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- PDB-9baz: CryoEM structure of DIM2-HP1 complex -

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Basic information

Entry
Database: PDB / ID: 9baz
TitleCryoEM structure of DIM2-HP1 complex
Components
  • DNA (cytosine-5-)-methyltransferase
  • Heterochromatin protein one
KeywordsTRANSFERASE / DNA methyltransferase
Function / homology
Function and homology information


organic cyclic compound binding / DNA (cytosine-5-)-methyltransferase / DNA (cytosine-5-)-methyltransferase activity / pericentric heterochromatin / methylated histone binding / methylation / chromatin remodeling / chromatin binding / negative regulation of transcription by RNA polymerase II / DNA binding / nucleus
Similarity search - Function
Chromo shadow domain / Chromo shadow domain / Chromo Shadow Domain / Chromo domain, conserved site / Chromo domain signature. / DNA methylase, C-5 cytosine-specific, active site / C-5 cytosine-specific DNA methylases active site. / C-5 cytosine-specific DNA methylase (Dnmt) domain profile. / C-5 cytosine methyltransferase / C-5 cytosine-specific DNA methylase ...Chromo shadow domain / Chromo shadow domain / Chromo Shadow Domain / Chromo domain, conserved site / Chromo domain signature. / DNA methylase, C-5 cytosine-specific, active site / C-5 cytosine-specific DNA methylases active site. / C-5 cytosine-specific DNA methylase (Dnmt) domain profile. / C-5 cytosine methyltransferase / C-5 cytosine-specific DNA methylase / Chromo domain / Chromo (CHRromatin Organisation MOdifier) domain / Chromo and chromo shadow domain profile. / Bromo adjacent homology (BAH) domain superfamily / Bromo adjacent homology (BAH) domain / BAH domain profile. / Chromo/chromo shadow domain / Chromatin organization modifier domain / Chromo-like domain superfamily / S-adenosyl-L-methionine-dependent methyltransferase superfamily
Similarity search - Domain/homology
S-ADENOSYL-L-HOMOCYSTEINE / Heterochromatin protein one / DNA (cytosine-5-)-methyltransferase
Similarity search - Component
Biological speciesNeurospora crassa (fungus)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.76 Å
AuthorsSong, J. / Shao, Z.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
CitationJournal: To Be Published
Title: CryoEM structure of DIM2-HP1 complex
Authors: Song, J. / Shao, Z.
History
DepositionApr 5, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 24, 2024Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: DNA (cytosine-5-)-methyltransferase
B: Heterochromatin protein one
C: Heterochromatin protein one
hetero molecules


Theoretical massNumber of molelcules
Total (without water)201,3645
Polymers200,9143
Non-polymers4502
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

#1: Protein DNA (cytosine-5-)-methyltransferase


Mass: 139935.891 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Neurospora crassa (fungus) / Gene: dim-2, GE21DRAFT_10473 / Production host: Escherichia coli BL21(DE3) (bacteria)
References: UniProt: Q96W73, DNA (cytosine-5-)-methyltransferase
#2: Protein Heterochromatin protein one


Mass: 30489.086 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Neurospora crassa (fungus) / Gene: 49D12.150, hpo, GE21DRAFT_9232 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q870N8
#3: Chemical ChemComp-SAH / S-ADENOSYL-L-HOMOCYSTEINE


Type: L-peptide linking / Mass: 384.411 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C14H20N6O5S / Source: (gene. exp.) Neurospora crassa (fungus) / Production host: Escherichia coli BL21(DE3) (bacteria)
#4: Chemical ChemComp-ZN / ZINC ION


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

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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: DIM2-HP1 complex / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Neurospora crassa (fungus)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
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: 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: 2500 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.21_5207: / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.76 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 296077 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0038519
ELECTRON MICROSCOPYf_angle_d0.59411624
ELECTRON MICROSCOPYf_dihedral_angle_d4.2541189
ELECTRON MICROSCOPYf_chiral_restr0.0421263
ELECTRON MICROSCOPYf_plane_restr0.0041514

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