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- PDB-8kg6: Yeast replisome in state I -

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Entry
Database: PDB / ID: 8kg6
TitleYeast replisome in state I
Components
  • (DNA polymerase epsilon ...) x 2
  • (DNA replication complex GINS protein ...) x 4
  • (DNA replication licensing factor ...) x 5
  • Cell division control protein 45
  • Chromosome segregation in meiosis protein 3
  • DNA (61-mer)
  • DNA (71-mer)
  • DNA polymerase alpha-binding protein
  • Minichromosome maintenance protein 5
  • Topoisomerase 1-associated factor 1
KeywordsREPLICATION / replisome / complex / DNA replication
Function / homology
Function and homology information


establishment of sister chromatid cohesion / DNA-templated DNA replication maintenance of fidelity / gene conversion / maintenance of DNA repeat elements / Unwinding of DNA / replication fork arrest / DNA replication initiation / Cul8-RING ubiquitin ligase complex / meiotic chromosome segregation / epsilon DNA polymerase complex ...establishment of sister chromatid cohesion / DNA-templated DNA replication maintenance of fidelity / gene conversion / maintenance of DNA repeat elements / Unwinding of DNA / replication fork arrest / DNA replication initiation / Cul8-RING ubiquitin ligase complex / meiotic chromosome segregation / epsilon DNA polymerase complex / DNA strand elongation involved in mitotic DNA replication / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / nuclear DNA replication / MCM complex binding / GINS complex / mitotic DNA replication preinitiation complex assembly / premeiotic DNA replication / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / nucleotide-excision repair, DNA gap filling / SUMO binding / mitotic DNA replication / DNA replication proofreading / Activation of the pre-replicative complex / CMG complex / single-stranded DNA 3'-5' DNA exonuclease activity / establishment of mitotic sister chromatid cohesion / DNA replication checkpoint signaling / nuclear pre-replicative complex / Activation of ATR in response to replication stress / MCM complex / DNA replication preinitiation complex / double-strand break repair via break-induced replication / mitotic DNA replication checkpoint signaling / replication fork protection complex / mitotic DNA replication initiation / single-stranded DNA helicase activity / mitotic intra-S DNA damage checkpoint signaling / Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters / silent mating-type cassette heterochromatin formation / regulation of DNA-templated DNA replication initiation / DNA strand elongation involved in DNA replication / mitotic sister chromatid cohesion / leading strand elongation / nuclear chromosome / DNA unwinding involved in DNA replication / replication fork processing / DNA replication origin binding / nuclear replication fork / subtelomeric heterochromatin formation / DNA replication initiation / error-prone translesion synthesis / heterochromatin formation / base-excision repair, gap-filling / DNA helicase activity / meiotic cell cycle / replication fork / helicase activity / base-excision repair / DNA-templated DNA replication / nucleosome assembly / double-strand break repair via nonhomologous end joining / double-strand break repair / single-stranded DNA binding / mitotic cell cycle / 4 iron, 4 sulfur cluster binding / double-stranded DNA binding / DNA helicase / DNA replication / chromosome, telomeric region / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / cell cycle / nucleotide binding / mRNA binding / DNA repair / DNA damage response / chromatin binding / ATP hydrolysis activity / DNA binding / zinc ion binding / nucleoplasm / ATP binding / identical protein binding / metal ion binding / nucleus / cytosol / cytoplasm
Similarity search - Function
Chromosome segregation in meiosis protein 3 / TIPIN/Csm3/Swi3 / Replication Fork Protection Component Swi3 / Timeless / DNA polymerase epsilon, subunit B / Timeless, N-terminal / Timeless protein / : / DNA polymerase alpha-binding protein Ctf4, C-terminal domain / Minichromosome loss protein Mcl1, middle region ...Chromosome segregation in meiosis protein 3 / TIPIN/Csm3/Swi3 / Replication Fork Protection Component Swi3 / Timeless / DNA polymerase epsilon, subunit B / Timeless, N-terminal / Timeless protein / : / DNA polymerase alpha-binding protein Ctf4, C-terminal domain / Minichromosome loss protein Mcl1, middle region / Minichromosome loss protein, Mcl1, middle region / DNA polymerase epsilon, catalytic subunit A, C-terminal / DNA polymerase epsilon catalytic subunit / Domain of unknown function (DUF1744) / DUF1744 / CDC45 family / CDC45-like protein / DNA replication complex GINS protein Psf2 / GINS complex, subunit Psf1 / GINS complex, subunit Psf3 / GINS complex, subunit Psf3 superfamily / DNA replication complex GINS protein SLD5, C-terminal / GINS, helical bundle-like domain superfamily / GINS complex protein Sld5, alpha-helical domain / DNA replication complex GINS protein SLD5 C-terminus / GINS complex subunit Sld5 / GINS subunit, domain A / GINS complex protein / MCM4, winged helix domain / DNA polymerase alpha/delta/epsilon, subunit B / DNA replication licensing factor Mcm5 / DNA polymerase alpha/epsilon subunit B / DNA replication licensing factor Mcm3 / Mini-chromosome maintenance complex protein 4 / DNA replication licensing factor Mcm6 / DNA replication licensing factor Mcm7 / Mcm6, C-terminal winged-helix domain / MCM6 C-terminal winged-helix domain / DNA replication licensing factor Mcm2 / Mini-chromosome maintenance protein 2 / Mini-chromosome maintenance, conserved site / MCM family signature. / MCM N-terminal domain / MCM N-terminal domain / MCM OB domain / MCM OB domain / Mini-chromosome maintenance protein / MCM, AAA-lid domain / MCM P-loop domain / MCM AAA-lid domain / MCM family domain profile. / minichromosome maintenance proteins / MCM domain / DNA polymerase family B, thumb domain / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA-directed DNA polymerase, family B, multifunctional domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / Winged helix-like DNA-binding domain superfamily / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Nucleic acid-binding, OB-fold / DNA/RNA polymerase superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / DNA / DNA (> 10) / DNA polymerase epsilon catalytic subunit A / DNA replication licensing factor MCM3 / DNA polymerase epsilon subunit B / DNA replication licensing factor MCM2 / Minichromosome maintenance protein 5 / DNA replication licensing factor MCM4 ...ADENOSINE-5'-DIPHOSPHATE / PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / DNA / DNA (> 10) / DNA polymerase epsilon catalytic subunit A / DNA replication licensing factor MCM3 / DNA polymerase epsilon subunit B / DNA replication licensing factor MCM2 / Minichromosome maintenance protein 5 / DNA replication licensing factor MCM4 / DNA replication licensing factor MCM7 / DNA replication complex GINS protein PSF2 / DNA replication licensing factor MCM6 / Topoisomerase 1-associated factor 1 / DNA polymerase alpha-binding protein / DNA replication complex GINS protein SLD5 / Chromosome segregation in meiosis protein 3 / Cell division control protein 45 / DNA replication complex GINS protein PSF3 / DNA replication complex GINS protein PSF1
Similarity search - Component
Biological speciesSaccharomyces cerevisiae S288C (yeast)
Saccharomyces cerevisiae (brewer's yeast)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.07 Å
AuthorsDang, S. / Zhai, Y. / Feng, J. / Yu, D. / Xu, Z.
Funding support Hong Kong, 8items
OrganizationGrant numberCountry
The University Grants Committee, Research Grants Council (RGC)GRF16104617 Hong Kong
The University Grants Committee, Research Grants Council (RGC)GRF16103918 Hong Kong
The University Grants Committee, Research Grants Council (RGC)GRF17112119 Hong Kong
The University Grants Committee, Research Grants Council (RGC)GRF17101720 Hong Kong
The University Grants Committee, Research Grants Council (RGC)C7028-19GF Hong Kong
The University Grants Committee, Research Grants Council (RGC)C7009-20GF Hong Kong
The University Grants Committee, Research Grants Council (RGC)ECS26101919 Hong Kong
The University Grants Committee, Research Grants Council (RGC)GRF16103321 Hong Kong
CitationJournal: Nat Commun / Year: 2023
Title: Synergism between CMG helicase and leading strand DNA polymerase at replication fork.
Authors: Zhichun Xu / Jianrong Feng / Daqi Yu / Yunjing Huo / Xiaohui Ma / Wai Hei Lam / Zheng Liu / Xiang David Li / Toyotaka Ishibashi / Shangyu Dang / Yuanliang Zhai /
Abstract: The replisome that replicates the eukaryotic genome consists of at least three engines: the Cdc45-MCM-GINS (CMG) helicase that separates duplex DNA at the replication fork and two DNA polymerases, ...The replisome that replicates the eukaryotic genome consists of at least three engines: the Cdc45-MCM-GINS (CMG) helicase that separates duplex DNA at the replication fork and two DNA polymerases, one on each strand, that replicate the unwound DNA. Here, we determined a series of cryo-electron microscopy structures of a yeast replisome comprising CMG, leading-strand polymerase Polε and three accessory factors on a forked DNA. In these structures, Polε engages or disengages with the motor domains of the CMG by occupying two alternative positions, which closely correlate with the rotational movement of the single-stranded DNA around the MCM pore. During this process, the polymerase remains stably coupled to the helicase using Psf1 as a hinge. This synergism is modulated by a concerted rearrangement of ATPase sites to drive DNA translocation. The Polε-MCM coupling is not only required for CMG formation to initiate DNA replication but also facilitates the leading-strand DNA synthesis mediated by Polε. Our study elucidates a mechanism intrinsic to the replisome that coordinates the activities of CMG and Polε to negotiate any roadblocks, DNA damage, and epigenetic marks encountered during translocation along replication forks.
History
DepositionAug 17, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 6, 2023Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
2: DNA replication licensing factor MCM2
3: DNA replication licensing factor MCM3
4: DNA replication licensing factor MCM4
5: Minichromosome maintenance protein 5
6: DNA replication licensing factor MCM6
7: DNA replication licensing factor MCM7
A: DNA replication complex GINS protein PSF1
B: DNA replication complex GINS protein PSF2
C: DNA replication complex GINS protein PSF3
D: DNA replication complex GINS protein SLD5
E: Cell division control protein 45
F: DNA polymerase alpha-binding protein
G: DNA polymerase alpha-binding protein
H: DNA polymerase alpha-binding protein
I: DNA (71-mer)
J: DNA (61-mer)
K: Topoisomerase 1-associated factor 1
L: Chromosome segregation in meiosis protein 3
M: DNA polymerase epsilon catalytic subunit A
N: DNA polymerase epsilon subunit B
hetero molecules


Theoretical massNumber of molelcules
Total (without water)1,655,39737
Polymers1,652,39320
Non-polymers3,00417
Water0
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

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DNA replication licensing factor ... , 5 types, 5 molecules 23467

#1: Protein DNA replication licensing factor MCM2 / Minichromosome maintenance protein 2


Mass: 98911.539 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: MCM2 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P29469, DNA helicase
#2: Protein DNA replication licensing factor MCM3


Mass: 107653.508 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: MCM3 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P24279
#3: Protein DNA replication licensing factor MCM4 / Cell division control protein 54


Mass: 105138.375 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: MCM4 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P30665, DNA helicase
#5: Protein DNA replication licensing factor MCM6 / Minichromosome maintenance protein 6


Mass: 113110.211 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: MCM6 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P53091, DNA helicase
#6: Protein DNA replication licensing factor MCM7 / Cell division control protein 47 / Minichromosome maintenance protein 7


Mass: 95049.875 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: MCM7 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P38132, DNA helicase

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Protein , 5 types, 7 molecules 5EFGHKL

#4: Protein Minichromosome maintenance protein 5 /


Mass: 86505.734 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: MCM5 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P29496
#11: Protein Cell division control protein 45


Mass: 74324.836 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: CDC45 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: Q08032
#12: Protein DNA polymerase alpha-binding protein


Mass: 104543.391 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: CTF4 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: Q01454
#15: Protein Topoisomerase 1-associated factor 1


Mass: 141296.875 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: TOF1 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P53840
#16: Protein Chromosome segregation in meiosis protein 3 /


Mass: 36402.590 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: CSM3 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: Q04659

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DNA replication complex GINS protein ... , 4 types, 4 molecules ABCD

#7: Protein DNA replication complex GINS protein PSF1


Mass: 24230.576 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: PSF1 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: Q12488
#8: Protein DNA replication complex GINS protein PSF2


Mass: 25096.807 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: PSF2 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P40359
#9: Protein DNA replication complex GINS protein PSF3


Mass: 21977.135 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: PSF3 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: Q12146
#10: Protein DNA replication complex GINS protein SLD5


Mass: 33983.617 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: SLD5 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: Q03406

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DNA chain , 2 types, 2 molecules IJ

#13: DNA chain DNA (71-mer)


Mass: 22138.150 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Saccharomyces cerevisiae (brewer's yeast)
#14: DNA chain DNA (61-mer)


Mass: 18524.887 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Saccharomyces cerevisiae (brewer's yeast)

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DNA polymerase epsilon ... , 2 types, 2 molecules MN

#17: Protein DNA polymerase epsilon catalytic subunit A


Mass: 255992.484 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: POL2 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P21951
#18: Protein DNA polymerase epsilon subunit B /


Mass: 78425.852 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c / Gene: DPB2 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P24482

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Non-polymers , 4 types, 17 molecules

#19: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
#20: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE / Adenosine diphosphate


Mass: 427.201 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Feature type: SUBJECT OF INVESTIGATION / Comment: ADP, energy-carrying molecule*YM
#21: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
#22: Chemical ChemComp-AGS / PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / ATP-GAMMA-S / ADENOSINE 5'-(3-THIOTRIPHOSPHATE) / ADENOSINE 5'-(GAMMA-THIOTRIPHOSPHATE) / ADENOSINE-5'-DIPHOSPHATE MONOTHIOPHOSPHATE


Mass: 523.247 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C10H16N5O12P3S / Feature type: SUBJECT OF INVESTIGATION / Comment: ATP-gamma-S, energy-carrying molecule analogue*YM

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Details

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: replisome complex in state I / Type: COMPLEX / Entity ID: #1-#18 / Source: RECOMBINANT
Molecular weightValue: 1.70 MDa / Experimental value: NO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Source (recombinant)Organism: Saccharomyces cerevisiae (brewer's yeast)
Buffer solutionpH: 7.6
Buffer component
IDConc.NameFormulaBuffer-ID
1100 mMsodium potassiumKCl1
225 mM4-(2-hydroxyethyl)-1-piperazineethanesulfonic acidHEPES1
34 mMmagnesium chlorideMgCl21
40.5 mMAdenosine 5'-O-(3-thio)triphosphateATP-gamma-S1
SpecimenConc.: 2 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: C-flat-1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K
Details: blot with filter paper for 3-4 seconds before plunging.

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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 FIELDBright-field microscopy / Nominal magnification: 81000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 4.5 sec. / Electron dose: 53 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 4 / Num. of real images: 21776
Details: Images were collected in movie-mode containing 40 frames.
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV
Image scansSampling size: 5 µm / Width: 5760 / Height: 4092

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Processing

EM software
IDNameVersionCategory
1Gautomatchv0.56particle selection
2EPU2.10.0image acquisition
4Gctfv1.18CTF correction
7UCSF Chimeramodel fitting
9PHENIXmodel refinement
10Cootmodel refinement
11cryoSPARCv3.0.1initial Euler assignment
12cryoSPARCv2.15.0initial Euler assignment
13cryoSPARCv3.0.1final Euler assignment
14cryoSPARCv2.15.0final Euler assignment
16cryoSPARCv3.0.13D reconstruction
17cryoSPARCv2.15.03D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.07 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 384519 / Algorithm: EXACT BACK PROJECTION / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: AB INITIO MODEL / Space: REAL
Atomic model buildingPDB-ID: 6XKL

6xkl


Accession code: 6XKL / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00472113
ELECTRON MICROSCOPYf_angle_d0.50897789
ELECTRON MICROSCOPYf_dihedral_angle_d9.33410044
ELECTRON MICROSCOPYf_chiral_restr0.04111166
ELECTRON MICROSCOPYf_plane_restr0.00412287

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