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- PDB-9ea2: T4 Bacteriophage Replicative Polymerase Captured in Polymerase Ex... -

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Basic information

Entry
Database: PDB / ID: 9ea2
TitleT4 Bacteriophage Replicative Polymerase Captured in Polymerase Exchange State 2
Components
  • DNA (38-MER)
  • DNA (5'-AGC TAT GAC CAT GAT TAC GAA TTG ddC-3')
  • DNA-directed DNA polymerase
  • Sliding clamp
Keywordsreplication/DNA / replication / T4 / holoenzyme / replication-DNA complex
Function / homology
Function and homology information


bidirectional double-stranded viral DNA replication / viral DNA genome replication / Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters / DNA polymerase processivity factor activity / viral transcription / 3'-5' exonuclease activity / DNA-templated DNA replication / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA replication ...bidirectional double-stranded viral DNA replication / viral DNA genome replication / Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters / DNA polymerase processivity factor activity / viral transcription / 3'-5' exonuclease activity / DNA-templated DNA replication / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA replication / nucleotide binding / DNA binding / metal ion binding
Similarity search - Function
Sliding clamp, C-terminal / Sliding clamp / gp45 sliding clamp, C terminal / DNA polymerase processivity factor / DNA polymerase processivity factor / DNA-directed DNA polymerase T4 type / : / DNA-directed DNA polymerase, family B, multifunctional domain / DNA-directed DNA polymerase, family B, conserved site / DNA polymerase family B signature. ...Sliding clamp, C-terminal / Sliding clamp / gp45 sliding clamp, C terminal / DNA polymerase processivity factor / DNA polymerase processivity factor / DNA-directed DNA polymerase T4 type / : / DNA-directed DNA polymerase, family B, multifunctional domain / DNA-directed DNA polymerase, family B, conserved site / DNA polymerase family B signature. / DNA polymerase family B / : / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA-directed DNA polymerase / Sliding clamp
Similarity search - Component
Biological speciesEscherichia phage T4 (virus)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsLi, H. / Feng, X.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM013306 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM131754 United States
CitationJournal: To Be Published
Title: Structural insights into the exchange mechanism of a replicative DNA polymerase
Authors: Feng, X. / Spiering, M.M. / Santos, R. / Benkovic, S.J. / Li, H.
History
DepositionNov 10, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 19, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: DNA-directed DNA polymerase
B: Sliding clamp
C: DNA-directed DNA polymerase
D: Sliding clamp
E: Sliding clamp
P: DNA (5'-AGC TAT GAC CAT GAT TAC GAA TTG ddC-3')
T: DNA (38-MER)


Theoretical massNumber of molelcules
Total (without water)301,4097
Polymers301,4097
Non-polymers00
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-directed DNA polymerase


Mass: 103702.797 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia phage T4 (virus) / Production host: Escherichia coli BL21(DE3) (bacteria)
References: UniProt: A0A7S9SVB6, DNA-directed DNA polymerase, Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters
#2: Protein Sliding clamp / DNA polymerase accessory protein Gp45 / DNA polymerase clamp / Gene product 45 / gp45 / Sliding clamp Gp45


Mass: 24881.223 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia phage T4 (virus) / Gene: 45 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P04525
#3: DNA chain DNA (5'-AGC TAT GAC CAT GAT TAC GAA TTG ddC-3')


Mass: 7681.985 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#4: DNA chain DNA (38-MER)


Mass: 11677.539 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
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: T4 bacteriophage replication holoenzyme complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Escherichia phage T4 (virus)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMHEPESHEPES1
2150 mMPotassium acetateKoAC1
310 mMMagnesium chlorideMgCl21
42 mMDithiothreitolDTT1
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 283 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 51 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4.2.1particle selection
2SerialEM9.03image acquisition
4cryoSPARC4.2.1CTF correction
7PHENIX1.2model fitting
9cryoSPARC4.2.1initial Euler assignment
10cryoSPARC4.2.1final Euler assignment
11cryoSPARC4.2.1classification
12cryoSPARC4.2.13D reconstruction
13PHENIX1.2model refinement
14Coot0.9.8model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 164340 / Symmetry type: POINT
Atomic model buildingB value: 157.6 / Protocol: OTHER / Space: REAL
Atomic model building
IDPDB-ID 3D fitting-IDAccession codeInitial refinement model-IDSource nameType
11CZD

1czd

11CZD1PDBexperimental model
21AlphaFoldin silico model

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