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- PDB-7r76: Cryo-EM structure of DNMT5 in apo state -

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Basic information

Entry
Database: PDB / ID: 7r76
TitleCryo-EM structure of DNMT5 in apo state
ComponentsDNA repair protein Rad8
KeywordsTRANSFERASE / Cytosine-5 methyltransferase / SNF2 ATPase
Function / homology
Function and homology information


ATP-dependent DNA (cytosine-5-)-methyltransferase activity / DNA (cytosine-5-)-methyltransferase activity / DNA methylation-dependent constitutive heterochromatin formation / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / chromosome / methylation / sequence-specific DNA binding / DNA repair / chromatin binding / ATP hydrolysis activity ...ATP-dependent DNA (cytosine-5-)-methyltransferase activity / DNA (cytosine-5-)-methyltransferase activity / DNA methylation-dependent constitutive heterochromatin formation / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / chromosome / methylation / sequence-specific DNA binding / DNA repair / chromatin binding / ATP hydrolysis activity / ATP binding / nucleus
Similarity search - Function
: / C-5 cytosine methyltransferase / C-5 cytosine-specific DNA methylase / Chromo domain / Chromo (CHRromatin Organisation MOdifier) domain / Chromo and chromo shadow domain profile. / Chromo/chromo shadow domain / Chromatin organization modifier domain / Chromo-like domain superfamily / : ...: / C-5 cytosine methyltransferase / C-5 cytosine-specific DNA methylase / Chromo domain / Chromo (CHRromatin Organisation MOdifier) domain / Chromo and chromo shadow domain profile. / Chromo/chromo shadow domain / Chromatin organization modifier domain / Chromo-like domain superfamily / : / SNF2-like, N-terminal domain superfamily / SNF2, N-terminal / SNF2-related domain / Helicase conserved C-terminal domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / S-adenosyl-L-methionine-dependent methyltransferase superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
DNA (cytosine-5-)-methyltransferase DMT5
Similarity search - Component
Biological speciesCryptococcus neoformans var. grubii serotype A (fungus)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsWang, J. / Patel, D.J.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)P30CA008748 United States
CitationJournal: Mol Cell / Year: 2022
Title: Structural insights into DNMT5-mediated ATP-dependent high-fidelity epigenome maintenance.
Authors: Juncheng Wang / Sandra Catania / Chongyuan Wang / M Jason de la Cruz / Beiduo Rao / Hiten D Madhani / Dinshaw J Patel /
Abstract: Epigenetic evolution occurs over million-year timescales in Cryptococcus neoformans and is mediated by DNMT5, the first maintenance type cytosine methyltransferase identified in the fungal or protist ...Epigenetic evolution occurs over million-year timescales in Cryptococcus neoformans and is mediated by DNMT5, the first maintenance type cytosine methyltransferase identified in the fungal or protist kingdoms, the first dependent on adenosine triphosphate (ATP), and the most hemimethyl-DNA-specific enzyme known. To understand these novel properties, we solved cryo-EM structures of CnDNMT5 in three states. These studies reveal an elaborate allosteric cascade in which hemimethylated DNA binding first activates the SNF2 ATPase domain by a large rigid body rotation while the target cytosine partially flips out of the DNA duplex. ATP binding then triggers striking structural reconfigurations of the methyltransferase catalytic pocket to enable cofactor binding, completion of base flipping, and catalysis. Bound unmethylated DNA does not open the catalytic pocket and is instead ejected upon ATP binding, driving high fidelity. This unprecedented chaperone-like, enzyme-remodeling role of the SNF2 ATPase domain illuminates how energy is used to enable faithful epigenetic memory.
History
DepositionJun 24, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 23, 2022Provider: repository / Type: Initial release
Revision 1.1Mar 9, 2022Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID
Revision 1.2Mar 30, 2022Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Jun 5, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

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Assembly

Deposited unit
A: DNA repair protein Rad8
hetero molecules


Theoretical massNumber of molelcules
Total (without water)264,1396
Polymers263,8121
Non-polymers3275
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein DNA repair protein Rad8


Mass: 263811.656 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Cryptococcus neoformans var. grubii serotype A (strain H99 / ATCC 208821 / CBS 10515 / FGSC 9487) (fungus)
Strain: H99 / ATCC 208821 / CBS 10515 / FGSC 9487 / Gene: CNAG_07552 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: J9VI03
#2: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY

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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: DNMT5 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.26 MDa / Experimental value: NO
Source (natural)Organism: Cryptococcus neoformans (fungus)
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 8
SpecimenConc.: 0.19 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 278 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 magnification: 22500 X / Calibrated magnification: 47262 X
Image recordingElectron dose: 53 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.18.2_3874: / Classification: refinement
EM software
IDNameCategory
7UCSF Chimeramodel fitting
9RELIONinitial Euler assignment
13PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 72216 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00814788
ELECTRON MICROSCOPYf_angle_d0.96520010
ELECTRON MICROSCOPYf_dihedral_angle_d6.5541979
ELECTRON MICROSCOPYf_chiral_restr0.0572233
ELECTRON MICROSCOPYf_plane_restr0.0062590

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