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- EMDB-78881: Cofilactin filament -

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Basic information

Entry
Database: EMDB / ID: EMD-78881
TitleCofilactin filament
Map dataConsensus map for cofilactin filament.
Sample
  • Complex: Cofilactin filament
    • Protein or peptide: Actin, alpha skeletal muscle
    • Protein or peptide: Cofilin
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: water
Keywordsactin / cofilin / STRUCTURAL PROTEIN
Function / homology
Function and homology information


cytoskeletal motor activator activity / myosin heavy chain binding / tropomyosin binding / actin filament bundle / troponin I binding / filamentous actin / mesenchyme migration / skeletal muscle myofibril / striated muscle thin filament / skeletal muscle thin filament assembly ...cytoskeletal motor activator activity / myosin heavy chain binding / tropomyosin binding / actin filament bundle / troponin I binding / filamentous actin / mesenchyme migration / skeletal muscle myofibril / striated muscle thin filament / skeletal muscle thin filament assembly / actin filament bundle assembly / actin monomer binding / skeletal muscle fiber development / actin filament polymerization / stress fiber / titin binding / filopodium / actin filament / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / calcium-dependent protein binding / lamellipodium / cell body / protein domain specific binding / hydrolase activity / positive regulation of gene expression / calcium ion binding / magnesium ion binding / ATP binding / identical protein binding / cytoplasm
Similarity search - Function
Actins signature 1. / Actin, conserved site / Actins signature 2. / Actin/actin-like conserved site / Actins and actin-related proteins signature. / Actin / Actin family / Actin / ATPase, nucleotide binding domain
Similarity search - Domain/homology
Actin, alpha skeletal muscle
Similarity search - Component
Biological speciesCaenorhabditis elegans (invertebrata) / Oryctolagus cuniculus (rabbit)
Methodhelical reconstruction / cryo EM / Resolution: 1.99 Å
AuthorsStukey GJ / Dominguez R
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35 GM161161 United States
CitationJournal: To Be Published
Title: AIP1 Promotes Severing of Cofilin-Decorated Actin Filaments by Creating a Stress-Sensitive Rigid-Compliant Boundary
Authors: Stukey GJ / Geng S / Palmer NJ / Saks A / Vavylonis D / Ono S / Dominguez R
History
DepositionAug 31, 2026-
Header (metadata) releaseSep 9, 2026-
Map releaseSep 9, 2026-
UpdateSep 9, 2026-
Current statusSep 9, 2026Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_78881.png

Downloads & links

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Map

FileDownload / File: emd_78881.map.gz / Format: CCP4 / Size: 2.7 GB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationConsensus map for cofilactin filament.
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.37 Å/pix.
x 900 pix.
= 328.5 Å		0.37 Å/pix.
x 900 pix.
= 328.5 Å		0.37 Å/pix.
x 900 pix.
= 328.5 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.365 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0194
Minimum - Maximum-0.013274321 - 0.09803473
Average (Standard dev.)0.00032911883 (±0.0023858268)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions900900900
Spacing900900900
CellA=B=C: 328.5 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Half map B for cofilactin filament.

Fileemd_78881_half_map_1.map
AnnotationHalf map B for cofilactin filament.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map A for cofilactin filament.

Fileemd_78881_half_map_2.map
AnnotationHalf map A for cofilactin filament.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Cofilactin filament

EntireName: Cofilactin filament
Components
  • Complex: Cofilactin filament
    • Protein or peptide: Actin, alpha skeletal muscle
    • Protein or peptide: Cofilin
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: water

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Supramolecule #1: Cofilactin filament

SupramoleculeName: Cofilactin filament / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Caenorhabditis elegans (invertebrata)

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Macromolecule #1: Actin, alpha skeletal muscle

MacromoleculeName: Actin, alpha skeletal muscle / type: protein_or_peptide / ID: 1 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: Oryctolagus cuniculus (rabbit)
Molecular weightTheoretical: 42.096953 KDa
SequenceString: MCDEDETTAL VCDNGSGLVK AGFAGDDAPR AVFPSIVGRP RHQGVMVGMG QKDSYVGDEA QSKRGILTLK YPIEHGIITN WDDMEKIWH HTFYNELRVA PEEHPTLLTE APLNPKANRE KMTQIMFETF NVPAMYVAIQ AVLSLYASGR TTGIVLDSGD G VTHNVPIY ...String:
MCDEDETTAL VCDNGSGLVK AGFAGDDAPR AVFPSIVGRP RHQGVMVGMG QKDSYVGDEA QSKRGILTLK YPIEHGIITN WDDMEKIWH HTFYNELRVA PEEHPTLLTE APLNPKANRE KMTQIMFETF NVPAMYVAIQ AVLSLYASGR TTGIVLDSGD G VTHNVPIY EGYALPHAIM RLDLAGRDLT DYLMKILTER GYSFVTTAER EIVRDIKEKL CYVALDFENE MATAASSSSL EK SYELPDG QVITIGNERF RCPETLFQPS FIGMESAGIH ETTYNSIMKC DIDIRKDLYA NNVMSGGTTM YPGIADRMQK EIT ALAPST MKIKIIAPPE RKYSVWIGGS ILASLSTFQQ MWITKQEYDE AGPSIVHRKC F

UniProtKB: Actin, alpha skeletal muscle

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Macromolecule #2: Cofilin

MacromoleculeName: Cofilin / type: protein_or_peptide / ID: 2 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: Caenorhabditis elegans (invertebrata)
Molecular weightTheoretical: 17.070465 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
MASGVKVDPS CKNAYDLLHN KHQHSYIIFK IDKNDTAIVV EKVGEKNAPY AEFVEEMKKL VEDGKECRYA AVDVEVTVQR QGAEGTSTL NKVIFVQYCP DNAPVRRRML YASSVRALKA SLGLESLFQV QASEMSDLDE KSVKSDLMSN QRI

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Macromolecule #3: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 3 / Number of copies: 5 / Formula: ADP
Molecular weightTheoretical: 427.201 Da
Chemical component information

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM

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Macromolecule #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 5 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #5: water

MacromoleculeName: water / type: ligand / ID: 5 / Number of copies: 405 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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Experimental details

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Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statefilament

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: TFS FALCON 4i (4k x 4k) / Average electron dose: 51.71 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.7 µm / Nominal defocus min: 0.5 µm / Nominal magnification: 165000
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Helical parameters - Δz: 27.6 Å
Applied symmetry - Helical parameters - Δ&Phi: -162 °
Applied symmetry - Helical parameters - Axial symmetry: C6 (6 fold cyclic)
Resolution.type: BY AUTHOR / Resolution: 1.99 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.7) / Number images used: 1490092
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final angle assignmentType: NOT APPLICABLE
FSC plot (resolution estimation)

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