number of copies: 2 / Enantiomer: LEVO EC number: methylated-DNA-[protein]-cysteine S-methyltransferase |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 86.760906 KDa |
| Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
| Sequence | String: GAMGSMPYEI KKVFASLPQV ERGVSKIIGG DPKGNNFLYT NGKCVILRNI DNPALADIYT EHAHQVVVAK YAPSGFYIAS GDVSGKLRI WDTTQKEHLL KYEYQPFAGK IKDIAWTEDS KRIAVVGEGR EKFGAVFLWD SGSSVGEITG HNKVINSVDI K QSRPYRLA ...String: GAMGSMPYEI KKVFASLPQV ERGVSKIIGG DPKGNNFLYT NGKCVILRNI DNPALADIYT EHAHQVVVAK YAPSGFYIAS GDVSGKLRI WDTTQKEHLL KYEYQPFAGK IKDIAWTEDS KRIAVVGEGR EKFGAVFLWD SGSSVGEITG HNKVINSVDI K QSRPYRLA TGSDDNCAAF FEGPPFKFKF TIGDHSRFVN CVRFSPDGNR FATASADGQI YIYDGKTGEK VCALGGSKAH DG GIYAISW SPDSTHLLSA SGDKTSKIWD VSVNSVVSTF PMGSTVLDQQ LGCLWQKDHL LSVSLSGYIN YLDRNNPSKP LHV IKGHSK SIQCLTVHKN GGKSYIYSGS HDGHINYWDS ETGENDSFAG KGHTNQVSRM TVDESGQLIS CSMDDTVRYT SLML RDYSG QGVVKLDVQP KCVAVGPGGY AVVVCIGQIV LLKDQRKCFS IDNPGYEPEV VAVHPGGDTV AIGGVDGNVR LYSIL GTTL KDEGKLLEAK GPVTDVAYSH DGAFLAVCDA SKVVTVFSVA DGYSENNVFY GHHAKIVCLA WSPDNEHFAS GGMDMM VYV WTLSDPETRV KIQDAHRLHH VSSLAWLDEH TLVTTSHDAS VKEWTITYGT GGGGSGGGGS MDKDCEMKRT TLDSPLG KL ELSGCEQGLH EIKLLGKGTS AADAVEVPAP AAVLGGPEPL MQATAWLNAY FHQPEAIEEF PVPALHHPVF QQESFTRQ V LWKLLKVVKF GEVISYQQLA ALAGNPAATA AVKTALSGNP VPILIPCHRV VSSSGAVGGY EGGLAVKEWL LAHEGHRLG KPGLG UniProtKB: WD repeat-containing protein 1, Methylated-DNA--protein-cysteine methyltransferase |
-Macromolecule #4: MAGNESIUM ION
| Macromolecule | Name: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 5 / Formula: MG |
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| Molecular weight | Theoretical: 24.305 Da |
-Macromolecule #5: ADENOSINE-5'-DIPHOSPHATE
| Macromolecule | Name: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 5 / Number of copies: 5 / Formula: ADP |
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| Molecular weight | Theoretical: 427.201 Da |
| Chemical component information | ![]() ChemComp-ADP: |
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | filament |
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Sample preparation
| Buffer | pH: 7.1 Component:
Details: 1xKMEH (10 mM HEPES pH 7.1, 100 mM KCl, 2 mM MgCl2, 1 mM EGTA, 0.5 mM TCEP, 0.015% Tween20) | ||||||||||||||
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| Grid | Model: Quantifoil R2/1 / Material: GOLD / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY | ||||||||||||||
| Vitrification | Cryogen name: ETHANE-PROPANE / Chamber humidity: 100 % / Chamber temperature: 286 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Specialist optics | Spherical aberration corrector: Data were collected using a 300 kV Titan Krios G2 microscope (Thermo Fisher Scientific) equipped with an in-column Cs corrector Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 15 eV |
| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 1 / Number real images: 23082 / Average electron dose: 71.7 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 0.01 mm / Nominal defocus max: 2.7 µm / Nominal defocus min: 1.2 µm |
| 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
| Initial model |
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| Details | Phenix real space refinement | ||||||
| Refinement | Space: REAL / Protocol: FLEXIBLE FIT | ||||||
| Output model | ![]() PDB-9qfw: |
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Keywords
Homo sapiens (human)
Authors
Germany, European Union, 4 items
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Trichoplusia ni (cabbage looper)

FIELD EMISSION GUN


