+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8vx4 | |||||||||
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タイトル | Human OGG1 bound to a 35-bp DNA with an 8-oxoG in the middle | |||||||||
要素 |
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キーワード | HYDROLASE / LYASE/DNA / Human OGG1 binding at 8-oxoG of a 35 bp DNA duplex / LYASE-DNA complex | |||||||||
機能・相同性 | 機能・相同性情報 Defective OGG1 Substrate Binding / Defective OGG1 Substrate Processing / Defective OGG1 Localization / negative regulation of double-strand break repair via single-strand annealing / depurination / oxidized purine nucleobase lesion DNA N-glycosylase activity / base-excision repair, AP site formation / depyrimidination / 8-oxo-7,8-dihydroguanine DNA N-glycosylase activity / Displacement of DNA glycosylase by APEX1 ...Defective OGG1 Substrate Binding / Defective OGG1 Substrate Processing / Defective OGG1 Localization / negative regulation of double-strand break repair via single-strand annealing / depurination / oxidized purine nucleobase lesion DNA N-glycosylase activity / base-excision repair, AP site formation / depyrimidination / 8-oxo-7,8-dihydroguanine DNA N-glycosylase activity / Displacement of DNA glycosylase by APEX1 / positive regulation of gene expression via chromosomal CpG island demethylation / response to folic acid / oxidized purine DNA binding / 加水分解酵素; 糖加水分解酵素; N-グリコシル化合物加水分解酵素 / APEX1-Independent Resolution of AP Sites via the Single Nucleotide Replacement Pathway / response to light stimulus / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / cellular response to cadmium ion / class I DNA-(apurinic or apyrimidinic site) endonuclease activity / DNA-(apurinic or apyrimidinic site) lyase / nucleotide-excision repair / base-excision repair / response to radiation / nuclear matrix / cellular response to reactive oxygen species / response to estradiol / microtubule binding / endonuclease activity / response to ethanol / response to oxidative stress / damaged DNA binding / nuclear speck / mitochondrial matrix / response to xenobiotic stimulus / RNA polymerase II cis-regulatory region sequence-specific DNA binding / DNA damage response / regulation of DNA-templated transcription / negative regulation of apoptotic process / enzyme binding / positive regulation of transcription by RNA polymerase II / protein-containing complex / DNA binding / nucleoplasm / nucleus / cytosol 類似検索 - 分子機能 | |||||||||
生物種 | Homo sapiens (ヒト) synthetic construct (人工物) | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.7 Å | |||||||||
データ登録者 | You, Q. / Li, H. | |||||||||
資金援助 | 米国, 2件
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引用 | ジャーナル: Commun Biol / 年: 2024 タイトル: Human 8-oxoguanine glycosylase OGG1 binds nucleosome at the dsDNA ends and the super-helical locations. 著者: Qinglong You / Xiang Feng / Yi Cai / Stephen B Baylin / Huilin Li / 要旨: The human glycosylase OGG1 extrudes and excises the oxidized DNA base 8-oxoguanine (8-oxoG) to initiate base excision repair and plays important roles in many pathological conditions such as cancer, ...The human glycosylase OGG1 extrudes and excises the oxidized DNA base 8-oxoguanine (8-oxoG) to initiate base excision repair and plays important roles in many pathological conditions such as cancer, inflammation, and neurodegenerative diseases. Previous structural studies have used a truncated protein and short linear DNA, so it has been unclear how full-length OGG1 operates on longer DNA or on nucleosomes. Here we report cryo-EM structures of human OGG1 bound to a 35-bp long DNA containing an 8-oxoG within an unmethylated Cp-8-oxoG dinucleotide as well as to a nucleosome with an 8-oxoG at super-helical location (SHL)-5. The 8-oxoG in the linear DNA is flipped out by OGG1, consistent with previous crystallographic findings with a 15-bp DNA. OGG1 preferentially binds near dsDNA ends at the nucleosomal entry/exit sites. Such preference may underlie the enzyme's function in DNA double-strand break repair. Unexpectedly, we find that OGG1 bends the nucleosomal entry DNA, flips an undamaged guanine, and binds to internal nucleosomal DNA sites such as SHL-5 and SHL+6. We suggest that the DNA base search mechanism by OGG1 may be chromatin context-dependent and that OGG1 may partner with chromatin remodelers to excise 8-oxoG at the nucleosomal internal sites. | |||||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8vx4.cif.gz | 100.4 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8vx4.ent.gz | 68.7 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8vx4.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8vx4_validation.pdf.gz | 866.9 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8vx4_full_validation.pdf.gz | 872.5 KB | 表示 | |
XML形式データ | 8vx4_validation.xml.gz | 22.4 KB | 表示 | |
CIF形式データ | 8vx4_validation.cif.gz | 30.6 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/vx/8vx4 ftp://data.pdbj.org/pub/pdb/validation_reports/vx/8vx4 | HTTPS FTP |
-関連構造データ
関連構造データ | 43607MC 8vx5C 8vx6C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: DNA鎖 | 分子量: 10695.851 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
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#2: DNA鎖 | 分子量: 10861.943 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
#3: タンパク質 | 分子量: 43720.020 Da / 分子数: 1 / Mutation: K249Q / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: OGG1, MMH, MUTM, OGH1 / プラスミド: pET28b / 発現宿主: Escherichia coli BL21 (大腸菌) 参照: UniProt: O15527, 加水分解酵素; 糖加水分解酵素; N-グリコシル化合物加水分解酵素, DNA-(apurinic or apyrimidinic site) lyase |
研究の焦点であるリガンドがあるか | Y |
Has protein modification | N |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: Complex of Human OGG1 with a 35 bp DNA duplex containing 8-oxoG タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Escherichia coli (大腸菌) |
緩衝液 | pH: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm / C2レンズ絞り径: 100 µm |
撮影 | 電子線照射量: 64 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3次元再構成 | 解像度: 3.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 2144984 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: REAL | ||||||||||||||||||||||||
拘束条件 |
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