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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-10959 | |||||||||
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Title | Cryo-EM structure of the ARP2/3 1B5CL isoform complex. | |||||||||
![]() | cryo-EM structure of the ARP2/3 1B5CL isoform complex. | |||||||||
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![]() | Cytoskeleton / STRUCTURAL PROTEIN | |||||||||
Function / homology | ![]() tubulobulbar complex / meiotic chromosome movement towards spindle pole / cytosolic transport / growth cone leading edge / muscle cell projection membrane / meiotic cytokinesis / spindle localization / actin polymerization-dependent cell motility / Arp2/3 protein complex / asymmetric cell division ...tubulobulbar complex / meiotic chromosome movement towards spindle pole / cytosolic transport / growth cone leading edge / muscle cell projection membrane / meiotic cytokinesis / spindle localization / actin polymerization-dependent cell motility / Arp2/3 protein complex / asymmetric cell division / Arp2/3 complex-mediated actin nucleation / actin nucleation / actin cap / regulation of actin filament polymerization / establishment or maintenance of cell polarity / positive regulation of actin filament polymerization / filamentous actin / brush border / positive regulation of double-strand break repair via homologous recombination / cilium assembly / RHO GTPases Activate WASPs and WAVEs / positive regulation of lamellipodium assembly / positive regulation of substrate adhesion-dependent cell spreading / EPHB-mediated forward signaling / actin filament polymerization / cellular response to nerve growth factor stimulus / cell projection / FCGR3A-mediated phagocytosis / structural constituent of cytoskeleton / Regulation of actin dynamics for phagocytic cup formation / cellular response to type II interferon / actin filament binding / response to estrogen / azurophil granule lumen / cell-cell junction / Clathrin-mediated endocytosis / actin cytoskeleton / cell migration / lamellipodium / response to estradiol / site of double-strand break / actin binding / cell cortex / ficolin-1-rich granule lumen / endosome / neuron projection / focal adhesion / glutamatergic synapse / Neutrophil degranulation / protein-containing complex binding / enzyme binding / positive regulation of transcription by RNA polymerase II / extracellular exosome / extracellular region / nucleoplasm / ATP binding / membrane / nucleus / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.2 Å | |||||||||
![]() | von Loeffelholz O / Moores C | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM of human Arp2/3 complexes provides structural insights into actin nucleation modulation by ARPC5 isoforms. Authors: Ottilie von Loeffelholz / Andrew Purkiss / Luyan Cao / Svend Kjaer / Naoko Kogata / Guillaume Romet-Lemonne / Michael Way / Carolyn A Moores / ![]() ![]() Abstract: The Arp2/3 complex regulates many cellular processes by stimulating formation of branched actin filament networks. Because three of its seven subunits exist as two different isoforms, mammals produce ...The Arp2/3 complex regulates many cellular processes by stimulating formation of branched actin filament networks. Because three of its seven subunits exist as two different isoforms, mammals produce a family of Arp2/3 complexes with different properties that may be suited to different physiological contexts. To shed light on how isoform diversification affects Arp2/3 function, we determined a 4.2 Å resolution cryo-EM structure of the most active human Arp2/3 complex containing ARPC1B and ARPC5L, and compared it with the structure of the least active ARPC1A-ARPC5-containing complex. The architecture of each isoform-specific Arp2/3 complex is the same. Strikingly, however, the N-terminal half of ARPC5L is partially disordered compared to ARPC5, suggesting that this region of ARPC5/ARPC5L is an important determinant of complex activity. Confirming this idea, the nucleation activity of Arp2/3 complexes containing hybrid ARPC5/ARPC5L subunits is higher when the ARPC5L N-terminus is present, thereby providing insight into activity differences between the different Arp2/3 complexes. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 5.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 17.5 KB 17.5 KB | Display Display | ![]() |
Images | ![]() | 201.9 KB | ||
Filedesc metadata | ![]() | 6.6 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 218.4 KB | Display | ![]() |
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Full document | ![]() | 217.5 KB | Display | |
Data in XML | ![]() | 5.9 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6yw6MC ![]() 6yw7C M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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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 | cryo-EM structure of the ARP2/3 1B5CL isoform complex. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.06 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Arp2/3
Entire | Name: Arp2/3 |
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Components |
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-Supramolecule #1: Arp2/3
Supramolecule | Name: Arp2/3 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#7 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 250 kDa/nm |
-Macromolecule #1: Actin-related protein 3
Macromolecule | Name: Actin-related protein 3 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 47.428031 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: 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 |
-Macromolecule #2: ARPC1B
Macromolecule | Name: ARPC1B / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 41.004781 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MAYHSFLVEP ISCHAWNKDR TQIAICPNNH EVHIYEKSGA KWTKVHELKE HNGQVTGIDW APESNRIVTC GTDRNAYVWT LKGRTWKPT LVILRINRAA RCVRWAPNEN KFAVGSGSRV ISICYFEQEN DWWVCKHIKK PIRSTVLSLD WHPNNVLLAA G SCDFKCRI ...String: MAYHSFLVEP ISCHAWNKDR TQIAICPNNH EVHIYEKSGA KWTKVHELKE HNGQVTGIDW APESNRIVTC GTDRNAYVWT LKGRTWKPT LVILRINRAA RCVRWAPNEN KFAVGSGSRV ISICYFEQEN DWWVCKHIKK PIRSTVLSLD WHPNNVLLAA G SCDFKCRI FSAYIKEVEE RPAPTPWGSK MPFGELMFES SSSCGWVHGV CFSASGSRVA WVSHDSTVCL ADADKKMAVA TL ASETLPL LALTFITDNS LVAAGHDCFP VLFTYDAAAG MLSFGGRLDV PKQSSQRGLT ARERFQNLDK KASSEGGTAA GAG LDSLHK NSVSQISVLS GGKAKCSQFC TTGMDGGMSI WDVKSLESAL KDLKIK UniProtKB: Actin-related protein 2/3 complex subunit 1B |
-Macromolecule #3: Actin-related protein 2/3 complex subunit 2
Macromolecule | Name: Actin-related protein 2/3 complex subunit 2 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 34.386043 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MILLEVNNRI IEETLALKFE NAAAGNKPEA VEVTFADFDG VLYHISNPNG DKTKVMVSIS LKFYKELQAH GADELLKRVY GSFLVNPES GYNVSLLYDL ENLPASKDSI VHQAGMLKRN CFASVFEKYF QFQEEGKEGE NRAVIHYRDD ETMYVESKKD R VTVVFSTV ...String: MILLEVNNRI IEETLALKFE NAAAGNKPEA VEVTFADFDG VLYHISNPNG DKTKVMVSIS LKFYKELQAH GADELLKRVY GSFLVNPES 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 |
-Macromolecule #4: Actin-related protein 2/3 complex subunit 3
Macromolecule | Name: Actin-related protein 2/3 complex subunit 3 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 20.572666 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: 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 |
-Macromolecule #5: Actin-related protein 2
Macromolecule | Name: Actin-related protein 2 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 44.818711 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MDSQGRKVVV CDNGTGFVKC GYAGSNFPEH IFPAIVGRPI IRSTTKVGNI EIKDLMVGDE ASELRSMLEV NYPMENGIVR NWDDMKHLW DYTFGPEKLN IDTRNCKILL TEPPMNPTKN REKIVEVMFE TYQFSGVYVA IQAVLTLYAQ GLLTGVVVDS G DGVTHICP ...String: MDSQGRKVVV CDNGTGFVKC GYAGSNFPEH IFPAIVGRPI 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 |
-Macromolecule #6: Actin-related protein 2/3 complex subunit 5-like protein
Macromolecule | Name: Actin-related protein 2/3 complex subunit 5-like protein type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 16.96418 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MARNTLSSRF RRVDIDEFDE NKFVDEQEEA AAAAAEPGPD PSEVDGLLRQ GDMLRAFHAA LRNSPVNTKN QAVKERAQGV VLKVLTNFK SSEIEQAVQS LDRNGVDLLM KYIYKGFEKP TENSSAVLLQ WHEKALAVGG LGSIIRVLTA RKTV UniProtKB: Actin-related protein 2/3 complex subunit 5-like protein |
-Macromolecule #7: Actin-related protein 2/3 complex subunit 4
Macromolecule | Name: Actin-related protein 2/3 complex subunit 4 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 19.697047 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: 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 |
-Macromolecule #8: ADENOSINE-5'-TRIPHOSPHATE
Macromolecule | Name: ADENOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 8 / Number of copies: 2 / Formula: ATP |
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Molecular weight | Theoretical: 507.181 Da |
Chemical component information | ![]() ChemComp-ATP: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.25 mg/mL |
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Buffer | pH: 7 |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: PDB ENTRY PDB model - PDB ID: |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 101606 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |