| 2000 |
RAD51D (RAD51L3) possesses single-stranded DNA binding activity and DNA-stimulated ATPase activity, consistent with Walker box motifs in its sequence, and forms a direct heterodimeric complex with XRCC2 in human cells, as demonstrated by purification of the recombinant protein and co-immunoprecipitation. |
Protein purification, in vitro ATPase assay, ssDNA binding assay, co-immunoprecipitation |
The Journal of biological chemistry |
High |
10871607
|
| 2002 |
The purified human XRCC2·RAD51D complex catalyzes homologous pairing between single-stranded and double-stranded DNA, forms multimeric ring structures in the absence of DNA, and assembles into filamentous structures on ssDNA, similar to other homologous pairing proteins. |
Recombinant protein co-expression and purification in E. coli, in vitro homologous pairing assay, electron microscopy |
The Journal of biological chemistry |
High |
11834724
|
| 2003 |
BLM helicase makes a direct physical interaction with RAD51D (RAD51L3) through the N-terminal domain of BLM, and the RAD51D-XRCC2 complex stimulates BLM to disrupt synthetic 4-way (Holliday junction) structures in a manner dependent on direct physical association between BLM and RAD51D. |
Protein purification, in vitro Holliday junction disruption assay, co-immunoprecipitation, domain-mapping with BLM truncation mutants |
The Journal of biological chemistry |
High |
12975363
|
| 2004 |
The RAD51B-RAD51C-RAD51D-XRCC2 (BCDX2) complex preferentially binds to branched DNA substrates (Y-shaped DNA and synthetic Holliday junctions) over linear ssDNA or dsDNA, and catalyzes strand-annealing between long complementary ssDNA molecules. |
Competitive DNA-binding assays with purified BCDX2 complex using seven DNA substrate types, strand-annealing assay |
Nucleic acids research |
High |
15141025
|
| 2004 |
RAD51D localizes to telomeres in both meiotic and somatic cells; Rad51d-deficient mouse embryonic fibroblasts exhibit telomeric DNA repeat shortening, elevated chromosomal end-to-end fusions, and siRNA-mediated depletion in telomerase-negative human cells also causes telomere erosion and chromosome fusion, establishing a dual role for RAD51D in DNA double-strand break repair and telomere maintenance. |
Immunofluorescence labeling, electron microscopy, chromatin immunoprecipitation, siRNA knockdown, cytogenetic analysis |
Cell |
High |
15109494
|
| 2005 |
Rad51d-deficient mouse embryonic fibroblasts (in p53-null background) are sensitive to DNA-damaging agents, exhibit extensive chromosome instability (aneuploidy, fragments, complex rearrangements), increased centrosome fragmentation, reduced radiation-induced RAD51 focus formation, and fail to increase sister chromatid exchange in response to mitomycin C, demonstrating RAD51D is required for RAD51 recruitment and homologous recombination repair. |
Knockout mouse model, cell survival assays, cytogenetic analysis, immunofluorescence for RAD51 foci, sister chromatid exchange assay |
Cancer research |
High |
15781618
|
| 2005 |
The Walker A (ATP binding) motif of RAD51D is required for efficient homologous recombination repair of DNA interstrand crosslinks; Walker A mutations K113R and K113A reduce repair capacity by 83–96% and diminish interaction with RAD51C (8-fold reduction) while retaining interaction with XRCC2. |
Site-directed mutagenesis, complementation in Rad51d-deficient MEFs, yeast two-hybrid analysis |
Mutagenesis |
High |
16236763
|
| 2006 |
The Walker B ATPase motif of RAD51D is required for interactions with XRCC2 and RAD51C and for efficient homologous recombinational repair, whereas the Walker A motif is not required for these interactions or complementation of crosslink sensitivity; ATPase sites are proposed to form in a bipartite manner between RAD51D and other paralogs. |
ATPase motif mutagenesis, complementation in rad51d knockout CHO cells, yeast two- and three-hybrid assays, co-immunoprecipitation |
Nucleic acids research |
High |
16717288
|
| 2006 |
RAD51D-deficient CHO cells exhibit a 12-fold increased rate of hprt mutation and 4–10-fold increased gene amplification at dhfr and CAD loci, as well as elevated spontaneous chromatid breaks, demonstrating that RAD51D-mediated homologous recombination acts in an error-free manner to suppress multiple classes of genetic alterations. |
Rad51d knockout CHO cells, hprt mutation assay, gene amplification assay, cytogenetic analysis |
Nucleic acids research |
High |
16522646
|
| 2009 |
SFPQ/PSF interacts directly with RAD51D (and also RAD51C and XRCC2) as identified by proteomics; depletion of both SFPQ and RAD51D results in a synthetic lethal relationship. SFPQ deficiency alone leads to sister chromatid cohesion defects and chromosome instability, and mediates homology-directed DNA repair. |
Proteomics screen, direct protein interaction assay, siRNA knockdown, cell viability assay, chromosome instability analysis, sister chromatid cohesion assay |
Nucleic acids research |
Medium |
20813759
|
| 2009 |
The RAD51D E233G variant decreases interaction with RAD51C by ~2-fold while maintaining normal XRCC2 interaction, increases cellular resistance to multiple DNA-damaging agents, reduces anaphase bridge index, and increases proliferation. Molecular modeling suggests glutamic acid-233 forms a salt bridge with lysine-23 in the RAD51D N-terminal domain that is disrupted by the glycine substitution. |
Yeast two-hybrid, complementation in Rad51d-deficient MEFs, cell survival assays, molecular modeling |
Pharmacogenetics and genomics |
Medium |
19033885
|
| 2010 |
RAD51D protects cells from MLH1-dependent cytotoxicity induced by O6-methylguanine: Rad51d-deficient cells are 5.3-fold sensitive to MNNG, with G2/M arrest and apoptosis; loss of Mlh1 alleviates this sensitivity, demonstrating that RAD51D-mediated homologous recombination acts downstream of MMR to resolve recombinogenic intermediates created by MMR recognition of O6-meG:T mismatches. |
Genetic epistasis using Rad51d/Mlh1/Trp53 triple-knockout MEFs, MNNG sensitivity assay, γ-H2AX measurement, cell cycle analysis, apoptosis assay |
DNA repair |
High |
20133210
|
| 2010 |
The NMR solution structure of the human RAD51D N-terminal domain (residues 1-83) consists of four short helices flanked by N- and C-terminal tails, with the N-terminal tail fixed by hydrophobic interactions (Leu4/Thr27, Leu4/Val28, Val6/Ile17). The domain preferentially binds ssDNA over dsDNA and does not bind mobile Holliday junctions, with NMR titration identifying positively charged and hydrophobic surface residues for ssDNA binding. |
NMR structure determination, EMSA (ssDNA vs dsDNA binding), NMR titration |
The international journal of biochemistry & cell biology |
High |
21111057
|
| 2011 |
RAD51D-deficient cells are extremely sensitive to 6-thioguanine; this sensitivity is almost completely rescued by deletion of Mlh1, establishing that RAD51D-mediated homologous recombination acts downstream of MLH1-dependent mismatch repair to resolve 6-thioG-induced recombinogenic lesions. Rad51d-deficient cells also show markedly increased triradial and quadriradial chromosomal aberrations after 6-thioG treatment. |
Genetic epistasis with Rad51d/Mlh1 double-knockout cells, 6-thioG sensitivity assay, cytogenetic analysis |
Molecular cancer research : MCR |
High |
21205838
|
| 2016 |
RNF138 E3 ubiquitin ligase directly interacts with and ubiquitinates RAD51D; RNF138 depletion increases RAD51D protein stability, reduces RAD51 focus formation, and causes sensitivity to DNA-damaging agents and chromosome instability. The RNF138 RING finger domain is required for RAD51D ubiquitination, and RNF138 presence enhances the RAD51D-XRCC2 interaction. |
Co-immunoprecipitation, ubiquitination assay, siRNA depletion, RAD51 foci assay, RING domain mutagenesis, yeast three-hybrid |
DNA repair |
High |
27161866
|
| 2016 |
Ubiquitylation of Rad51D by RNF138 promotes homologous recombination repair: RNF138 is recruited to DNA damage sites via its zinc finger domains, is phosphorylated by ATM at Ser124 (though this phosphorylation is dispensable for recruitment), and directly interacts with RAD51D; RNF138 depletion delays and destabilizes RAD51D recruitment to damage sites and reduces HR efficiency. |
Live cell imaging, co-immunoprecipitation, siRNA depletion, HR reporter assay, comet assay |
PloS one |
Medium |
27195665
|
| 2017 |
The RAD51D missense variant p.S207L disrupts the RAD51D-XRCC2 protein-protein interaction and impairs homologous recombination, conferring PARP inhibitor sensitivity; this highlights the RAD51D-XRCC2 interaction as critical for HR function and tumor suppression. |
Case-control genotyping, yeast two-hybrid interaction assay, HR assay, PARP inhibitor sensitivity assay in patient-derived cells |
Cancer research |
Medium |
28646019
|
| 2017 |
RAD51D deficiency shifts DSB repair from homologous recombination-mediated gene conversion toward single-strand annealing (SSA) and end-joining pathways, resulting in an exceptionally high frequency of large chromosomal deletions surrounding site-specific DSBs; deletions near the break are due to NHEJ while larger deletions use SSA. |
HR reporter assay at endogenous Aprt locus, I-SceI-induced DSBs, loss-of-function RAD51D-deficient CHO cells, deletion mapping |
Nucleic acids research |
High |
27924006
|
| 2017 |
RAD51D is required for maintaining telomeric 3' overhangs; Rad51d-deficient cells show increased γ-H2AX localization at telomeres following 6-thioguanine treatment and undergo mitotic catastrophe (failed division and restitution) leading to multinucleated cell formation. |
γ-H2AX foci assay with telomere co-localization, live-cell imaging of mitotic catastrophe, Rad51d-deficient cells |
Environmental and molecular mutagenesis |
Medium |
28945288
|
| 2019 |
RAD51D isoform 1 is the functional isoform for HR; isoform 4 (large N-terminal deletion including Walker A motif) and isoform 6 (alternate N-terminal exon) are non-functional. Cancer-associated mutations G96C and G107V near/within the Walker A motif independently disrupt RAD51D interaction with XRCC2, reduce HR efficiency in a sister chromatid recombination reporter assay, and the RAD51D-XRCC2 interaction is required for DSB repair. |
Yeast two-hybrid and three-hybrid, co-immunoprecipitation, sister chromatid recombination HR reporter assay in RAD51D knockout U2OS cells, functional complementation |
DNA repair |
High |
30836272
|
| 2023 |
Cryo-EM, AlphaFold2 modeling, and structural proteomics reveal that in the BCDX2 complex, RAD51C-RAD51D-XRCC2 mimics three RAD51 protomers aligned within a nucleoprotein filament while RAD51B is highly dynamic. BCDX2 stimulates nucleation and extension of RAD51 filaments on ssDNA in reactions dependent on the coupled ATPase activities of RAD51B and RAD51C, establishing that BCDX2 orchestrates RAD51 assembly for replication fork protection and double-strand break repair. |
Cryo-electron microscopy, AlphaFold2 structural modeling, structural proteomics, single-molecule analysis, biochemical RAD51 filament assembly assays, ATPase assays |
Nature |
High |
37344587
|
| 2022 |
YTHDF3 mediates translation of RAD51D mRNA in an m6A-dependent manner downstream of HNF1α transcriptional upregulation of YTHDF3; HNF1α positively regulates RAD51D at the protein level but not mRNA level, and this HNF1α/YTHDF3/RAD51D axis promotes radioresistance in cervical cancer cells. |
Depletion/overexpression of HNF1α and YTHDF3, western blotting (protein vs. mRNA level distinction), in vitro and in vivo irradiation assays |
The FEBS journal |
Medium |
36380687
|
| 2026 |
Cryo-EM reveals two distinct heterotetrameric RAD51 paralog complexes: RAD51B-RAD51C-RAD51D-XRCC2 (RAD51B complex) and XRCC3-RAD51C-RAD51D-XRCC2 (XRCC3 complex). The RAD51B complex promotes dynamic ATP hydrolysis-dependent RAD51 filament assembly, while the XRCC3 complex stably caps the 5' termini of RAD51 filaments to promote homologous pairing, with RAD51C-RAD51D-XRCC2 shared between both complexes. |
Cryo-electron microscopy, biochemical filament assembly assays, single-molecule visualization |
Science (New York, N.Y.) |
High |
41196948
|
| 2026 |
A high-throughput multiplex assay of 6,888 RAD51D coding variants identifies that variants in the DNA-binding or ATPase core most severely compromise HR. The RAD51D-RAD51C interface within the BCDX2 complex is essential for regulating ATPase activity, and paradoxically, the primary function of RAD51D appears to be slowing the ATPase activity of BCDX2 to allow sufficient time for RAD51 filament assembly. |
Multiplex assay of variant effect (saturation genome editing), orthogonal HR and biochemical assays across 70 clinical variants, ATPase activity assays |
bioRxiv : the preprint server for biologypreprint |
Medium |
41542474
|
| 2024 |
Using yeast two-hybrid and three-hybrid approaches, RAD51 paralogs (including RAD51D as part of BCDX2) interact with BRCA2 at two distinct hubs: the BRC repeats (BRC1-2) and the DNA binding domain. RAD51D is part of the BCDX2 complex that interacts with BRCA2 BRC repeats. |
Yeast two-hybrid, yeast three-hybrid, co-immunoprecipitation |
bioRxivpreprint |
Low |
bio_10.1101_2024.10.10.617680
|
| 2000 |
Rad51d-deficient mouse embryos die between 8.5–11.5 dpc with posterior truncation and developmental delay; embryonic fibroblasts cannot be propagated, demonstrating that RAD51D is essential for normal mammalian development, consistent with a role in recombinational DNA repair during mitosis. |
Gene targeting/knockout in mice, embryo phenotyping, primary fibroblast culture |
Genesis (New York, N.Y. : 2000) |
High |
10705376
|
| 2011 |
RAD51D-deficient cells are sensitive to PARP inhibitor treatment, demonstrating that RAD51D function in homologous recombination is required for resistance to PARP inhibition. |
PARP inhibitor sensitivity assay in RAD51D-deficient cells (inferred from clinical genetics paper describing PARP inhibitor sensitivity in RAD51D-deficient cells) |
Nature genetics |
Medium |
21822267
|
| 2009 |
Mouse RAD51D splice variant RAD51DDelta7b (deleted for residues 219–223) retains interaction with both RAD51C and XRCC2, while RAD51D+int3 retains interaction with XRCC2 only. The linker region (residues 54–77) of RAD51D was identified as a region mediating binding with XRCC2. None of the splice variants restore resistance to mitomycin C in Rad51d-deficient cells. |
Yeast two-hybrid, EGFP fusion localization, complementation assay, RT-PCR |
BMC molecular biology |
Medium |
19327148
|