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- EMDB-70627: Cryo-EM structure of a tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex -

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Basic information

Entry
Database: EMDB / ID: EMD-70627
TitleCryo-EM structure of a tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex
Map data
Sample
  • Complex: Tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex
    • Protein or peptide: DNA repair protein XRCC3
    • Protein or peptide: DNA repair protein RAD51 homolog 3
    • Protein or peptide: DNA repair protein RAD51 homolog 4
    • Protein or peptide: DNA repair protein XRCC2
  • Ligand: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
KeywordsTetrameric / XRCC3 / RAD51C / RAD51D / XRCC2 / DNA BINDING PROTEIN
Function / homology
Function and homology information


telomeric loop disassembly / meiotic DNA recombinase assembly / Rad51C-XRCC3 complex / Rad51B-Rad51C-Rad51D-XRCC2 complex / double-strand break repair via synthesis-dependent strand annealing / telomere maintenance via telomere trimming / female meiosis sister chromatid cohesion / resolution of mitotic recombination intermediates / positive regulation of mitotic cell cycle spindle assembly checkpoint / crossover junction DNA endonuclease activity ...telomeric loop disassembly / meiotic DNA recombinase assembly / Rad51C-XRCC3 complex / Rad51B-Rad51C-Rad51D-XRCC2 complex / double-strand break repair via synthesis-dependent strand annealing / telomere maintenance via telomere trimming / female meiosis sister chromatid cohesion / resolution of mitotic recombination intermediates / positive regulation of mitotic cell cycle spindle assembly checkpoint / crossover junction DNA endonuclease activity / DNA strand invasion / regulation of centrosome duplication / t-circle formation / Impaired BRCA2 binding to PALB2 / gamma-tubulin binding / telomere maintenance via recombination / regulation of fibroblast apoptotic process / reciprocal meiotic recombination / centrosome cycle / positive regulation of neurogenesis / sister chromatid cohesion / 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) / ATP-dependent DNA damage sensor activity / Resolution of D-loop Structures through Holliday Junction Intermediates / male meiosis I / microtubule organizing center / Presynaptic phase of homologous DNA pairing and strand exchange / positive regulation of G2/M transition of mitotic cell cycle / response to X-ray / ATP-dependent activity, acting on DNA / somitogenesis / interstrand cross-link repair / neurogenesis / telomere maintenance / replication fork / response to gamma radiation / meiotic cell cycle / TP53 Regulates Transcription of DNA Repair Genes / double-strand break repair via homologous recombination / HDR through Homologous Recombination (HRR) / Meiotic recombination / multicellular organism growth / cell junction / mitotic cell cycle / single-stranded DNA binding / Factors involved in megakaryocyte development and platelet production / DNA recombination / spermatogenesis / in utero embryonic development / negative regulation of neuron apoptotic process / chromosome, telomeric region / regulation of cell cycle / DNA repair / DNA damage response / centrosome / perinuclear region of cytoplasm / mitochondrion / DNA binding / nucleoplasm / ATP binding / nucleus / cytoplasm / cytosol
Similarity search - Function
: / DNA repair protein XRCC2 / : / : / : / RAD51D, N-terminal domain / : / : / XRCC3/RpoA-like, helix-hairpin-helix domain / DNA recombination and repair protein, RecA-like ...: / DNA repair protein XRCC2 / : / : / : / RAD51D, N-terminal domain / : / : / XRCC3/RpoA-like, helix-hairpin-helix domain / DNA recombination and repair protein, RecA-like / DNA recombination and repair protein Rad51-like, C-terminal / Rad51 / DNA recombination and repair protein RecA-like, ATP-binding domain / RecA family profile 1. / 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 3 / DNA repair protein XRCC3 / DNA repair protein XRCC2 / DNA repair protein RAD51 homolog 4
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.16 Å
AuthorsRuben EA / Jia L / Olsen SK / Wasmuth EV / Rawal Y / Kwon Y / Sung P
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
CitationJournal: To Be Published
Title: Cryo-EM structure of a tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex.
Authors: Ruben EA / Jia L / Olsen SK / Wasmuth EV / Rawal Y / Kwon Y / Sung P
History
DepositionMay 14, 2025-
Header (metadata) releaseApr 1, 2026-
Map releaseApr 1, 2026-
UpdateApr 1, 2026-
Current statusApr 1, 2026Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_70627.png

Downloads & links

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Map

FileDownload / File: emd_70627.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.87 Å/pix.
x 256 pix.
= 222.72 Å		0.87 Å/pix.
x 256 pix.
= 222.72 Å		0.87 Å/pix.
x 256 pix.
= 222.72 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.87 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy EMDB: 0.095
Minimum - Maximum-1.0353848 - 1.7284904
Average (Standard dev.)0.00028459128 (±0.03921827)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 222.72 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_70627_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram (log scale)

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Additional map: #1

Fileemd_70627_additional_1.map
Projections & Slices
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Histogram (log scale)

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Half map: #1

Fileemd_70627_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_70627_half_map_2.map
Projections & Slices
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Histogram (log scale)

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Sample components

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Entire : Tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex

EntireName: Tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex
Components
  • Complex: Tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex
    • Protein or peptide: DNA repair protein XRCC3
    • Protein or peptide: DNA repair protein RAD51 homolog 3
    • Protein or peptide: DNA repair protein RAD51 homolog 4
    • Protein or peptide: DNA repair protein XRCC2
  • Ligand: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER

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Supramolecule #1: Tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex

SupramoleculeName: Tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: DNA repair protein XRCC3

MacromoleculeName: DNA repair protein XRCC3 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.899781 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MDLDLLDLNP RIIAAIKKAK LKSVKEVLHF SGPDLKRLTN LSSPEVWHLL RTASLHLRGS SILTALQLHQ QKERFPTQHQ RLSLGCPVL DALLRGGLPL DGITELAGRS SAGKTQLALQ LCLAVQFPRQ HGGLEAGAVY ICTEDAFPHK RLQQLMAQQP R LRTDVPGE ...String:
MDLDLLDLNP RIIAAIKKAK LKSVKEVLHF SGPDLKRLTN LSSPEVWHLL RTASLHLRGS SILTALQLHQ QKERFPTQHQ RLSLGCPVL DALLRGGLPL DGITELAGRS SAGKTQLALQ LCLAVQFPRQ HGGLEAGAVY ICTEDAFPHK RLQQLMAQQP R LRTDVPGE LLQKLRFGSQ IFIEHVADVD TLLECVNKKV PVLLSRGMAR LVVIDSVAAP FRCEFDSQAS APRARHLQSL GA TLRELSS AFQSPVLCIN QVTEAMEEQG AAHGPLGFWD ERVSPALGIT WANQLLVRLL ADRLREEEAA LGCPARTLRV LSA PHLPPS SCSYTISAEG VRGTPGTQSH

UniProtKB: DNA repair protein XRCC3

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Macromolecule #2: DNA repair protein RAD51 homolog 3

MacromoleculeName: DNA repair protein RAD51 homolog 3 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 42.244609 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MRGKTFRFEM QRDLVSFPLS PAVRVKLVSA GFQTAEELLE VKPSELSKEV GISKAEALET LQIIRRECLT NKPRYAGTSE SHKKCTALE LLEQEHTQGF IITFCSALDD ILGGGVPLMK TTEICGAPGV GKTQLCMQLA VDVQIPECFG GVAGEAVFID T EGSFMVDR ...String:
MRGKTFRFEM QRDLVSFPLS PAVRVKLVSA GFQTAEELLE VKPSELSKEV GISKAEALET LQIIRRECLT NKPRYAGTSE SHKKCTALE LLEQEHTQGF IITFCSALDD ILGGGVPLMK TTEICGAPGV GKTQLCMQLA VDVQIPECFG GVAGEAVFID T EGSFMVDR VVDLATACIQ HLQLIAEKHK GEEHRKALED FTLDNILSHI YYFRCRDYTE LLAQVYLLPD FLSEHSKVRL VI VDGIAFP FRHDLDDLSL RTRLLNGLAQ QMISLANNHR LAVILTNQMT TKIDRNQALL VPALGESWGH AATIRLIFHW DRK QRLATL YKSPSQKECT VLFQIKPQGF RDTVVTSACS LQTEGSLSTR KRSRDPEEEL

UniProtKB: DNA repair protein RAD51 homolog 3

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Macromolecule #3: DNA repair protein RAD51 homolog 4

MacromoleculeName: DNA repair protein RAD51 homolog 4 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 35.084254 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MGVLRVGLCP GLTEEMIQLL RSHRIKTVVD LVSADLEEVA QKCGLSYKAL VALRRVLLAQ FSAFPVNGAD LYEELKTSTA ILSTGIGSL DKLLDAGLYT GEVTEIVGGP GSGKTQVCLC MAANVAHGLQ QNVLYVDSNG GLTASRLLQL LQAKTQDEEE Q AEALRRIQ ...String:
MGVLRVGLCP GLTEEMIQLL RSHRIKTVVD LVSADLEEVA QKCGLSYKAL VALRRVLLAQ FSAFPVNGAD LYEELKTSTA ILSTGIGSL DKLLDAGLYT GEVTEIVGGP GSGKTQVCLC MAANVAHGLQ QNVLYVDSNG GLTASRLLQL LQAKTQDEEE Q AEALRRIQ VVHAFDIFQM LDVLQELRGT VAQQVTGSSG TVKVVVVDSV TAVVSPLLGG QQREGLALMM QLARELKTLA RD LGMAVVV TNHITRDRDS GRLKPALGRS WSFVPSTRIL LDTIEGAGAS GGRRMACLAK SSRQPTGFQE MVDIGTWGTS EQS ATLQGD QT

UniProtKB: DNA repair protein RAD51 homolog 4

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Macromolecule #4: DNA repair protein XRCC2

MacromoleculeName: DNA repair protein XRCC2 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 31.995525 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MCSAFHRAES GTELLARLEG RSSLKEIEPN LFADEDSPVH GDILEFHGPE GTGKTEMLYH LTARCILPKS EGGLEVEVLF IDTDYHFDM LRLVTILEHR LSQSSEEIIK YCLGRFFLVY CSSSTHLLLT LYSLESMFCS HPSLCLLILD SLSAFYWIDR V NGGESVNL ...String:
MCSAFHRAES GTELLARLEG RSSLKEIEPN LFADEDSPVH GDILEFHGPE GTGKTEMLYH LTARCILPKS EGGLEVEVLF IDTDYHFDM LRLVTILEHR LSQSSEEIIK YCLGRFFLVY CSSSTHLLLT LYSLESMFCS HPSLCLLILD SLSAFYWIDR V NGGESVNL QESTLRKCSQ CLEKLVNDYR LVLFATTQTI MQKASSSSEE PSHASRRLCD VDIDYRPYLC KAWQQLVKHR MF FSKQDDS QSSNQFSLVS RCLKSNSLKK HFFIIGESGV EFC

UniProtKB: DNA repair protein XRCC2

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Macromolecule #5: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER

MacromoleculeName: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER / type: ligand / ID: 5 / Number of copies: 4 / Formula: ANP
Molecular weightTheoretical: 506.196 Da
Chemical component information

ChemComp-ANP:
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER / AMP-PNP, energy-carrying molecule analogue*YM

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS GLACIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

8faz

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.16 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 498106
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION

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