- EMDB-19253: Human RAD52 open ring - ssDNA complex -
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基本情報
登録情報
データベース: EMDB / ID: EMD-19253
タイトル
Human RAD52 open ring - ssDNA complex
マップデータ
Sharpen by DeepEMhancer
試料
複合体: Open ring conformation of human RAD52 in complex with ssDNA
タンパク質・ペプチド: DNA repair protein RAD52 homolog
DNA: ssDNA
リガンド: MAGNESIUM ION
リガンド: water
キーワード
ssDNA binding protein / DNA damage repair / Single-strand annealing / DNA BINDING PROTEIN
機能・相同性
機能・相同性情報
double-strand break repair via single-strand annealing / DNA double-strand break processing involved in repair via single-strand annealing / DNA recombinase assembly / mitotic recombination / regulation of nucleotide-excision repair / HDR through MMEJ (alt-NHEJ) / HDR through Single Strand Annealing (SSA) / SUMOylation of DNA damage response and repair proteins / double-strand break repair via homologous recombination / protein-DNA complex ...double-strand break repair via single-strand annealing / DNA double-strand break processing involved in repair via single-strand annealing / DNA recombinase assembly / mitotic recombination / regulation of nucleotide-excision repair / HDR through MMEJ (alt-NHEJ) / HDR through Single Strand Annealing (SSA) / SUMOylation of DNA damage response and repair proteins / double-strand break repair via homologous recombination / protein-DNA complex / double-strand break repair / single-stranded DNA binding / cellular response to oxidative stress / DNA recombination / protein-containing complex / DNA binding / nucleoplasm / identical protein binding / nucleus 類似検索 - 分子機能
DNA recombination/repair protein Rad52 / DNA repair protein Rad52/59/22 / Rad52 family / DNA repair protein Rad52/59/22 superfamily / Rad52/22 family double-strand break repair protein 類似検索 - ドメイン・相同性
Biotechnology and Biological Sciences Research Council (BBSRC)
BB/W01355X/1
英国
Louis-Jeantet Foundation
スイス
Wellcome Trust
206175/Z/17/Z
英国
引用
ジャーナル: Nature / 年: 2024 タイトル: Mechanism of single-stranded DNA annealing by RAD52-RPA complex. 著者: Chih-Chao Liang / Luke A Greenhough / Laura Masino / Sarah Maslen / Ilirjana Bajrami / Marcel Tuppi / Mark Skehel / Ian A Taylor / Stephen C West / 要旨: RAD52 is important for the repair of DNA double-stranded breaks, mitotic DNA synthesis and alternative telomere length maintenance. Central to these functions, RAD52 promotes the annealing of ...RAD52 is important for the repair of DNA double-stranded breaks, mitotic DNA synthesis and alternative telomere length maintenance. Central to these functions, RAD52 promotes the annealing of complementary single-stranded DNA (ssDNA) and provides an alternative to BRCA2/RAD51-dependent homologous recombination repair. Inactivation of RAD52 in homologous-recombination-deficient BRCA1- or BRCA2-defective cells is synthetically lethal, and aberrant expression of RAD52 is associated with poor cancer prognosis. As a consequence, RAD52 is an attractive therapeutic target against homologous-recombination-deficient breast, ovarian and prostate cancers. Here we describe the structure of RAD52 and define the mechanism of annealing. As reported previously, RAD52 forms undecameric (11-subunit) ring structures, but these rings do not represent the active form of the enzyme. Instead, cryo-electron microscopy and biochemical analyses revealed that ssDNA annealing is driven by RAD52 open rings in association with replication protein-A (RPA). Atomic models of the RAD52-ssDNA complex show that ssDNA sits in a positively charged channel around the ring. Annealing is driven by the RAD52 N-terminal domains, whereas the C-terminal regions modulate the open-ring conformation and RPA interaction. RPA associates with RAD52 at the site of ring opening with critical interactions occurring between the RPA-interacting domain of RAD52 and the winged helix domain of RPA2. Our studies provide structural snapshots throughout the annealing process and define the molecular mechanism of ssDNA annealing by the RAD52-RPA complex.
全体 : Open ring conformation of human RAD52 in complex with ssDNA
全体
名称: Open ring conformation of human RAD52 in complex with ssDNA
要素
複合体: Open ring conformation of human RAD52 in complex with ssDNA
タンパク質・ペプチド: DNA repair protein RAD52 homolog
DNA: ssDNA
リガンド: MAGNESIUM ION
リガンド: water
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超分子 #1: Open ring conformation of human RAD52 in complex with ssDNA
超分子
名称: Open ring conformation of human RAD52 in complex with ssDNA タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#2 詳細: Recombinant RAD52 purified from E. coli, and the open ring conformation was separated by cation exchange. The RAD52-ssDNA complex was reconstituted in vitro.
由来(天然)
生物種: Homo sapiens (ヒト)
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分子 #1: DNA repair protein RAD52 homolog
分子
名称: DNA repair protein RAD52 homolog / タイプ: protein_or_peptide / ID: 1 / コピー数: 9 / 光学異性体: LEVO