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- EMDB-41272: Catalytic and non-catalytic mechanisms of histone H4 lysine 20 me... -

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Basic information

Entry
Database: EMDB / ID: EMD-41272
TitleCatalytic and non-catalytic mechanisms of histone H4 lysine 20 methyltransferase SUV420H1
Map dataCryo-EM map of H2A.Z nucleosome
Sample
  • Complex: SUV420H1-H2A.Z nucleosome complex
    • Protein or peptide: Histone H2A.Z
    • Protein or peptide: Histone H3.2
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2B 1.1
    • DNA: DNA (146-MER)
    • DNA: DNA (145-MER)
KeywordsChromatin / Histone H4 modification / Methyltransferase / GENE REGULATION / GENE REGULATION-DNA complex
Function / homology
Function and homology information


nucleosomal DNA binding / RNA polymerase II core promoter sequence-specific DNA binding / heterochromatin / cellular response to estradiol stimulus / euchromatin / chromatin DNA binding / structural constituent of chromatin / nucleosome / chromatin organization / RNA polymerase II cis-regulatory region sequence-specific DNA binding ...nucleosomal DNA binding / RNA polymerase II core promoter sequence-specific DNA binding / heterochromatin / cellular response to estradiol stimulus / euchromatin / chromatin DNA binding / structural constituent of chromatin / nucleosome / chromatin organization / RNA polymerase II cis-regulatory region sequence-specific DNA binding / Amyloid fiber formation / protein heterodimerization activity / positive regulation of transcription by RNA polymerase II / DNA binding / extracellular exosome / nucleoplasm / nucleus
Similarity search - Function
Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A conserved site / Histone H2A signature. / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone H2A / Histone 2A / Histone H4, conserved site ...Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A conserved site / Histone H2A signature. / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone H2A / Histone 2A / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / 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
Histone H4 / Histone H2B 1.1 / Histone H2A.Z / Histone H3.2
Similarity search - Component
Biological speciesXenopus laevis (African clawed frog) / Homo sapiens (human) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsAbini-Agbomson S / Armache K-J
Funding support United States, 4 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM115882 United States
The Mark Foundation United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)5T32GM088118 United States
National Institutes of Health/National Cancer Institute (NIH/NCI)R01CA266978 United States
CitationJournal: Mol Cell / Year: 2023
Title: Catalytic and non-catalytic mechanisms of histone H4 lysine 20 methyltransferase SUV420H1.
Authors: Stephen Abini-Agbomson / Kristjan Gretarsson / Rochelle M Shih / Laura Hsieh / Tracy Lou / Pablo De Ioannes / Nikita Vasilyev / Rachel Lee / Miao Wang / Matthew D Simon / Jean-Paul Armache / ...Authors: Stephen Abini-Agbomson / Kristjan Gretarsson / Rochelle M Shih / Laura Hsieh / Tracy Lou / Pablo De Ioannes / Nikita Vasilyev / Rachel Lee / Miao Wang / Matthew D Simon / Jean-Paul Armache / Evgeny Nudler / Geeta Narlikar / Shixin Liu / Chao Lu / Karim-Jean Armache /
Abstract: SUV420H1 di- and tri-methylates histone H4 lysine 20 (H4K20me2/H4K20me3) and plays crucial roles in DNA replication, repair, and heterochromatin formation. It is dysregulated in several cancers. Many ...SUV420H1 di- and tri-methylates histone H4 lysine 20 (H4K20me2/H4K20me3) and plays crucial roles in DNA replication, repair, and heterochromatin formation. It is dysregulated in several cancers. Many of these processes were linked to its catalytic activity. However, deletion and inhibition of SUV420H1 have shown distinct phenotypes, suggesting that the enzyme likely has uncharacterized non-catalytic activities. Our cryoelectron microscopy (cryo-EM), biochemical, biophysical, and cellular analyses reveal how SUV420H1 recognizes its nucleosome substrates, and how histone variant H2A.Z stimulates its catalytic activity. SUV420H1 binding to nucleosomes causes a dramatic detachment of nucleosomal DNA from the histone octamer, which is a non-catalytic activity. We hypothesize that this regulates the accessibility of large macromolecular complexes to chromatin. We show that SUV420H1 can promote chromatin condensation, another non-catalytic activity that we speculate is needed for its heterochromatin functions. Together, our studies uncover and characterize the catalytic and non-catalytic mechanisms of SUV420H1, a key histone methyltransferase that plays an essential role in genomic stability.
History
DepositionJul 18, 2023-
Header (metadata) releaseSep 6, 2023-
Map releaseSep 6, 2023-
UpdateSep 6, 2023-
Current statusSep 6, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_41272.png

Downloads & links

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Map

FileDownload / File: emd_41272.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM map of H2A.Z nucleosome
Voxel sizeX=Y=Z: 0.852 Å
Density
Contour LevelBy AUTHOR: 0.26
Minimum - Maximum0.0 - 0.90455353
Average (Standard dev.)0.0035291326 (±0.028538981)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 272.64 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Cryo-EM half map of H2A.Z nucleosome

Fileemd_41272_half_map_1.map
AnnotationCryo-EM half map of H2A.Z nucleosome
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Cryo-EM half map of H2A.Z nucleosome

Fileemd_41272_half_map_2.map
AnnotationCryo-EM half map of H2A.Z nucleosome
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : SUV420H1-H2A.Z nucleosome complex

EntireName: SUV420H1-H2A.Z nucleosome complex
Components
  • Complex: SUV420H1-H2A.Z nucleosome complex
    • Protein or peptide: Histone H2A.Z
    • Protein or peptide: Histone H3.2
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2B 1.1
    • DNA: DNA (146-MER)
    • DNA: DNA (145-MER)

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Supramolecule #1: SUV420H1-H2A.Z nucleosome complex

SupramoleculeName: SUV420H1-H2A.Z nucleosome complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4, #6, #5
Source (natural)Organism: Xenopus laevis (African clawed frog)

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Macromolecule #1: Histone H2A.Z

MacromoleculeName: Histone H2A.Z / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.581796 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
MAGGKAGKDS GKAKTKAVSR SQRAGLQFPV GRIHRHLKSR TTSHGRVGAT AAVYSAAILE YLTAEVLELA GNASKDLKVK RITPRHLQL AIRGDEELDS LIKATIAGGG VIPHIHKSLI GKKGQQKTV

UniProtKB: Histone H2A.Z

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Macromolecule #2: Histone H3.2

MacromoleculeName: Histone H3.2 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 15.30393 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
ARTKQTARKS TGGKAPRKQL ATKAARKSAP ATGGVKKPHR YRPGTVALRE IRRYQKSTEL LIRKLPFQRL VREIAQDFKT DLRFQSSAV MALQEASEAY LVALFEDTNL CAIHAKRVTI MPKDIQLARR IRGERA

UniProtKB: Histone H3.2

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Macromolecule #3: Histone H4

MacromoleculeName: Histone H4 / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 11.394426 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
MSGRGKGGKG LGKGGAKRHR KVLRDNIQGI TKPAIRRLAR RGGVKRISGL IYEETRGVLK VFLENVIRDA VTYTEHAKRK TVTAMDVVY ALKRQGRTLY GFGG

UniProtKB: Histone H4

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Macromolecule #4: Histone H2B 1.1

MacromoleculeName: Histone H2B 1.1 / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 13.655948 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
MAKSAPAPKK GSKKAVTKTQ KKDGKKRRKT RKESYAIYVY KVLKQVHPDT GISSKAMSIM NSFVNDVFER IAGEASRLAH YNKRSTITS REIQTAVRLL LPGELAKHAV SEGTKAVTKY TSAK

UniProtKB: Histone H2B 1.1

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Macromolecule #5: DNA (145-MER)

MacromoleculeName: DNA (145-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 44.82457 KDa
SequenceString: (DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC) ...String:
(DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC)(DT)(DA) (DG)(DC)(DA)(DC)(DC)(DG)(DC)(DT)(DT)(DA) (DA)(DA) (DC)(DG)(DC)(DA)(DC)(DG)(DT) (DA)(DC)(DG)(DG)(DA)(DT)(DT)(DC)(DT)(DC) (DC)(DC)(DC) (DC)(DG)(DC)(DG)(DT)(DT) (DT)(DT)(DA)(DA)(DC)(DC)(DG)(DC)(DC)(DA) (DA)(DG)(DG)(DG) (DG)(DA)(DT)(DT)(DA) (DC)(DT)(DC)(DC)(DC)(DT)(DA)(DG)(DT)(DC) (DT)(DC)(DC)(DA)(DG) (DG)(DC)(DA)(DC) (DG)(DT)(DG)(DT)(DC)(DA)(DG)(DA)(DT)(DA) (DT)(DA)(DT)(DA)(DC)(DA) (DT)(DC)(DC) (DG)(DA)(DT)

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Macromolecule #6: DNA (146-MER)

MacromoleculeName: DNA (146-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 45.304863 KDa
SequenceString: (DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG) (DG)(DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG) (DA) (DG)(DT)(DA)(DA)(DT)(DC) ...String:
(DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG) (DG)(DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG) (DA) (DG)(DT)(DA)(DA)(DT)(DC)(DC)(DC) (DC)(DT)(DT)(DG)(DG)(DC)(DG)(DG)(DT)(DT) (DA)(DA) (DA)(DA)(DC)(DG)(DC)(DG)(DG) (DG)(DG)(DG)(DA)(DG)(DA)(DA)(DT)(DC)(DC) (DG)(DT)(DA) (DC)(DG)(DT)(DG)(DC)(DG) (DT)(DT)(DT)(DA)(DA)(DG)(DC)(DG)(DG)(DT) (DG)(DC)(DT)(DA) (DG)(DA)(DG)(DC)(DT) (DG)(DT)(DC)(DT)(DA)(DC)(DG)(DA)(DC)(DC) (DA)(DA)(DT)(DT)(DG) (DA)(DG)(DC)(DG) (DG)(DC)(DC)(DT)(DC)(DG)(DG)(DC)(DA)(DC) (DC)(DG)(DG)(DG)(DA)(DT) (DT)(DC)(DT) (DC)(DG)(DA)

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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

Concentration0.3 mg/mL
BufferpH: 7.9
Component:
ConcentrationFormulaName
100.0 mMNaClSodium chlorideSodium chloride
50.0 mMC8H18N2O4SHEPES
2.0 mMC4H10O2S2DTT

Details: 50 mM HEPES pH 7.9, 100 mM NaCl, 2 mM DTT
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.4 µm / Nominal defocus min: 1.0 µm
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Initial angle assignmentType: OTHER
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 206872

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