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- EMDB-9568: human RAD51 presynaptic complex -

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Basic information

Entry
Database: EMDB / ID: EMD-9568
Titlehuman RAD51 presynaptic complex
Map data
Sample
  • Complex: Arrested state in human RAD51-mediated DNA strand exchange
Function / homology
Function and homology information


presynaptic intermediate filament cytoskeleton / response to glucoside / mitotic recombination-dependent replication fork processing / cellular response to camptothecin / chromosome organization involved in meiotic cell cycle / DNA recombinase assembly / telomere maintenance via telomere lengthening / : / double-strand break repair involved in meiotic recombination / nuclear ubiquitin ligase complex ...presynaptic intermediate filament cytoskeleton / response to glucoside / mitotic recombination-dependent replication fork processing / cellular response to camptothecin / chromosome organization involved in meiotic cell cycle / DNA recombinase assembly / telomere maintenance via telomere lengthening / : / double-strand break repair involved in meiotic recombination / nuclear ubiquitin ligase complex / cellular response to cisplatin / DNA strand invasion / cellular response to hydroxyurea / mitotic recombination / lateral element / DNA strand exchange activity / replication-born double-strand break repair via sister chromatid exchange / Impaired BRCA2 binding to PALB2 / telomere maintenance via recombination / regulation of DNA damage checkpoint / single-stranded DNA helicase activity / reciprocal meiotic recombination / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / Resolution of D-loop Structures through Holliday Junction Intermediates / HDR through Single Strand Annealing (SSA) / ATP-dependent DNA damage sensor activity / Impaired BRCA2 binding to RAD51 / regulation of double-strand break repair via homologous recombination / nuclear chromosome / replication fork processing / Transcriptional Regulation by E2F6 / : / Presynaptic phase of homologous DNA pairing and strand exchange / ATP-dependent activity, acting on DNA / response to X-ray / interstrand cross-link repair / DNA polymerase binding / condensed chromosome / male germ cell nucleus / condensed nuclear chromosome / meiotic cell cycle / cellular response to ionizing radiation / cellular response to gamma radiation / double-strand break repair via homologous recombination / PML body / HDR through Homologous Recombination (HRR) / Meiotic recombination / response to toxic substance / single-stranded DNA binding / site of double-strand break / double-stranded DNA binding / DNA recombination / chromosome, telomeric region / mitochondrial matrix / response to xenobiotic stimulus / DNA repair / centrosome / DNA damage response / chromatin binding / nucleolus / chromatin / perinuclear region of cytoplasm / enzyme binding / protein-containing complex / ATP hydrolysis activity / mitochondrion / nucleoplasm / ATP binding / identical protein binding / nucleus / cytosol / cytoplasm
Similarity search - Function
DNA recombination/repair protein Rad51 / DNA recombination and repair protein, RecA-like / DNA recombination and repair protein Rad51-like, C-terminal / Rad51 / DNA recombination and repair protein RecA, monomer-monomer interface / RecA family profile 2. / DNA recombination and repair protein RecA-like, ATP-binding domain / RecA family profile 1. / DNA repair Rad51/transcription factor NusA, alpha-helical / Helix-hairpin-helix domain ...DNA recombination/repair protein Rad51 / DNA recombination and repair protein, RecA-like / DNA recombination and repair protein Rad51-like, C-terminal / Rad51 / DNA recombination and repair protein RecA, monomer-monomer interface / RecA family profile 2. / DNA recombination and repair protein RecA-like, ATP-binding domain / RecA family profile 1. / DNA repair Rad51/transcription factor NusA, alpha-helical / Helix-hairpin-helix domain / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
DNA repair protein RAD51 homolog 1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodhelical reconstruction / cryo EM / Resolution: 14.0 Å
AuthorsXu J / Zhao L / Xu Y / Zhao W / Sung P / Wang HW
CitationJournal: Nat Struct Mol Biol / Year: 2017
Title: Cryo-EM structures of human RAD51 recombinase filaments during catalysis of DNA-strand exchange.
Authors: Jingfei Xu / Lingyun Zhao / Yuanyuan Xu / Weixing Zhao / Patrick Sung / Hong-Wei Wang /
Abstract: The central step in eukaryotic homologous recombination (HR) is ATP-dependent DNA-strand exchange mediated by the Rad51 recombinase. In this process, Rad51 assembles on single-stranded DNA (ssDNA) ...The central step in eukaryotic homologous recombination (HR) is ATP-dependent DNA-strand exchange mediated by the Rad51 recombinase. In this process, Rad51 assembles on single-stranded DNA (ssDNA) and generates a helical filament that is able to search for and invade homologous double-stranded DNA (dsDNA), thus leading to strand separation and formation of new base pairs between the initiating ssDNA and the complementary strand within the duplex. Here, we used cryo-EM to solve the structures of human RAD51 in complex with DNA molecules, in presynaptic and postsynaptic states, at near-atomic resolution. Our structures reveal both conserved and distinct structural features of the human RAD51-DNA complexes compared with their prokaryotic counterpart. Notably, we also captured the structure of an arrested synaptic complex. Our results provide new insight into the molecular mechanisms of the DNA homology search and strand-exchange processes.
History
DepositionOct 8, 2016-
Header (metadata) releaseNov 2, 2016-
Map releaseDec 21, 2016-
UpdateJan 25, 2017-
Current statusJan 25, 2017Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.55
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.55
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_9568.png

Downloads & links

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Map

FileDownload / File: emd_9568.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 400 pix.
= 420. Å		1.05 Å/pix.
x 400 pix.
= 420. Å		1.05 Å/pix.
x 400 pix.
= 420. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.05 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.55 / Movie #1: 0.55
Minimum - Maximum-0.2945868 - 1.0507883
Average (Standard dev.)0.010550541 (±0.08465524)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-200-200-200
Dimensions400400400
Spacing400400400
CellA=B=C: 419.99997 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.051.051.05
M x/y/z400400400
origin x/y/z0.0000.0000.000
length x/y/z420.000420.000420.000
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ256256256
MAP C/R/S123
start NC/NR/NS-200-200-200
NC/NR/NS400400400
D min/max/mean-0.2951.0510.011

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Supplemental data

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Sample components

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Entire : Arrested state in human RAD51-mediated DNA strand exchange

EntireName: Arrested state in human RAD51-mediated DNA strand exchange
Components
  • Complex: Arrested state in human RAD51-mediated DNA strand exchange

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Supramolecule #1: Arrested state in human RAD51-mediated DNA strand exchange

SupramoleculeName: Arrested state in human RAD51-mediated DNA strand exchange
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 26.12 kDa/nm

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Experimental details

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Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statefilament

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Sample preparation

Concentration0.075 mg/mL
BufferpH: 7.5
Details: 25mM Tris-HCl, pH 7.5, 50mM KCl, 1mM dithiothreitol, 1mM AMP-PNP, 2mM MgCl2
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Support film - Film thickness: 20.0 nm / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 101.325 kPa
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 289 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
TemperatureMin: 80.0 K / Max: 80.0 K
Image recordingFilm or detector model: FEI FALCON II (4k x 4k) / Detector mode: OTHER / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Digitization - Sampling interval: 14.0 µm / Digitization - Frames/image: 1-27 / Number grids imaged: 1 / Number real images: 202 / Average exposure time: 1.7 sec. / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Calibrated defocus max: 2.5 µm / Calibrated defocus min: 1.5 µm / Calibrated magnification: 22500 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.5 µm / Nominal magnification: 22500
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Helical parameters - Δz: 15.27 Å
Applied symmetry - Helical parameters - Δ&Phi: 56.4 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 14.0 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: FREALIGN (ver. 9.09) / Number images used: 1998
CTF correctionSoftware - Name: CTFFIND3
Segment selectionNumber selected: 28455 / Software - Name: EMAN2 (ver. 2.1)
Startup modelType of model: OTHER
Details: Initial model is from Rad51 presynaptic complex low-pass filtered to 60 angstrom.
Final angle assignmentType: NOT APPLICABLE / Software - Name: FREALIGN (ver. 9.09)

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Atomic model buiding 1

RefinementSpace: REAL

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