Map of yeast Rad51-ssDNA filament bound to ADP-AlF3
試料
複合体: yeast Rad51 in complex with ssDNA and ADP-aluminium fluoride
DNA: DNA (5'-D(P*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*TP*T)-3')
タンパク質・ペプチド: DNA repair protein RAD51
リガンド: ADENOSINE-5'-DIPHOSPHATE
リガンド: ALUMINUM FLUORIDE
リガンド: MAGNESIUM ION
キーワード
genome stability / recombination / Rad51 / DNA repair / DNA BINDING PROTEIN / DNA BINDING PROTEIN-DNA complex
機能・相同性
機能・相同性情報
Presynaptic phase of homologous DNA pairing and strand exchange / heteroduplex formation / meiotic joint molecule formation / mitochondrial chromosome / mitotic recombination-dependent replication fork processing / DNA recombinase assembly / chromosome organization involved in meiotic cell cycle / DNA strand invasion / mitotic recombination / DNA strand exchange activity ...Presynaptic phase of homologous DNA pairing and strand exchange / heteroduplex formation / meiotic joint molecule formation / mitochondrial chromosome / mitotic recombination-dependent replication fork processing / DNA recombinase assembly / chromosome organization involved in meiotic cell cycle / DNA strand invasion / mitotic recombination / DNA strand exchange activity / telomere maintenance via recombination / reciprocal meiotic recombination / mitochondrial DNA repair / ATP-dependent DNA damage sensor activity / nuclear chromosome / ATP-dependent activity, acting on DNA / condensed nuclear chromosome / nucleotide-excision repair / double-strand break repair via homologous recombination / G2/M transition of mitotic cell cycle / double-strand break repair / single-stranded DNA binding / double-stranded DNA binding / DNA recombination / mitochondrial matrix / DNA binding / ATP binding / identical protein binding 類似検索 - 分子機能
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 類似検索 - ドメイン・相同性
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM58015
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM137751
米国
National Institutes of Health/National Cancer Institute (NIH/NCI)
P30CA093373
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
U24 GM129541
米国
引用
ジャーナル: Nucleic Acids Res / 年: 2025 タイトル: Local structural dynamics of Rad51 protomers revealed by cryo-electron microscopy of Rad51-ssDNA filaments. 著者: Jie Liu / Steven K Gore / Wolf-Dietrich Heyer / 要旨: Homologous recombination (HR) is a high-fidelity repair mechanism for double-strand breaks. Rad51 is the key enzyme that forms filaments on single-stranded DNA (ssDNA) to catalyze homology search and ...Homologous recombination (HR) is a high-fidelity repair mechanism for double-strand breaks. Rad51 is the key enzyme that forms filaments on single-stranded DNA (ssDNA) to catalyze homology search and DNA strand exchange in recombinational DNA repair. In this study, we employed single-particle cryogenic electron microscopy (cryo-EM) to ascertain the density map of the wild-type budding yeast Rad51-ssDNA filament bound to ADP-AlF3, achieving a resolution of 2.35 Å without imposing helical symmetry. The model assigned 6 Rad51 protomers, 24 nt of DNA, and 6 bound ADP-AlF3. It shows 6-fold symmetry implying monomeric building blocks, unlike the structure of the Rad51-I345T mutant filament with three-fold symmetry implying dimeric building blocks, for which the structural comparisons provide a satisfying mechanistic explanation. This image analysis enables comprehensive comparisons of individual Rad51 protomers within the filament and reveals local conformational movements of amino acid side chains. Notably, R293 in Loop 1 adopts multiple conformations to facilitate L296 and V331 in separating and twisting the DNA triplets. We also analyzed the crystal structure of Rad51-I345T and the predicted structure of yeast Rad51-K342E using the Rad51-ssDNA structure from this study as a reference.