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Yorodumi- EMDB-53108: Cryo-EM structure of the actin filament hetero-decorated by Coron... -
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Basic information
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| Title | Cryo-EM structure of the actin filament hetero-decorated by Coronin-1 and Cofilin-1, strand boundary | |||||||||||||||
Map data | Main, sharpened cryo-EM density map of the hetero-decorated actin filament revealing a transition from Coronin-1 to Cofilin-1 decoration | |||||||||||||||
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Keywords | actin / coronin / cofilin / filament / cytoskeleton / STRUCTURAL PROTEIN | |||||||||||||||
| Function / homology | Function and homology informationactin filament branching / MGMT-mediated DNA damage reversal / 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 ...actin filament branching / MGMT-mediated DNA damage reversal / 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 / negative regulation of postsynaptic density organization / protein localization to cell leading edge / actin filament fragmentation / methylated-DNA-[protein]-cysteine S-methyltransferase / methylated-DNA-[protein]-cysteine S-methyltransferase activity / Arp2/3 complex binding / positive regulation of actin filament depolymerization / negative regulation of smooth muscle cell chemotaxis / modification of postsynaptic actin cytoskeleton / regulation of Arp2/3 complex-mediated actin nucleation / positive regulation of embryonic development / positive regulation of norepinephrine uptake / DNA-methyltransferase activity / negative regulation of actin filament bundle assembly / negative regulation of Arp2/3 complex-mediated actin nucleation / positive regulation of synaptic plasticity / endothelial cell chemotaxis / negative regulation of actin filament depolymerization / cellular response to cytochalasin B / bBAF complex / npBAF complex / actin filament severing / nBAF complex / brahma complex / regulation of transepithelial transport / Formation of annular gap junctions / morphogenesis of a polarized epithelium / Formation of the dystrophin-glycoprotein complex (DGC) / structural constituent of postsynaptic actin cytoskeleton / Gap junction degradation / GBAF complex / Folding of actin by CCT/TriC / protein localization to adherens junction / establishment of spindle localization / regulation of G0 to G1 transition / regulation of dendritic spine morphogenesis / Cell-extracellular matrix interactions / host-mediated activation of viral process / actin filament depolymerization / dense body / Tat protein binding / cell projection organization / ruffle organization / postsynaptic actin cytoskeleton / negative regulation of cell adhesion / DNA alkylation repair / negative regulation of cell motility / Prefoldin mediated transfer of substrate to CCT/TriC / RSC-type complex / RHO GTPases Activate ROCKs / negative regulation of cell size / regulation of double-strand break repair / regulation of nucleotide-excision repair / cellular response to interleukin-6 / regulation of cell morphogenesis / Adherens junctions interactions / RHOF GTPase cycle / negative regulation of dendritic spine maintenance / adherens junction assembly / positive regulation of lamellipodium morphogenesis / apical protein localization / Sensory processing of sound by outer hair cells of the cochlea / neural crest cell migration / Interaction between L1 and Ankyrins / tight junction / regulation of mitotic metaphase/anaphase transition / SWI/SNF complex / Sensory processing of sound by inner hair cells of the cochlea / positive regulation of cell motility / positive regulation of T cell differentiation / cortical actin cytoskeleton / apical junction complex / phosphatidylinositol bisphosphate binding / cellular response to insulin-like growth factor stimulus / positive regulation of double-strand break repair / maintenance of blood-brain barrier / regulation of norepinephrine uptake / nitric-oxide synthase binding / transporter regulator activity / establishment of cell polarity / positive regulation of dendritic spine development / cortical cytoskeleton / NuA4 histone acetyltransferase complex / establishment or maintenance of cell polarity / positive regulation of stem cell population maintenance / cell leading edge / Recycling pathway of L1 / Regulation of MITF-M-dependent genes involved in pigmentation / brush border / mitotic cytokinesis Similarity search - Function | |||||||||||||||
| Biological species | Homo sapiens (human) | |||||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.49 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. | |||||||||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_53108.map.gz | 778.4 MB | EMDB map data format | |
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| Header (meta data) | emd-53108-v30.xml emd-53108.xml | 30.2 KB 30.2 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_53108_fsc.xml | 20 KB | Display | FSC data file |
| Images | emd_53108.png | 134.4 KB | ||
| Masks | emd_53108_msk_1.map | 824 MB | Mask map | |
| Filedesc metadata | emd-53108.cif.gz | 8.1 KB | ||
| Others | emd_53108_additional_1.map.gz emd_53108_half_map_1.map.gz emd_53108_half_map_2.map.gz | 408.6 MB 765.2 MB 765.2 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-53108 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-53108 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9qfgMC ![]() 9qewC ![]() 9qeyC ![]() 9qf2C ![]() 9qfbC ![]() 9qfdC ![]() 9qfeC ![]() 9qfjC ![]() 9qfkC ![]() 9qfoC ![]() 9qfqC ![]() 9qfwC 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_53108.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 hetero-decorated actin filament revealing a transition from Coronin-1 to Cofilin-1 decoration | ||||||||||||||||||||||||||||||||||||
| 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_53108_msk_1.map | ||||||||||||
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| Projections & Slices |
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| Density Histograms |
-Additional map: Additional unsharpened map of the hetero-decorated actin filament...
| File | emd_53108_additional_1.map | ||||||||||||
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| Annotation | Additional unsharpened map of the hetero-decorated actin filament revealing a transition from Coronin-1 to Cofilin-1 decoration | ||||||||||||
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| Density Histograms |
-Half map: Half map B of the hetero-decorated actin filament...
| File | emd_53108_half_map_1.map | ||||||||||||
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| Annotation | Half map B of the hetero-decorated actin filament revealing a transition from Coronin-1 to Cofilin-1 decoration | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: Half map A of the hetero-decorated actin filament...
| File | emd_53108_half_map_2.map | ||||||||||||
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| Annotation | Half map A of the hetero-decorated actin filament revealing a transition from Coronin-1 to Cofilin-1 decoration | ||||||||||||
| Projections & Slices |
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| Density Histograms |
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Sample components
-Entire : Beta-actin filament hetero-decorated by Coronin-1B and Cofilin-1,...
| Entire | Name: Beta-actin filament hetero-decorated by Coronin-1B and Cofilin-1, revealing a strand boundary. |
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| Components |
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-Supramolecule #1: Beta-actin filament hetero-decorated by Coronin-1B and Cofilin-1,...
| Supramolecule | Name: Beta-actin filament hetero-decorated by Coronin-1B and Cofilin-1, revealing a strand boundary. type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3 |
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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: #3 Details: Assembled as a double stranded helix of beta-actin subunits. |
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| Source (natural) | Organism: Homo sapiens (human) |
-Supramolecule #3: Coronin-1B
| Supramolecule | Name: Coronin-1B / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Supramolecule #4: Cofilin-1
| Supramolecule | Name: Cofilin-1 / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #1 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Macromolecule #1: Cofilin-1
| Macromolecule | Name: Cofilin-1 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / 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 #2: Coronin-1B,Methylated-DNA--protein-cysteine methyltransferase
| Macromolecule | Name: Coronin-1B,Methylated-DNA--protein-cysteine methyltransferase type: protein_or_peptide / ID: 2 / Details: Coronin-1B,Coronin-1B / Number of copies: 5 / Enantiomer: LEVO EC number: methylated-DNA-[protein]-cysteine S-methyltransferase |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 74.788086 KDa |
| Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
| Sequence | String: GAMGSMSFRK VVRQSKFRHV FGQPVKNDQC YEDIRVSRVT WDSTFCAVNP KFLAVIVEAS GGGAFLVLPL SKTGRIDKAY PTVCGHTGP VLDIDWCPHN DEVIASGSED CTVMVWQIPE NGLTSPLTEP VVVLEGHTKR VGIIAWHPTA RNVLLSAGCD N VVLIWNVG ...String: GAMGSMSFRK VVRQSKFRHV FGQPVKNDQC YEDIRVSRVT WDSTFCAVNP KFLAVIVEAS GGGAFLVLPL SKTGRIDKAY PTVCGHTGP VLDIDWCPHN DEVIASGSED CTVMVWQIPE NGLTSPLTEP VVVLEGHTKR VGIIAWHPTA RNVLLSAGCD N VVLIWNVG TAEELYRLDS LHPDLIYNVS WNHNGSLFCS ACKDKSVRII DPRRGTLVAE REKAHEGARP MRAIFLADGK VF TTGFSRM SERQLALWDP ENLEEPMALQ ELDSSNGALL PFYDPDTSVV YVCGKGDSSI RYFEITEEPP YIHFLNTFTS KEP QRGMGS MPKRGLEVSK CEIARFYKLH ERKCEPIVMT VPRKSDLFQD DLYPDTAGPE AALEAEEWVS GRDADPILIS LREA YVPSK QRDLKISRRN VLSDSRPAMA PGSSHLGAPA STTTAADATP SGSLARAGEA GKLEEVMQEL RALRALVKEQ GDRIC RLEE QLGRMENGDA GTGGGGSGGG GSMDKDCEMK RTTLDSPLGK LELSGCEQGL HEIKLLGKGT SAADAVEVPA PAAVLG GPE PLMQATAWLN AYFHQPEAIE EFPVPALHHP VFQQESFTRQ VLWKLLKVVK FGEVISYQQL AALAGNPAAT AAVKTAL SG NPVPILIPCH RVVSSSGAVG GYEGGLAVKE WLLAHEGHRL GKPGLG UniProtKB: Coronin-1B, Methylated-DNA--protein-cysteine methyltransferase |
-Macromolecule #3: Actin, cytoplasmic 1, N-terminally processed
| Macromolecule | Name: Actin, cytoplasmic 1, N-terminally processed / type: protein_or_peptide / ID: 3 / Details: Actin filament / Number of copies: 7 / 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 #4: ADENOSINE-5'-DIPHOSPHATE
| Macromolecule | Name: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 4 / Number of copies: 7 / Formula: ADP |
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| Molecular weight | Theoretical: 427.201 Da |
| Chemical component information | ![]() ChemComp-ADP: |
-Macromolecule #5: MAGNESIUM ION
| Macromolecule | Name: MAGNESIUM ION / type: ligand / ID: 5 / Number of copies: 7 / Formula: MG |
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| Molecular weight | Theoretical: 24.305 Da |
-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, 0.02% Tween20). | |||||||||||||||||||||
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| Grid | Model: Quantifoil R2/1 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 90 sec. | |||||||||||||||||||||
| 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: The used Titan Krios G2 microscope contains 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: 14055 / Average electron dose: 65.8 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 / Nominal magnification: 105000 |
| 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 | PDB ID: Chain - Source name: PDB / Chain - Initial model type: experimental model |
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| Details | Phenix real space refinement. |
| Refinement | Space: REAL / Protocol: FLEXIBLE FIT |
| Output model | ![]() PDB-9qfg: |
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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

