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- PDB-9dg3: ncPRC1RYBP Delta-linker mutant bound to singly modified H2AK119Ub... -

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Basic information

Entry
Database: PDB / ID: 9dg3
TitlencPRC1RYBP Delta-linker mutant bound to singly modified H2AK119Ub nucleosome
Components
  • (DNA (187-MER)) x 2
  • (Histone H2A type ...) x 2
  • Histone H2B 1.1
  • Histone H3.2
  • Histone H4
  • RING1 and YY1-binding protein
  • Ubiquitin
KeywordsNUCLEAR PROTEIN/DNA / DNA complex protein / structural protein / NUCLEAR PROTEIN-DNA complex
Function / homology
Function and homology information


PcG protein complex / symbiont entry into host cell via disruption of host cell glycocalyx / symbiont entry into host cell via disruption of host cell envelope / virus tail / RUNX1 interacts with co-factors whose precise effect on RUNX1 targets is not known / Transcriptional Regulation by E2F6 / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / transcription coregulator activity / transcription corepressor activity / structural constituent of chromatin ...PcG protein complex / symbiont entry into host cell via disruption of host cell glycocalyx / symbiont entry into host cell via disruption of host cell envelope / virus tail / RUNX1 interacts with co-factors whose precise effect on RUNX1 targets is not known / Transcriptional Regulation by E2F6 / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / transcription coregulator activity / transcription corepressor activity / structural constituent of chromatin / nucleosome / heterochromatin formation / nucleosome assembly / nucleic acid binding / positive regulation of apoptotic process / chromatin remodeling / protein heterodimerization activity / apoptotic process / regulation of DNA-templated transcription / positive regulation of DNA-templated transcription / negative regulation of transcription by RNA polymerase II / DNA binding / zinc ion binding / nucleoplasm / nucleus / cytoplasm
Similarity search - Function
Yaf2/RYBP C-terminal binding motif / RING1 and YY1-binding protein/YY1-associated factor 2 / Yaf2/RYBP C-terminal binding motif / Zinc finger domain / Zn-finger in Ran binding protein and others / Pectate lyase superfamily protein / Rhamnogalacturonase A/epimerase, pectate lyase-like / Zinc finger RanBP2 type profile. / Zinc finger, RanBP2-type superfamily / Zinc finger RanBP2-type signature. ...Yaf2/RYBP C-terminal binding motif / RING1 and YY1-binding protein/YY1-associated factor 2 / Yaf2/RYBP C-terminal binding motif / Zinc finger domain / Zn-finger in Ran binding protein and others / Pectate lyase superfamily protein / Rhamnogalacturonase A/epimerase, pectate lyase-like / Zinc finger RanBP2 type profile. / Zinc finger, RanBP2-type superfamily / Zinc finger RanBP2-type signature. / Zinc finger, RanBP2-type / Pectin lyase fold / Pectin lyase fold/virulence factor / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 / Histone-fold
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA (> 100) / Histone H2B 1.1 / Histone H2A type 1 / Tail fiber / Histone H4 / Histone H3.2 / RING1 and YY1-binding protein
Similarity search - Component
Biological speciesXenopus laevis (African clawed frog)
synthetic construct (others)
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.46 Å
AuthorsGodinez-Lopez, V. / Valencia-Sanchez, M.I. / Armache, J.P. / Armache, K.-J.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM115882 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01CA266978 United States
The Mark Foundation United States
CitationJournal: Nature / Year: 2024
Title: Read-write mechanisms of H2A ubiquitination by Polycomb repressive complex 1.
Authors: Victoria Godínez López / Marco Igor Valencia-Sánchez / Stephen Abini-Agbomson / Jonathan F Thomas / Rachel Lee / Pablo De Ioannes / Brian A Sosa / Jean-Paul Armache / Karim-Jean Armache /
Abstract: Epigenetic inheritance of silent chromatin domains is fundamental to cellular memory during embryogenesis, but it must overcome the dilution of repressive histone modifications during DNA replication. ...Epigenetic inheritance of silent chromatin domains is fundamental to cellular memory during embryogenesis, but it must overcome the dilution of repressive histone modifications during DNA replication. One such modification, histone H2A lysine 119 monoubiquitination (H2AK119Ub), needs to be re-established by the Polycomb repressive complex 1 (PRC1) E3 ligase to restore the silent Polycomb domain. However, the exact mechanism behind this restoration remains unknown. Here, combining cryo-electron microscopy (cryo-EM) and functional approaches, we characterize the read-write mechanism of the non-canonical PRC1-containing RYBP (ncPRC1). This mechanism, which functions as a positive-feedback loop in epigenetic regulation, emphasizes the pivotal role of ncPRC1 in restoring H2AK119Ub. We observe an asymmetrical binding of ncPRC1 to H2AK119Ub nucleosomes, guided in part by the N-terminal zinc-finger domain of RYBP binding to residual H2AK119Ub on nascent chromatin. This recognition positions the RING domains of RING1B and BMI1 on the unmodified nucleosome side, enabling recruitment of the E2 enzyme to ubiquitinate H2AK119 within the same nucleosome (intra-nucleosome read-write) or across nucleosomes (inter-nucleosome read-write). Collectively, our findings provide key structural and mechanistic insights into the dynamic interplay of epigenetic regulation, highlighting the significance of ncPRC1 in H2AK119Ub restoration to sustain repressive chromatin domains.
History
DepositionSep 1, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 20, 2024Provider: repository / Type: Initial release
Revision 1.1Jan 15, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Histone H3.2
B: Histone H4
C: Histone H2A type 1
D: Histone H2B 1.1
E: Histone H3.2
F: Histone H4
G: Histone H2A type 1
H: Histone H2B 1.1
I: DNA (187-MER)
J: DNA (187-MER)
M: RING1 and YY1-binding protein
N: Ubiquitin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)258,80213
Polymers258,73712
Non-polymers651
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Protein , 5 types, 8 molecules AEBFDHMN

#1: Protein Histone H3.2 / Histone H3


Mass: 15435.126 Da / Num. of mol.: 2 / Mutation: G103A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P84233
#2: Protein Histone H4


Mass: 11394.426 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P62799
#4: Protein Histone H2B 1.1 / H2B1.1


Mass: 13979.291 Da / Num. of mol.: 2 / Mutation: S33T
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P02281
#8: Protein RING1 and YY1-binding protein / Apoptin-associating protein 1 / APAP-1 / Death effector domain-associated factor / DED-associated ...Apoptin-associating protein 1 / APAP-1 / Death effector domain-associated factor / DED-associated factor / YY1 and E4TF1-associated factor 1


Mass: 24863.625 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RYBP, DEDAF, YEAF1 / Production host: Escherichia coli (E. coli) / References: UniProt: Q8N488
#9: Protein Ubiquitin


Mass: 8622.922 Da / Num. of mol.: 1 / Mutation: G76C
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: UBB / Production host: Escherichia coli (E. coli) / References: UniProt: P0CG47

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Histone H2A type ... , 2 types, 2 molecules CG

#3: Protein Histone H2A type 1


Mass: 14093.436 Da / Num. of mol.: 1 / Mutation: G100R
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P06897
#5: Protein Histone H2A type 1


Mass: 14067.398 Da / Num. of mol.: 1 / Mutation: G100R, K119C
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P06897

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DNA chain , 2 types, 2 molecules IJ

#6: DNA chain DNA (187-MER)


Mass: 57982.918 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)
#7: DNA chain DNA (187-MER)


Mass: 57488.551 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)

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Non-polymers , 1 types, 1 molecules

#10: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn

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Details

Has ligand of interestN
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: ncPRC1RYBP Delta-linker mutant bound to singly modified H2AK119Ub nucleosome
Type: COMPLEX / Entity ID: #1-#9 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 3500 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 49.6 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of real images: 3292

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Processing

EM software
IDNameCategory
2Leginonimage acquisition
10cryoSPARCfinal Euler assignment
11cryoSPARCclassification
12cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 1127632
3D reconstructionResolution: 3.46 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 23464 / Symmetry type: POINT
Atomic model building
IDPDB-ID 3D fitting-IDAccession codeInitial refinement model-IDSource nameType
13TU4

3tu4

13TU41PDBexperimental model
28H1T

8h1t

18H1T2PDBexperimental model
38SVF

8svf

18SVF3PDBexperimental model
42D9G

2d9g

12D9G4PDBexperimental model
51UBQ

1ubq

11UBQ5PDBexperimental model
62WWZ

2wwz

12WWZ6PDBexperimental model

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