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Entry
Database: PDB / ID: 8t9h
TitleCatalytic and non-catalytic mechanisms of histone H4 lysine 20 methyltransferase SUV420H1
Components
  • (DNA (146-MER)) x 2
  • Histone H2A
  • Histone H2B 1.1
  • Histone H3.2
  • Histone H4
  • Histone-lysine N-methyltransferase KMT5B
KeywordsGENE REGULATION / Chromatin / Histone H4 modification / Methyltransferase
Function / homology
Function and homology information


[histone H4]-N-methyl-L-lysine20 N-methyltransferase / histone H4K20me methyltransferase activity / [histone H4]-lysine20 N-methyltransferase / histone H4K20 monomethyltransferase activity / histone H4K20 methyltransferase activity / histone H4 methyltransferase activity / positive regulation of isotype switching / condensed chromosome, centromeric region / S-adenosyl-L-methionine binding / muscle organ development ...[histone H4]-N-methyl-L-lysine20 N-methyltransferase / histone H4K20me methyltransferase activity / [histone H4]-lysine20 N-methyltransferase / histone H4K20 monomethyltransferase activity / histone H4K20 methyltransferase activity / histone H4 methyltransferase activity / positive regulation of isotype switching / condensed chromosome, centromeric region / S-adenosyl-L-methionine binding / muscle organ development / positive regulation of double-strand break repair via nonhomologous end joining / histone methyltransferase activity / intercellular bridge / PKMTs methylate histone lysines / cytoplasmic ribonucleoprotein granule / fibrillar center / mitotic spindle / structural constituent of chromatin / nucleosome / heterochromatin formation / nucleosome assembly / microtubule cytoskeleton / methylation / ciliary basal body / cilium / protein heterodimerization activity / DNA repair / centrosome / chromatin binding / nucleolus / DNA binding / nucleoplasm / metal ion binding / nucleus / plasma membrane
Similarity search - Function
KMT5B , SET domain / Suv4-20 family, animal / Histone-lysine N-methyltransferase Suv4-20/Set9 / Histone-lysine N-methyltransferase, N-terminal domain / Histone-lysine N-methyltransferase (EC 2.1.1.43) family profile. / SET (Su(var)3-9, Enhancer-of-zeste, Trithorax) domain / SET domain / SET domain superfamily / SET domain profile. / SET domain ...KMT5B , SET domain / Suv4-20 family, animal / Histone-lysine N-methyltransferase Suv4-20/Set9 / Histone-lysine N-methyltransferase, N-terminal domain / Histone-lysine N-methyltransferase (EC 2.1.1.43) family profile. / SET (Su(var)3-9, Enhancer-of-zeste, Trithorax) domain / SET domain / SET domain superfamily / SET domain profile. / SET domain / : / 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 / 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 H4 / Histone H2B 1.1 / Histone H3.2 / Histone-lysine N-methyltransferase KMT5B / Histone H2A
Similarity search - Component
Biological speciesXenopus laevis (African clawed frog)
Homo sapiens (human)
Escherichia coli 'BL21-GoldpLysS AG'
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.37 Å
AuthorsAbini-Agbomson, S. / Armache, K.-J.
Funding support United States, 4items
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
Citation
Journal: 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.
#1: Journal: bioRxiv / 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 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 Simon / Jean-Paul Armache / Evgeny Nudler / Geeta Narlikar / Shixin Liu / Chao Lu / Karim-Jean Armache /
Abstract: The intricate regulation of chromatin plays a key role in controlling genome architecture and accessibility. Histone lysine methyltransferases regulate chromatin by catalyzing the methylation of ...The intricate regulation of chromatin plays a key role in controlling genome architecture and accessibility. Histone lysine methyltransferases regulate chromatin by catalyzing the methylation of specific histone residues but are also hypothesized to have equally important non-catalytic roles. SUV420H1 di- and tri-methylates histone H4 lysine 20 (H4K20me2/me3) and plays crucial roles in DNA replication, repair, and heterochromatin formation, and 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 the enzyme likely has uncharacterized non-catalytic activities. To characterize the catalytic and non-catalytic mechanisms SUV420H1 uses to modify chromatin, we determined cryo- EM structures of SUV420H1 complexes with nucleosomes containing histone H2A or its variant H2A.Z. Our structural, biochemical, biophysical, and cellular analyses reveal how both SUV420H1 recognizes its substrate and H2A.Z stimulates its activity, and show that SUV420H1 binding to nucleosomes causes a dramatic detachment of nucleosomal DNA from histone octamer. We hypothesize that this detachment increases DNA accessibility to large macromolecular complexes, a prerequisite for DNA replication and repair. We also show that SUV420H1 can promote chromatin condensates, another non-catalytic role 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
DepositionJun 24, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 13, 2023Provider: repository / Type: Initial release
Revision 1.0Sep 13, 2023Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
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Revision 1.1May 22, 2024Group: Database references / Category: citation / citation_author
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Revision 1.2Oct 16, 2024Group: Data collection / Database references / Structure summary
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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
D: Histone H2B 1.1
E: Histone H3.2
F: Histone H4
G: Histone H2A
H: Histone H2B 1.1
I: DNA (146-MER)
J: DNA (146-MER)
K: Histone-lysine N-methyltransferase KMT5B


Theoretical massNumber of molelcules
Total (without water)243,76411
Polymers243,76411
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 5 types, 9 molecules AEBFCGDHK

#1: Protein Histone H3.2 / Histone H3


Mass: 15303.930 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 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: P84233
#2: Protein Histone H4


Mass: 11396.442 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Gene: LOC121398084
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: A0A8J1LTD2
#3: Protein Histone H2A


Mass: 14109.436 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Gene: hist1h2aj, LOC494591, XELAEV_18003602mg
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: Q6AZJ8
#4: Protein Histone H2B 1.1 / H2B1.1


Mass: 13655.948 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 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: P02281
#7: Protein Histone-lysine N-methyltransferase KMT5B


Mass: 44703.094 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: KMT5B
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: Q4FZB7

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DNA chain , 2 types, 2 molecules IJ

#5: DNA chain DNA (146-MER)


Mass: 44824.570 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
#6: DNA chain DNA (146-MER)


Mass: 45304.863 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)

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Details

Has ligand of interestY
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: SUV420H1-H2A.Z nucleosome complex / Type: COMPLEX / Entity ID: #7, #5-#6, #2, #1 / Source: MULTIPLE SOURCES
Source (natural)Organism: Xenopus laevis (African clawed frog)
Source (recombinant)Organism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
Buffer solutionpH: 7.9 / Details: 50 mM HEPES pH 7.9, 100 mM NaCl, 2 mM DTT
Buffer component
IDConc.NameFormulaBuffer-ID
1100 mMSodium chlorideNaCl1
250 mMHEPESC8H18N2O4S1
32 mMDTTC4H10O2S21
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
8PHENIXmodel refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.37 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 366390 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00412876
ELECTRON MICROSCOPYf_angle_d0.60918251
ELECTRON MICROSCOPYf_dihedral_angle_d26.2785152
ELECTRON MICROSCOPYf_chiral_restr0.0392069
ELECTRON MICROSCOPYf_plane_restr0.0041621

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