- EMDB-0208: OBP chaperonin in the ATPgammaS-bound state -
+
データを開く
IDまたはキーワード:
読み込み中...
-
基本情報
登録情報
データベース: EMDB / ID: EMD-0208
タイトル
OBP chaperonin in the ATPgammaS-bound state
マップデータ
A symmetry-free cryo-EM structure of a single-ring chaperonin encoded by gene 246 of bacteriophage OBP Pseudomonas fluorescens in the ATPgammaS-bound state.
ジャーナル: J Struct Biol / 年: 2020 タイトル: Cryo-EM reveals an asymmetry in a novel single-ring viral chaperonin. 著者: Tatiana B Stanishneva-Konovalova / Pavel I Semenyuk / Lidia P Kurochkina / Evgeny B Pichkur / Alexander L Vasilyev / Mikhail V Kovalchuk / Mikhail P Kirpichnikov / Olga S Sokolova / 要旨: Chaperonins are ubiquitously present protein complexes, which assist the proper folding of newly synthesized proteins and prevent aggregation of denatured proteins in an ATP-dependent manner. They ...Chaperonins are ubiquitously present protein complexes, which assist the proper folding of newly synthesized proteins and prevent aggregation of denatured proteins in an ATP-dependent manner. They are classified into group I (bacterial, mitochondrial, chloroplast chaperonins) and group II (archaeal and eukaryotic cytosolic variants). However, both of these groups do not include recently discovered viral chaperonins. Here, we solved the symmetry-free cryo-EM structures of a single-ring chaperonin encoded by the gene 246 of bacteriophage OBP Pseudomonas fluorescens, in the nucleotide-free, ATPγS-, and ADP-bound states, with resolutions of 4.3 Å, 5.0 Å, and 6 Å, respectively. The structure of OBP chaperonin reveals a unique subunit arrangement, with three pairs of subunits and one unpaired subunit. Each pair combines subunits in two possible conformations, differing in nucleotide-binding affinity. The binding of nucleotides results in the increase of subunits' conformational variability. Due to its unique structural and functional features, OBP chaperonin can represent a new group.
ダウンロード / ファイル: emd_0208.map.gz / 形式: CCP4 / 大きさ: 8.8 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
A symmetry-free cryo-EM structure of a single-ring chaperonin encoded by gene 246 of bacteriophage OBP Pseudomonas fluorescens in the ATPgammaS-bound state.