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- EMDB-41135: Cryo-EM structure of Cortactin-bound to Arp2/3 complex -

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Entry
Database: EMDB / ID: EMD-41135
TitleCryo-EM structure of Cortactin-bound to Arp2/3 complex
Map data
Sample
  • Complex: Cortactin NTA bound to Arp2/3 complex
    • Protein or peptide: Actin-related protein 3
    • Protein or peptide: Actin-related protein 2
    • Protein or peptide: Actin-related protein 2/3 complex subunit 1A
    • Protein or peptide: Actin-related protein 2/3 complex subunit 2
    • Protein or peptide: Actin-related protein 2/3 complex subunit 3
    • Protein or peptide: Actin-related protein 2/3 complex subunit 4
    • Protein or peptide: Actin-related protein 2/3 complex subunit 5
    • Protein or peptide: Src substrate cortactin
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE
KeywordsComplex / migration / actin / cytoskeleton / CONTRACTILE PROTEIN
Function / homology
Function and homology information


lamellipodium organization / EPHB-mediated forward signaling / site of polarized growth / Regulation of actin dynamics for phagocytic cup formation / RHO GTPases Activate WASPs and WAVEs / Arp2/3 protein complex / Arp2/3 complex-mediated actin nucleation / Arp2/3 complex binding / modification of postsynaptic actin cytoskeleton / modification of postsynaptic structure ...lamellipodium organization / EPHB-mediated forward signaling / site of polarized growth / Regulation of actin dynamics for phagocytic cup formation / RHO GTPases Activate WASPs and WAVEs / Arp2/3 protein complex / Arp2/3 complex-mediated actin nucleation / Arp2/3 complex binding / modification of postsynaptic actin cytoskeleton / modification of postsynaptic structure / mitotic spindle midzone / regulation of cell projection assembly / regulation of mitophagy / postsynaptic actin cytoskeleton / profilin binding / positive regulation of smooth muscle contraction / regulation of actin filament polymerization / positive regulation of chemotaxis / Clathrin-mediated endocytosis / substrate-dependent cell migration, cell extension / focal adhesion assembly / podosome / proline-rich region binding / dendritic spine maintenance / Neutrophil degranulation / regulation of axon extension / cortical actin cytoskeleton / cortical cytoskeleton / positive regulation of actin filament polymerization / positive regulation of double-strand break repair via homologous recombination / cilium assembly / positive regulation of lamellipodium assembly / extrinsic apoptotic signaling pathway / clathrin-coated pit / voltage-gated potassium channel complex / ruffle / actin filament polymerization / neuron projection morphogenesis / receptor-mediated endocytosis / cell projection / cell motility / actin filament / negative regulation of extrinsic apoptotic signaling pathway / intracellular protein transport / structural constituent of cytoskeleton / actin filament binding / cell migration / lamellipodium / cell junction / site of double-strand break / cell cortex / actin cytoskeleton organization / postsynapse / dendritic spine / neuron projection / focal adhesion / glutamatergic synapse / synapse / Golgi apparatus / endoplasmic reticulum / positive regulation of transcription by RNA polymerase II / ATP binding / nucleus / plasma membrane / cytoplasm / cytosol
Similarity search - Function
Hs1/Cortactin / Cortactin, SH3 domain / Repeat in HS1/Cortactin / Cortactin repeat profile. / Actin-related protein 2/3 complex subunit 5 / Actin-related protein 2/3 complex subunit 2 / Actin-related protein 2/3 complex subunit 3 / Actin-related protein 2/3 complex subunit 4 / Actin-related protein 2/3 complex subunit 1 / Arp2/3 complex subunit 2/4 ...Hs1/Cortactin / Cortactin, SH3 domain / Repeat in HS1/Cortactin / Cortactin repeat profile. / Actin-related protein 2/3 complex subunit 5 / Actin-related protein 2/3 complex subunit 2 / Actin-related protein 2/3 complex subunit 3 / Actin-related protein 2/3 complex subunit 4 / Actin-related protein 2/3 complex subunit 1 / Arp2/3 complex subunit 2/4 / Actin-related protein 2/3 complex subunit 5 superfamily / Actin-related protein 2/3 complex subunit 3 superfamily / Arp2/3 complex, 34 kD subunit p34-Arc / ARP2/3 complex ARPC3 (21 kDa) subunit / ARP2/3 complex 16 kDa subunit (p16-Arc) / ARP2/3 complex 20 kDa subunit (ARPC4) / Variant SH3 domain / Actin/actin-like conserved site / Actins and actin-related proteins signature. / Actin / Actin family / Actin / ATPase, nucleotide binding domain / Src homology 3 domains / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
Actin-related protein 2 / Actin-related protein 2/3 complex subunit 5 / Actin-related protein 3 / Actin-related protein 2/3 complex subunit 4 / Actin-related protein 2/3 complex subunit 1A / Actin-related protein 2/3 complex subunit 2 / Actin-related protein 2/3 complex subunit 3 / Src substrate cortactin
Similarity search - Component
Biological speciesBos taurus (cattle) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.89 Å
AuthorsFregoso FE / van Eeuwen T / Dominguez R
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM073791 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)F31 GM148048 United States
CitationJournal: Nat Commun / Year: 2023
Title: Mechanism of synergistic activation of Arp2/3 complex by cortactin and WASP-family proteins.
Authors: Fred E Fregoso / Malgorzata Boczkowska / Grzegorz Rebowski / Peter J Carman / Trevor van Eeuwen / Roberto Dominguez /
Abstract: Cortactin coactivates Arp2/3 complex synergistically with WASP-family nucleation-promoting factors (NPFs) and stabilizes branched networks by linking Arp2/3 complex to F-actin. It is poorly ...Cortactin coactivates Arp2/3 complex synergistically with WASP-family nucleation-promoting factors (NPFs) and stabilizes branched networks by linking Arp2/3 complex to F-actin. It is poorly understood how cortactin performs these functions. We describe the 2.89 Å resolution cryo-EM structure of cortactin's N-terminal domain (Cort) bound to Arp2/3 complex. Cortactin binds Arp2/3 complex through an inverted Acidic domain (D20-V29), which targets the same site on Arp3 as the Acidic domain of NPFs but with opposite polarity. Sequences N- and C-terminal to cortactin's Acidic domain do not increase its affinity for Arp2/3 complex but contribute toward coactivation with NPFs. Coactivation further increases with NPF dimerization and for longer cortactin constructs with stronger binding to F-actin. The results suggest that cortactin contributes to Arp2/3 complex coactivation with NPFs in two ways, by helping recruit the complex to F-actin and by stabilizing the short-pitch (active) conformation, which are both byproducts of cortactin's core function in branch stabilization.
History
DepositionJun 27, 2023-
Header (metadata) releaseSep 27, 2023-
Map releaseSep 27, 2023-
UpdateJan 31, 2024-
Current statusJan 31, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_41135.png

Downloads & links

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Map

FileDownload / File: emd_41135.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.84 Å
Density
Contour LevelBy AUTHOR: 0.0685
Minimum - Maximum-0.032913163 - 1.6580518
Average (Standard dev.)0.0017934644 (±0.030600723)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 251.99998 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_41135_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_41135_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Cortactin NTA bound to Arp2/3 complex

EntireName: Cortactin NTA bound to Arp2/3 complex
Components
  • Complex: Cortactin NTA bound to Arp2/3 complex
    • Protein or peptide: Actin-related protein 3
    • Protein or peptide: Actin-related protein 2
    • Protein or peptide: Actin-related protein 2/3 complex subunit 1A
    • Protein or peptide: Actin-related protein 2/3 complex subunit 2
    • Protein or peptide: Actin-related protein 2/3 complex subunit 3
    • Protein or peptide: Actin-related protein 2/3 complex subunit 4
    • Protein or peptide: Actin-related protein 2/3 complex subunit 5
    • Protein or peptide: Src substrate cortactin
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE

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Supramolecule #1: Cortactin NTA bound to Arp2/3 complex

SupramoleculeName: Cortactin NTA bound to Arp2/3 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#8
Source (natural)Organism: Bos taurus (cattle)
Molecular weightTheoretical: 223 KDa

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Macromolecule #1: Actin-related protein 3

MacromoleculeName: Actin-related protein 3 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle) / Organ: Brain
Molecular weightTheoretical: 47.428031 KDa
SequenceString: MAGRLPACVV DCGTGYTKLG YAGNTEPQFI IPSCIAIKES AKVGDQAQRR VMKGVDDLDF FIGDEAIEKP TYATKWPIRH GIVEDWDLM ERFMEQVIFK YLRAEPEDHY FLLTEPPLNT PENREYTAEI MFESFNVPGL YIAVQAVLAL AASWTSRQVG E RTLTGTVI ...String:
MAGRLPACVV DCGTGYTKLG YAGNTEPQFI IPSCIAIKES AKVGDQAQRR VMKGVDDLDF FIGDEAIEKP TYATKWPIRH GIVEDWDLM ERFMEQVIFK YLRAEPEDHY FLLTEPPLNT PENREYTAEI MFESFNVPGL YIAVQAVLAL AASWTSRQVG E RTLTGTVI DSGDGVTHVI PVAEGYVIGS CIKHIPIAGR DITYFIQQLL RDREVGIPPE QSLETAKAVK ERYSYVCPDL VK EFNKYDT DGSKWIKQYT GINAISKKEF SIDVGYERFL GPEIFFHPEF ANPDFTQPIS EVVDEVIQNC PIDVRRPLYK NIV LSGGST MFRDFGRRLQ RDLKRTVDAR LKLSEELSGG RLKPKPIDVQ VITHHMQRYA VWFGGSMLAS TPEFYQVCHT KKDY EEIGP SICRHNPVFG VMS

UniProtKB: Actin-related protein 3

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Macromolecule #2: Actin-related protein 2

MacromoleculeName: Actin-related protein 2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle) / Organ: Brain
Molecular weightTheoretical: 44.818711 KDa
SequenceString: MDSQGRKVVV CDNGTGFVKC GYAGSNFPEH IFPALVGRPI IRSTTKVGNI EIKDLMVGDE ASELRSMLEV NYPMENGIVR NWDDMKHLW DYTFGPEKLN IDTRNCKILL TEPPMNPTKN REKIVEVMFE TYQFSGVYVA IQAVLTLYAQ GLLTGVVVDS G DGVTHICP ...String:
MDSQGRKVVV CDNGTGFVKC GYAGSNFPEH IFPALVGRPI IRSTTKVGNI EIKDLMVGDE ASELRSMLEV NYPMENGIVR NWDDMKHLW DYTFGPEKLN IDTRNCKILL TEPPMNPTKN REKIVEVMFE TYQFSGVYVA IQAVLTLYAQ GLLTGVVVDS G DGVTHICP VYEGFSLPHL TRRLDIAGRD ITRYLIKLLL LRGYAFNHSA DFETVRMIKE KLCYVGYNIE QEQKLALETT VL VESYTLP DGRIIKVGGE RFEAPEALFQ PHLINVEGVG VAELLFNTIQ AADIDTRSEF YKHIVLSGGS TMYPGLPSRL ERE LKQLYL ERVLKGDVEK LSKFKIRIED PPRRKHMVFL GGAVLADIMK DKDNFWMTRQ EYQEKGVRVL EKLGVTVR

UniProtKB: Actin-related protein 2

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Macromolecule #3: Actin-related protein 2/3 complex subunit 1A

MacromoleculeName: Actin-related protein 2/3 complex subunit 1A / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle) / Organ: brain
Molecular weightTheoretical: 41.594238 KDa
SequenceString: MSLHQFLLEP ITCHAWNRDR TQIALSPNNH EVHIYKKNGG QWVKAHELKE HNGHITGIDW APKSDRIVTC GADRNAYVWS QKDGVWKPT LVILRINRAA TFVKWSPLEN KFAVGSGARL ISVCYFESEN DWWVSKHIKK PIRSTVLSLD WHPNNVLLAA G SCDFKCRV ...String:
MSLHQFLLEP ITCHAWNRDR TQIALSPNNH EVHIYKKNGG QWVKAHELKE HNGHITGIDW APKSDRIVTC GADRNAYVWS QKDGVWKPT LVILRINRAA TFVKWSPLEN KFAVGSGARL ISVCYFESEN DWWVSKHIKK PIRSTVLSLD WHPNNVLLAA G SCDFKCRV FSAYIKEVDE KPASTPWGSK MPFGQLMSEF GGSGTGGWVH GVSFSASGSR LAWVSHDSTV SVADASKSVQ VS TLKTEFL PLLSVSFVSE NSVVAAGHDC CPMLFNYDDR GCLTFVSKLD IPKQSIQRNM SAMERFRNMD KRATTEDRNT ALE TLHQNS ITQVSIYEVD KQDCRKFCTT GIDGAMTIWD FKTLESSIQG LRIM

UniProtKB: Actin-related protein 2/3 complex subunit 1A

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Macromolecule #4: Actin-related protein 2/3 complex subunit 2

MacromoleculeName: Actin-related protein 2/3 complex subunit 2 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle) / Organ: brain
Molecular weightTheoretical: 34.402043 KDa
SequenceString: MILLEVNNRI IEETLALKFE NAAAGNKPEA VEVTFADFDG VLYHISNPNG DKTKVMVSIS LKFYKELQAH GADELLKRVY GSYLVNPES GYNVSLLYDL ENLPASKDSI VHQAGMLKRN CFASVFEKYF QFQEEGKEGE NRAVIHYRDD ETMYVESKKD R VTVVFSTV ...String:
MILLEVNNRI IEETLALKFE NAAAGNKPEA VEVTFADFDG VLYHISNPNG DKTKVMVSIS LKFYKELQAH GADELLKRVY GSYLVNPES GYNVSLLYDL ENLPASKDSI VHQAGMLKRN CFASVFEKYF QFQEEGKEGE NRAVIHYRDD ETMYVESKKD R VTVVFSTV FKDDDDVVIG KVFMQEFKEG RRASHTAPQV LFSHREPPLE LKDTDAAVGD NIGYITFVLF PRHTNASARD NT INLIHTF RDYLHYHIKC SKAYIHTRMR AKTSDFLKVL NRARPDAEKK EMKTITGKTF SSR

UniProtKB: Actin-related protein 2/3 complex subunit 2

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Macromolecule #5: Actin-related protein 2/3 complex subunit 3

MacromoleculeName: Actin-related protein 2/3 complex subunit 3 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle) / Organ: brain
Molecular weightTheoretical: 20.572666 KDa
SequenceString:
MPAYHSSLMD PDTKLIGNMA LLPIRSQFKG PAPRETKDTD IVDEAIYYFK ANVFFKNYEI KNEADRTLIY ITLYISECLK KLQKCNSKS QGEKEMYTLG ITNFPIPGEP GFPLNAIYAK PANKQEDEVM RAYLQQLRQE TGLRLCEKVF DPQNDKPSKW W TCFVKRQF MNKSLSGPGQ

UniProtKB: Actin-related protein 2/3 complex subunit 3

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Macromolecule #6: Actin-related protein 2/3 complex subunit 4

MacromoleculeName: Actin-related protein 2/3 complex subunit 4 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle) / Organ: brain
Molecular weightTheoretical: 19.697047 KDa
SequenceString:
MTATLRPYLS AVRATLQAAL CLENFSSQVV ERHNKPEVEV RSSKELLLQP VTISRNEKEK VLIEGSINSV RVSIAVKQAD EIEKILCHK FMRFMMMRAE NFFILRRKPV EGYDISFLIT NFHTEQMYKH KLVDFVIHFM EEIDKEISEM KLSVNARARI V AEEFLKNF

UniProtKB: Actin-related protein 2/3 complex subunit 4

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Macromolecule #7: Actin-related protein 2/3 complex subunit 5

MacromoleculeName: Actin-related protein 2/3 complex subunit 5 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle) / Organ: brain
Molecular weightTheoretical: 16.309343 KDa
SequenceString:
MSKNTVSSAR FRKVDVDEYD ENKFVDEEDG GDGQAGPDEG EVDSCLRQGN MTAALQAALK NPPINTKSQA VKDRAGSIVL KVLISFKAN DIEKAVQSLD KNGVDLLMKY IYKGFESPSD NSSAVLLQWH EKALAAGGVG SIVRVLTARK TV

UniProtKB: Actin-related protein 2/3 complex subunit 5

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Macromolecule #8: Src substrate cortactin

MacromoleculeName: Src substrate cortactin / type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 8.684353 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MWKASAGHAV SITQDDGGAD DWETDPDFVN DVSEKEQRWG AKTVQGSGHQ EHINIHKLRE NVFQEHQTLK EKELET

UniProtKB: Src substrate cortactin

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Macromolecule #9: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 9 / Number of copies: 2 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #10: ADENOSINE-5'-TRIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 10 / Number of copies: 2 / Formula: ATP
Molecular weightTheoretical: 507.181 Da
Chemical component information

ChemComp-ATP:
ADENOSINE-5'-TRIPHOSPHATE / ATP, energy-carrying molecule*YM

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration2 mg/mL
BufferpH: 7
Component:
ConcentrationFormulaName
50.0 mMKClPotassium chloride
2.0 mMMgCl2Magnesium Chloride
1.0 mMEGTAethylene glycol-bis(beta-aminoethyl ether)-N,N,N,N-tetraacetic acid
10.0 mMIImidazole

Details: 10 mM imidazole pH 7.0, 50 mM KCl, 2 mM MgCl2, 1 mM EGTA
GridModel: Quantifoil R1.2/1.3 / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 120 sec.
VitrificationCryogen name: ETHANE
Detailsmonodisperse

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 41.6 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: OTHER / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1461919
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

1k8k


Details: The crystal structure of Arp2/3 complex at 2 angstrom resolution (PDB code: 1K8K) was used as the starting model for refinement of the Cort(1-76)-Arp2/3 complex structure. Multiple rounds of ...Details: The crystal structure of Arp2/3 complex at 2 angstrom resolution (PDB code: 1K8K) was used as the starting model for refinement of the Cort(1-76)-Arp2/3 complex structure. Multiple rounds of refinement using the program Phenix 49 and model building in Coot led to a final model with excellent stereochemical parameters, good map-to-model correlation, and a map-to-model FSC of 3.35 angstroms.
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.89 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 241506
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.0.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

1k8k


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementProtocol: RIGID BODY FIT
Output model

PDB-8tah:
Cryo-EM structure of Cortactin-bound to Arp2/3 complex

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