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- PDB-7ejc: human RAD51 presynaptic complex -

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Basic information

Entry
Database: PDB / ID: 7ejc
Titlehuman RAD51 presynaptic complex
Components
  • DNA (5'-D(P*TP*TP*TP*TP*TP*TP*TP*TP*T)-3')
  • DNA repair protein RAD51 homolog 1
KeywordsDNA BINDING PROTEIN/DNA / DNA BINDING PROTEIN-DNA complex
Function / homology
Function and homology information


presynaptic intermediate filament cytoskeleton / mitotic recombination-dependent replication fork processing / cellular response to camptothecin / chromosome organization involved in meiotic cell cycle / telomere maintenance via telomere lengthening / positive regulation of DNA ligation / double-strand break repair involved in meiotic recombination / nuclear ubiquitin ligase complex / cellular response to hydroxyurea / replication-born double-strand break repair via sister chromatid exchange ...presynaptic intermediate filament cytoskeleton / mitotic recombination-dependent replication fork processing / cellular response to camptothecin / chromosome organization involved in meiotic cell cycle / telomere maintenance via telomere lengthening / positive regulation of DNA ligation / double-strand break repair involved in meiotic recombination / nuclear ubiquitin ligase complex / cellular response to hydroxyurea / replication-born double-strand break repair via sister chromatid exchange / lateral element / telomere maintenance via recombination / DNA recombinase assembly / regulation of DNA damage checkpoint / mitotic recombination / Impaired BRCA2 binding to PALB2 / DNA strand invasion / DNA strand exchange activity / reciprocal meiotic recombination / 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 / Homologous DNA Pairing and Strand Exchange / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / Resolution of D-loop Structures through Holliday Junction Intermediates / single-stranded DNA helicase activity / ATP-dependent DNA damage sensor activity / HDR through Single Strand Annealing (SSA) / Impaired BRCA2 binding to RAD51 / regulation of double-strand break repair via homologous recombination / nuclear chromosome / replication fork processing / Transcriptional Regulation by E2F6 / DNA unwinding involved in DNA replication / Presynaptic phase of homologous DNA pairing and strand exchange / ATP-dependent activity, acting on DNA / interstrand cross-link repair / DNA polymerase binding / condensed chromosome / meiotic cell cycle / condensed nuclear chromosome / male germ cell nucleus / cellular response to ionizing radiation / regulation of protein phosphorylation / double-strand break repair via homologous recombination / HDR through Homologous Recombination (HRR) / PML body / Meiotic recombination / site of double-strand break / single-stranded DNA binding / double-stranded DNA binding / DNA recombination / chromosome, telomeric region / mitochondrial matrix / DNA repair / centrosome / DNA damage response / chromatin binding / chromatin / nucleolus / perinuclear region of cytoplasm / enzyme binding / ATP hydrolysis activity / protein-containing complex / mitochondrion / nucleoplasm / ATP binding / identical protein binding / nucleus / cytoplasm / cytosol
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
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER / Chem-J46 / DNA / DNA repair protein RAD51 homolog 1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 2.97 Å
AuthorsZhao, L.Y. / Xu, J.F. / Wang, H.W.
Funding support China, 7items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31700654 China
National Natural Science Foundation of China (NSFC)31825009 China
National Natural Science Foundation of China (NSFC)21877069 China
National Natural Science Foundation of China (NSFC)21922704 China
National Natural Science Foundation of China (NSFC)31570754 China
National Natural Science Foundation of China (NSFC)21625302 China
National Natural Science Foundation of China (NSFC)21933010 China
CitationJournal: Nucleic Acids Res / Year: 2021
Title: Mechanisms of distinctive mismatch tolerance between Rad51 and Dmc1 in homologous recombination.
Authors: Jingfei Xu / Lingyun Zhao / Sijia Peng / Huiying Chu / Rui Liang / Meng Tian / Philip P Connell / Guohui Li / Chunlai Chen / Hong-Wei Wang /
Abstract: Homologous recombination (HR) is a primary DNA double-strand breaks (DSBs) repair mechanism. The recombinases Rad51 and Dmc1 are highly conserved in the RecA family; Rad51 is mainly responsible for ...Homologous recombination (HR) is a primary DNA double-strand breaks (DSBs) repair mechanism. The recombinases Rad51 and Dmc1 are highly conserved in the RecA family; Rad51 is mainly responsible for DNA repair in somatic cells during mitosis while Dmc1 only works during meiosis in germ cells. This spatiotemporal difference is probably due to their distinctive mismatch tolerance during HR: Rad51 does not permit HR in the presence of mismatches, whereas Dmc1 can tolerate certain mismatches. Here, the cryo-EM structures of Rad51-DNA and Dmc1-DNA complexes revealed that the major conformational differences between these two proteins are located in their Loop2 regions, which contain invading single-stranded DNA (ssDNA) binding residues and double-stranded DNA (dsDNA) complementary strand binding residues, stabilizing ssDNA and dsDNA in presynaptic and postsynaptic complexes, respectively. By combining molecular dynamic simulation and single-molecule FRET assays, we identified that V273 and D274 in the Loop2 region of human RAD51 (hRAD51), corresponding to P274 and G275 of human DMC1 (hDMC1), are the key residues regulating mismatch tolerance during strand exchange in HR. This HR accuracy control mechanism provides mechanistic insights into the specific roles of Rad51 and Dmc1 in DNA double-strand break repair and may shed light on the regulatory mechanism of genetic recombination in mitosis and meiosis.
History
DepositionApr 2, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 6, 2022Provider: repository / Type: Initial release
Revision 1.1Oct 19, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Jun 5, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
G: DNA (5'-D(P*TP*TP*TP*TP*TP*TP*TP*TP*T)-3')
A: DNA repair protein RAD51 homolog 1
C: DNA repair protein RAD51 homolog 1
B: DNA repair protein RAD51 homolog 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)116,88113
Polymers113,7174
Non-polymers3,1649
Water00
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area13670 Å2
ΔGint-105 kcal/mol
Surface area37250 Å2

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Components

#1: DNA chain DNA (5'-D(P*TP*TP*TP*TP*TP*TP*TP*TP*T)-3')


Mass: 2692.778 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)
#2: Protein DNA repair protein RAD51 homolog 1 / hRAD51 / RAD51 homolog A


Mass: 37008.074 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RAD51, RAD51A, RECA / Production host: Escherichia coli (E. coli) / References: UniProt: Q06609
#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Mg
#4: Chemical ChemComp-J46 / 4-bromanyl-N-(4-bromophenyl)-3-[(phenylmethyl)sulfamoyl]benzamide


Mass: 524.226 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C20H16Br2N2O3S / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical ChemComp-ANP / PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER


Mass: 506.196 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C10H17N6O12P3 / Comment: AMP-PNP, energy-carrying molecule analogue*YM
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: FILAMENT / 3D reconstruction method: helical reconstruction

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Sample preparation

Component
IDNameTypeDetailsEntity IDParent-IDSource
1Human RAD51 presynaptic complexCOMPLEX2.97 angstrom cryoEM structure of human RAD51 presynaptic complex#1-#20MULTIPLE SOURCES
2DNACOMPLEX#11SYNTHETIC
3Human RAD51COMPLEX#21RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Homo sapiens (human)9606
Source (recombinant)Organism: Escherichia coli (E. coli)
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: 3500 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 48 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Helical symmertyAngular rotation/subunit: 56.7 ° / Axial rise/subunit: 15.8 Å / Axial symmetry: C1
3D reconstructionResolution: 2.97 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 92403 / Symmetry type: HELICAL
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0057523
ELECTRON MICROSCOPYf_angle_d0.8210199
ELECTRON MICROSCOPYf_dihedral_angle_d12.8344524
ELECTRON MICROSCOPYf_chiral_restr0.0491170
ELECTRON MICROSCOPYf_plane_restr0.0041278

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