| 1994 |
Human RAD51 protein binds single- and double-stranded DNA, exhibits DNA-dependent ATPase activity, underwinds duplex DNA in an ATP-dependent reaction, and forms helical nucleoprotein filaments on nicked duplex DNA resembling RecA/yeast Rad51 filaments, establishing it as a functional RecA homolog. |
Protein purification, ATPase assay, topological unwinding assay, electron microscopy |
The EMBO journal |
High |
7988572
|
| 1996 |
Human RAD51 promotes ATP-dependent homologous pairing and strand exchange reactions in vitro; joint molecule formation requires ATP hydrolysis and DNA homology and is stimulated by RPA; hRad51 initiates strand exchange but requires additional proteins for extensive heteroduplex formation. |
In vitro strand exchange assay with purified proteins, ATP hydrolysis measurement |
Cell |
High |
8929543
|
| 1997 |
Human RAD51 (HsRad51) promotes homologous pairing and strand exchange at rates less than 1/10 those of RecA; in the presence of ATP-γ-S, HsRad51 forms stable presynaptic complexes and promotes renaturation but not strand exchange or homologous pairing with duplex DNA, suggesting homologous pairing and strand exchange are more closely linked to ATP hydrolysis in HsRad51 than in RecA. |
In vitro recombination assays, ATP hydrolysis assays, stoichiometry of DNA binding |
Proceedings of the National Academy of Sciences of the United States of America |
High |
9012806
|
| 1997 |
BRCA1 colocalizes with RAD51 in discrete nuclear foci during S phase and the two proteins co-immunoprecipitate; BRCA1 residues 758–1064 form RAD51-containing complexes in vitro; both proteins associate with developing synaptonemal complexes in meiotic cells, indicating a functional interaction in DNA repair and recombination. |
Co-immunoprecipitation, immunofluorescence co-localization, in vitro binding, meiotic chromosome spreads |
Cell |
High |
9008167
|
| 1997 |
RAD51 interacts specifically with the eight BRC motifs encoded in exon 11 of BRCA2; RAD51 residues 98–339 are sufficient to interact with the 59-residue minimal conserved BRC motif, mapping the molecular interface between RAD51 and BRCA2. |
Yeast two-hybrid, biochemical deletion analysis |
The Journal of biological chemistry |
High |
9405383
|
| 1997 |
BRCA2 protein physically interacts with RAD51 during mouse embryogenesis; Brca2-deficient embryos show developmental arrest and radiation hypersensitivity mediated by RAD51, indicating BRCA2 is an essential cofactor in RAD51-dependent repair of double-strand breaks. |
Co-immunoprecipitation, mouse knockout, radiation sensitivity assay |
Nature |
High |
9126738
|
| 1998 |
ATP and Mg2+ binding induces a conformational change in Rad51 detected by circular dichroism spectroscopy, producing a more structured state; this active conformation is required for DNA binding; ATP-γ-S also stabilizes activity but AMP-PNP does not, and DNA significantly increases Rad51's affinity for ATP. |
Equilibrium dialysis (nucleotide binding), circular dichroism spectroscopy, thermal inactivation assay |
Biochemistry |
High |
9718317
|
| 1998 |
BRCA2 gene product forms in vivo complexes with both p53 and RAD51 as a nuclear phosphoprotein; exogenous BRCA2 inhibits p53 transcriptional activity and RAD51 co-expression enhances this effect, placing BRCA2 at the intersection of cell cycle control and DNA repair via RAD51. |
Co-immunoprecipitation in vivo, nuclear fractionation, transcriptional reporter assay |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
9811893
|
| 1998 |
RAD51 accumulates at sites of UV-induced DNA damage in human S-phase cells and is preferentially associated with postreplicative (rather than actively replicating) chromatin, demonstrating that RAD51 redistribution to damaged chromatin occurs from pre-existing S-phase foci. |
UV microirradiation, BrdU/IdU dual-label fractionation, immunofluorescence microscopy |
The Journal of cell biology |
High |
10908572
|
| 2000 |
Human RAD51 paralogs XRCC2, XRCC3, RAD51B, RAD51C, and RAD51D form simultaneous protein interactions; yeast three-hybrid experiments show several pairs interact concurrently (e.g., RAD51B enhances RAD51C binding to XRCC3 and RAD51D); baculovirus co-expression confirms multi-subunit complex formation, suggesting these paralogs assemble into one or more complexes. |
Yeast two-hybrid, yeast three-hybrid, His-tag pull-down from baculovirus co-expression |
The Journal of biological chemistry |
High |
10749867
|
| 2000 |
Gamma-H2AX phosphorylation after DNA double-strand breaks is necessary for recruitment of RAD51 (and RAD50, BRCA1) to nuclear foci; wortmannin (PI-3 kinase inhibitor) prevents gamma-H2AX formation and abolishes RAD51 focus formation, placing PI-3 kinase signaling and H2AX upstream of RAD51 recruitment. |
Immunofluorescence, wortmannin inhibition, laser-induced DSBs in human cells |
Current biology : CB |
High |
10959836
|
| 2000 |
Mammalian Rad51 and Rad52 co-localize in distinct nuclear foci upon DNA damage in murine cells expressing GFP-Rad52; cells expressing GFP-Rad52 show increased survival and increased Rad51 foci, indicating Rad52 is limiting for Rad51-mediated repair and the two proteins function together in the DNA damage response. |
GFP-Rad52 live-cell imaging, immunofluorescence, survival assay |
EMBO reports |
Medium |
11256631
|
| 2001 |
BRCA2 plays a dual role in regulating RAD51: BRC3 and BRC4 repeats block RAD51 nucleoprotein filament formation; cancer-associated BRC3 mutations abolish this effect; additionally, BRCA2 controls nuclear import of RAD51, with a cancer-associated BRCA2 truncation causing defective nuclear RAD51 localization. |
In vitro filament formation assays, nuclear transport assays, cancer mutation analysis |
Molecular cell |
High |
11239456
|
| 2001 |
HsRad51 is required for triplex-induced intermolecular recombination between plasmid targets in human cell-free extracts; depletion of HsRad51 with specific antibodies diminishes triplex-induced recombination and supplementation with purified HsRad51 restores it. |
Cell-free extract reconstitution, antibody depletion, purified protein supplementation |
The Journal of biological chemistry |
Medium |
11278954
|
| 2002 |
Crystal structure of a BRC repeat–RAD51 RecA-homology domain complex reveals that the BRC repeat mimics the RAD51 oligomerization interface, enabling BRCA2 to control RAD51 nucleoprotein filament assembly; cancer-associated BRC mutations disrupt predicted RAD51 contacts. |
X-ray crystallography, structure-guided mutational analysis |
Nature |
High |
12442171
|
| 2002 |
Human Rad54 promotes transient strand separation in duplex DNA via ATP hydrolysis-driven DNA supercoiling; its ATPase, supercoiling, and strand-opening activities are greatly stimulated by interaction with hRad51; hRad51 and hRad54 functionally cooperate in the homologous DNA pairing reaction. |
In vitro ATPase assay, DNA supercoiling assay, strand opening assay, homologous pairing assay with purified proteins |
The Journal of biological chemistry |
High |
12205100
|
| 2002 |
FANCD2 co-localizes with RAD51 in S-phase-specific nuclear foci upon DNA damage; monoubiquitination of FANCD2 is required for this co-localization and for normal cell-cycle progression after mitomycin C exposure, placing FANCD2 in the same S-phase repair pathway as RAD51. |
Immunofluorescence co-localization, cell-cycle fractionation, FA mutant cell analysis |
Blood |
Medium |
12239151
|
| 2002 |
RPA stabilizes RAD51-generated DNA pairing intermediates in a critical postsynaptic role during strand exchange; RPA binds the displaced strand to stabilize pairing, whereas its presynaptic role in facilitating filament formation is minimal under conditions that minimize ssDNA secondary structure. |
In vitro strand exchange assay with purified Rad51 and RPA, deproteinization controls |
The Journal of biological chemistry |
High |
12169690
|
| 2003 |
Yeast DNA helicase Srs2 binds Rad51, possesses robust ssDNA-stimulated ATPase activity, and at catalytic quantities causes severe inhibition of Rad51-mediated recombination by dislodging Rad51 from ssDNA, thereby dismantling the presynaptic filament. |
In vitro ATPase assay, Rad51 filament disruption assay, pulldown |
Nature |
High |
12748644
|
| 2003 |
Rad52 forms complexes with Rad51, RPA, and Rad59; Rad51-Rad52-Rad59 and RPA-Rad52-Rad59 complexes depend on Rad52 for formation; the N-terminal Rad52 self-interaction domain is required for Rad59 interaction, implicating distinct Rad52 complexes in conservative and single-strand annealing recombination pathways. |
Co-immunoprecipitation, two-hybrid, in vitro binding |
DNA repair |
Medium |
13679150
|
| 2005 |
RAD51 focus formation in response to ionizing radiation is dependent on BRCA2 and the five RAD51 paralogs (RAD51B, RAD51C, RAD51D, XRCC2, XRCC3), whereas spontaneous S-phase RAD51 foci form without requiring these factors, revealing two distinct modes of RAD51 nuclear focus assembly. |
Immunofluorescence in paralog/BRCA2-deficient cell lines, DNA damage-induced focus assay |
Philosophical transactions of the Royal Society of London. Series B, Biological sciences |
High |
15065660
|
| 2005 |
BRCA2 BRC repeats (BRC3/BRC4) at low concentrations bind and form stable complexes with RAD51-DNA nucleoprotein filaments; BRC3 contacts the N-terminal domain of RAD51 while BRC4 contacts the nucleotide-binding core, demonstrating nonequivalent and distinct binding modes within the filament. |
Electron microscopy of RAD51-DNA filaments with BRC peptides, cryo-EM image reconstruction |
Proceedings of the National Academy of Sciences of the United States of America |
High |
15937124
|
| 2005 |
CDK-mediated phosphorylation of BRCA2 at serine 3291 during late cell cycle blocks the C-terminal BRCA2–RAD51 interaction; this phosphorylation is low in S phase when recombination is active and increases toward mitosis; DNA damage decreases S3291 phosphorylation to re-enable RAD51 binding, providing a molecular switch for recombination regulation. |
Phospho-specific antibody, cell-cycle fractionation, in vitro kinase assay, co-immunoprecipitation |
Nature |
High |
15800615
|
| 2005 |
Chk1 interacts with RAD51 and phosphorylates RAD51 on Thr309 in a Chk1-dependent manner; loss of Chk1 by siRNA or chemical inhibition abolishes RAD51 focus formation after hydroxyurea; a phosphorylation-deficient RAD51(T309A) mutant causes hydroxyurea hypersensitivity, establishing Chk1 as a regulator of RAD51-mediated homologous recombination repair. |
Co-immunoprecipitation, phospho-specific antibody, siRNA, chemical inhibitors, RAD51-T309A mutant phenotyping |
Nature cell biology |
High |
15665856
|
| 2005 |
BRCA2 and BRCA1 form a stable biochemical complex that co-localizes with RAD51 at replication sites after hydroxyurea or UV damage in S-phase cells and on synaptonemal complexes in meiosis, placing both tumor suppressors together in the same RAD51-mediated repair pathway. |
Co-immunoprecipitation, immunofluorescence co-localization, meiotic chromosome spreads |
Molecular cell |
High |
9774970
|
| 2005 |
MDC1 directly interacts with RAD51 through its forkhead-associated (FHA) domain; MDC1 knockdown impairs RAD51 focus formation after ionizing radiation, reduces nuclear and chromatin-bound RAD51, and increases RAD51 protein degradation, indicating MDC1 retains RAD51 in chromatin to facilitate homologous recombination. |
Co-immunoprecipitation, siRNA knockdown, chromatin fractionation, immunofluorescence |
Nature structural & molecular biology |
High |
16186822
|
| 2006 |
The L1 loop residue Tyr232 of human RAD51 is critical for DNA binding; alanine or conservative tryptophan substitution significantly decreases DNA-binding ability without affecting protein folding or salt-induced ATPase; fluorescence spectroscopy confirms L1 and L2 loops are positioned near the DNA-binding site. |
Site-directed mutagenesis, gel retardation assay, DNA-dependent ATPase assay, fluorescence spectroscopy |
The FEBS journal |
High |
16780572
|
| 2007 |
Both Rad51 ATPase activity and Rad54 ATPase activity are required for efficient Rad51 turnover from dsDNA (product dissociation); the Rad54 ATPase is stimulated by partial Rad51 filaments on dsDNA; the Rad51-K191R Walker-box mutant has increased filament stability and defective dsDNA binding, demonstrating that Rad51's own ATPase activity is needed for normal presynaptic and postsynaptic filament dynamics. |
In vitro ATPase kinetics, electron microscopy of filaments, Walker-box mutant analysis |
Nucleic acids research |
High |
17567608
|
| 2008 |
Human Rad51 specifically inhibits Rad52-mediated annealing of complementary ssDNA in an ATP-dependent manner via a direct Rad51–Rad52 interaction; the Rad51 nucleoprotein filament is more inhibitory than free Rad51; Rad59 partially restores Rad52-dependent annealing in the presence of Rad51, suggesting Rad51 channels repair toward strand invasion over annealing. |
In vitro ssDNA annealing assay, protein interaction analysis, ATP dependency experiments |
The Journal of biological chemistry |
High |
18337252
|
| 2008 |
Human Rad51 stimulates branch migration activity of human Rad54 through specific protein–protein interactions; the active (ATP-bound) Rad51 filament conformation is more stimulatory than the inactive form; this stimulation is evolutionarily conserved (also seen with yeast proteins), indicating Rad51 allosterically regulates Rad54's branch migration function. |
In vitro branch migration assay, protein–protein interaction analysis, yeast and human protein comparison |
The Journal of biological chemistry |
High |
18617519
|
| 2009 |
Human PSF directly interacts with RAD51 via its N-terminal region and modulates RAD51 activity in a concentration-dependent manner: PSF enhances RAD51-mediated homologous pairing and strand exchange at low RAD51 concentrations but inhibits these activities at optimal RAD51 concentrations, suggesting dual regulatory roles. |
Co-immunoprecipitation/pulldown, in vitro homologous pairing assay, strand exchange assay, deletion analysis |
Nucleic acids research |
Medium |
19447914
|
| 2010 |
Purified full-length BRCA2 binds RAD51 and stimulates RAD51-mediated recombination by: (1) targeting RAD51 to ssDNA over dsDNA, (2) enabling RAD51 to displace RPA from ssDNA, and (3) stabilizing RAD51-ssDNA filaments by blocking ATP hydrolysis. BRCA2 does not directly catalyze ssDNA annealing. |
Full-length BRCA2 purification, in vitro strand exchange assay, filament stability assay, RPA displacement assay |
Nature |
High |
20729832
|
| 2010 |
RAD51 mediates two distinct replication responses: stalled replication forks (HU short-term) are restarted in a RAD51-dependent, XRCC3-dependent manner without triggering HR; collapsed forks (prolonged HU) undergo RAD51-dependent HR repair without apparent restart, showing that restart and repair represent distinct RAD51 pathways. |
DNA fiber assay, siRNA knockdown, XRCC3 mutant cells, RAD51 focus formation |
Molecular cell |
High |
20188668
|
| 2011 |
In budding yeast, Rad51 is phosphorylated on Ser192 primarily by the checkpoint kinase Mec1 in response to DNA damage; Rad51-S192A or S192E mutations confer DNA damage hypersensitivity and HR defects; Ser192 is required for Rad51 ATPase activity and DNA binding in vitro but not for multimer formation. |
Mass spectrometry phosphosite identification, in vitro kinase assay, HR assay, ATPase assay, DNA binding assay |
EMBO reports |
High |
21738226
|
| 2014 |
HOP2-MND1 heterodimer acts as a 'molecular trigger' of RAD51 by inducing conformational changes that enhance RAD51's interaction with nucleotide cofactors, modify DNA-binding specificity, enable strand exchange without divalent metal ions, offset K133A ATP-binding mutation defects, restrict dsDNA binding during filament formation, and promote dsDNA binding during homology search. |
In vitro strand exchange assay, nucleotide binding assay, ssDNA/dsDNA binding assay with HOP2-MND1 and mutant RAD51 |
Nature communications |
High |
24943459
|
| 2015 |
RAD51-mediated replication fork reversal is a global response to diverse genotoxic treatments in human cells; electron microscopy of replication fork architecture shows uncoupling and reversal are frequent; RAD51 is present at replication forks independently of breakage; fork reversal is RAD51-dependent and antagonized by PARP/RECQ1-regulated restart. |
Electron microscopy of replication fork architecture, siRNA depletion, EM quantification of fork reversal |
The Journal of cell biology |
High |
25733714
|
| 2015 |
The C. elegans Rad51 paralog complex RFS-1/RIP-1 binds and remodels pre-synaptic RAD-51-ssDNA filaments into a stabilized, 'open,' flexible conformation in which ssDNA is more accessible and RAD-51 dissociation rate is reduced; Walker-box mutations in RFS-1 abolish filament remodeling and fail to stimulate strand exchange, demonstrating remodeling is essential for paralog function. |
Single-molecule FRET, electron microscopy, in vitro strand exchange assay, Walker-box mutagenesis |
Cell |
High |
26186187
|
| 2016 |
TOPBP1 promotes PLK1 kinase-mediated phosphorylation of RAD51 at serine 14, a modification required for RAD51 recruitment to chromatin and focus formation; TOPBP1 BRCT domains 7/8 are essential for RAD51 foci; TOPBP1 depletion abrogates RAD51 chromatin loading without affecting upstream resection or RPA loading. |
siRNA screen, phospho-specific antibody, in vitro kinase assay, chromatin fractionation, BRCT mutants |
The Journal of cell biology |
High |
26811421
|
| 2016 |
The MMS22L-TONSL heterodimer localizes to replication forks, associates with RPA-coated ssDNA, and directly interacts with RAD51 via MMS22L; recombinant MMS22L-TONSL limits RAD51 assembly on dsDNA, stimulating RAD51-ssDNA filament formation and strand exchange; MMS22L-RAD51 interaction is required for proper RAD51 focus assembly and HR-mediated fork restart. |
Co-immunoprecipitation, in vitro strand exchange assay with purified proteins, mutant cell analysis, iPOND replication fork proteomics |
The EMBO journal |
High |
27797818
|
| 2017 |
Human RAD52 binds tightly to RPA-ssDNA complexes and inhibits RPA turnover; during presynaptic complex assembly, RAD51 displaces most RAD52-RPA from ssDNA; once RAD51 is assembled, it restricts new RAD52 binding events, revealing reciprocal regulation between RAD51 and RAD52 at the presynaptic filament. |
Single-molecule imaging, ssDNA curtains, TIRF microscopy |
The Journal of biological chemistry |
High |
28551686
|
| 2017 |
Srs2 is a processive translocase that strips Rad51 monomers from ssDNA at ~50 monomers/second; Srs2 is recruited to RPA clusters embedded within Rad51 filaments; multi-Srs2 arrays form via iterative loading; Srs2 disrupts heteroduplex DNA joints through two alternative pathways, establishing the mechanism of Srs2-mediated anti-recombination. |
Single-molecule fluorescence imaging (ssDNA curtains), TIRF microscopy |
Cell reports |
High |
29241544
|
| 2018 |
RADX antagonizes RAD51 at stalled replication forks by competing with RAD51 for ssDNA binding; silencing RADX restores fork protection in BRCA1/2-, FANCA-, FANCD2-, or BOD1L-deficient cells; RADX overexpression causes fork degradation dependent on MRE11 and DNA2 and fork reversal, establishing that the RAD51/RADX balance determines stalled fork fate. |
DNA fiber assay, siRNA, RADX overexpression, iPOND, fork protection assays |
Cell reports |
High |
30021152
|
| 2018 |
In budding yeast, Rad52–Rad51 protein interaction is dispensable for Rad51 filament formation and gene conversion but is essential for protecting Rad51 filaments against dissociation by Srs2 DNA translocase, revealing a filament-protection function of Rad52–Rad51 association independent of mediator activity. |
Rad52 interaction-deficient mutants, in vitro Srs2-disruption assay, in vivo gene conversion assay, electron microscopy |
eLife |
High |
29985128
|
| 2018 |
Rad51 and Dmc1 have an intrinsic ability to self-segregate in mixed filaments on ssDNA, even without accessory proteins; Dmc1 stabilizes adjacent Rad51 filament segments, suggesting the two meiotic recombinases form spatially distinct but cross-stabilizing filament domains. |
Single-molecule imaging (ssDNA curtains), co-visualization of labeled Rad51 and Dmc1 |
The Journal of biological chemistry |
High |
29382724
|
| 2020 |
RADX condenses RPA-coated ssDNA filaments via higher-order assemblies that can capture ssDNA in trans; RADX blocks RPA displacement by RAD51 and prevents RAD51 loading on ssDNA, establishing RADX as an ssDNA condensation protein that inhibits RAD51 filament formation. |
Single-molecule imaging of RADX on RPA-ssDNA, TIRF microscopy, RAD51 loading assay |
Nucleic acids research |
High |
32621611
|
| 2021 |
RADX directly and selectively interacts with ATP-bound RAD51, stimulates RAD51 ATP hydrolysis, and destabilizes RAD51 nucleofilaments, inhibiting strand exchange and D-loop formation; RADX ssDNA-binding capability plus its RAD51 interaction are both required for maintaining replication fork elongation and stability; BRCA2 can overcome RADX-mediated RAD51 inhibition. |
In vitro strand exchange assay, ATPase assay, RAD51 filament stability assay, DNA fiber assay, RADX–RAD51 interaction mapping |
Molecular cell |
High |
33453169
|
| 2021 |
HELQ helicase activity is strongly stimulated by RAD51 (which forms a complex with HELQ) during DNA unwinding; conversely, RPA inhibits HELQ unwinding but stimulates a previously unappreciated HELQ DNA strand annealing activity; HELQ can capture RPA-bound DNA strands and displace RPA to facilitate annealing. |
In vitro helicase and annealing assays, single-molecule imaging, biochemical co-complex analysis |
Nature |
High |
34937945
|
| 2021 |
The HsRAD51B-HsRAD51C heterodimer forms stable complexes on ssDNA and partially stabilizes the HsRAD51 nucleoprotein filament against BLM-mediated disruption; it stimulates HsRAD51-mediated D-loop formation in the presence of RPA but does not facilitate HsRAD51 nucleation on RPA-coated ssDNA, placing RAD51B-C function downstream of BRCA2 in filament stabilization during the presynaptic phase. |
In vitro filament stability assay, D-loop assay, ssDNA binding assay with purified proteins |
DNA repair |
Medium |
23810717
|
| 2021 |
Conditional knockout of RAD51 in mouse germ cells (Vasa-Cre) causes spermatogonial loss and Sertoli cell-only syndrome; inducible adult knockout causes meiotic DSB accumulation, reduced pachytene spermatocytes, and fewer crossovers, establishing an essential role for RAD51 in spermatogonial maintenance and meiotic DSB repair. |
Conditional mouse knockout (Vasa-Cre and UBC-CreERT2), γH2AX staining, crossover quantification |
Cell death discovery |
High |
35292640
|
| 2022 |
TOPORS acts as a SUMO E3 ligase for RAD51, SUMOylating RAD51 at lysines 57 and 70 in response to DNA damage; SUMOylation is facilitated by ATM-induced phosphorylation of TOPORS at Thr515; SUMOylation-deficient RAD51 (K57R/K70R) reduces chromatin loading, RAD51 focus formation, and association with BRCA2, impairing HR repair. |
SUMO modification assay, phospho-specific antibody, SUMOylation-deficient mutants, co-immunoprecipitation, HR reporter assay |
Nucleic acids research |
High |
35061896
|
| 2022 |
RAD51 Cys319 is a redox-sensitive residue regulated by PRDX1; oxidation of Cys319 (sulfenylation) impairs irradiation-induced RAD51 focus formation and HR; PRDX1 maintains Cys319 in a reduced state; molecular dynamics simulations show that oxidized Cys319 causes dissociation of DNA from the RAD51 filament. |
Phospho/sulfenylation probes, PRDX1-deficient cells, RAD51-C319 mutagenesis, molecular dynamics simulation, PARP inhibitor sensitivity |
Redox biology |
High |
36058112
|
| 2023 |
Cryo-EM structure of the BRCA2 TR2 motif bound to the human RAD51 nucleoprotein filament reveals TR2 binds across the protomer interface, acting as a brace for adjacent RAD51 molecules; TR2 targets an acidic-patch motif on RAD51 that also serves as a recruitment hub for recombination mediators in fission yeast. |
Cryo-electron microscopy, structure-guided mutagenesis |
Nature communications |
High |
37919288
|
| 2023 |
Cryo-EM structures of human RAD51-DNA and DMC1-DNA complexes reveal that the Loop2 region (containing ssDNA and complementary strand binding residues) differs between RAD51 and DMC1; RAD51 residues V273 and D274 (vs. P274 and G275 in DMC1) are key determinants of mismatch intolerance during strand exchange, explaining RAD51's high fidelity compared to DMC1's mismatch tolerance. |
Cryo-EM structure determination, molecular dynamics simulation, single-molecule FRET, mutagenesis |
Nucleic acids research |
High |
34871438
|
| 2023 |
RAD51 uses its strand exchange activity to bypass the replicative helicase (CMG) that remains bound at stalled replication forks; when CMG is unloaded, RAD51 is no longer required for fork reversal; RAD51 creates a parental DNA duplex behind the helicase that DNA translocases then use as substrate for branch migration to generate a reversed fork. |
Auxin-inducible degron to acutely deplete CMG, DNA fiber assay, EM of replication forks, RAD51 strand exchange mutants |
Science (New York, N.Y.) |
High |
37104614
|
| 2023 |
BRCA2 chaperones a short preassembled RAD51 filament onto RPA-coated ssDNA; a dimer of RAD51 is the minimal unit for spontaneous nucleation but growth self-terminates below diffraction limit; BRCA2 accelerates RAD51 nucleation to rates approaching binding to naked ssDNA, eliminating the kinetic barrier imposed by RPA. |
Single-molecule microfluidics with full-length BRCA2, direct visualization of RAD51 filament assembly on RPA-ssDNA |
Proceedings of the National Academy of Sciences of the United States of America |
High |
36976771
|
| 2023 |
Human centromeres harbor enrichment of DNA breaks that occur during both proliferation and quiescence; centromere DNA breaks in quiescent cells are resolved by the RAD51 recombinase, which safeguards functional centromere specification. |
Single-cell imaging of DNA breaks at repetitive centromere regions, RAD51 depletion, centromere function assay |
Molecular cell |
Medium |
36702125
|
| 2023 |
Functionally tagged Rad51 in budding yeast forms exceedingly long nucleoprotein filaments spanning the entire nucleus after DSB induction; filaments adopt dynamic compaction-extension cycles modulated by Rad54 (promoting compaction) and Srs2 (promoting extension/disassembly); biophysical modeling shows this dynamics constitutes a robust homology search strategy. |
Live-cell single-molecule imaging with functional tagged Rad51, biophysical modeling, DSB induction |
Nature structural & molecular biology |
High |
37605042
|
| 2024 |
RAD51 nucleofilaments specifically recognize and protect abasic sites in ssDNA (which increase RAD51's DNA association rate); in the absence of BRCA2 or RAD51, abasic ssDNA gaps accumulate making replicating DNA sensitive to APE1; RAD51 assembled on abasic DNA prevents cleavage by the MRE11-RAD50 complex, suppressing replication fork breakage. |
Cryo-EM of RAD51 on abasic DNA, Xenopus egg extract assays, human cell experiments, APE1/MRE11 cleavage assays |
Molecular cell |
High |
39178838
|