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データを開く
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基本情報
登録情報 | ![]() | |||||||||
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タイトル | MurE subunit of the spinach plastid-encoded RNA polymerase | |||||||||
![]() | Due to the high flexibility in these regions, the locally refined maps show the general outline for these two subunits, with most of the unmasked protein structure occupied by noise. All calculations were performed using CryoSPARC, which may have led to an overestimation of the resolution. Authors said they can either adopt the resolution calculated by the EMDB and make corresponding revisions to the article, or they can provide the Auto-tightening mask used during the CryoSPARC refinement. | |||||||||
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![]() | plastid-encoded RNA polymerase / chloroplast / spinach / TRANSCRIPTION | |||||||||
生物種 | ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.87 Å | |||||||||
![]() | Wang G-L / Yu L-J / Lu C | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Architecture of the spinach plastid-encoded RNA polymerase. 著者: Tongtong Wang / Guang-Lei Wang / Ying Fang / Yi Zhang / Wenxin Peng / Yue Zhou / Aihong Zhang / Long-Jiang Yu / Congming Lu / ![]() 要旨: The plastid-encoded RNA polymerase serves as the principal transcription machinery within chloroplasts, transcribing over 80% of all primary plastid transcripts. This polymerase consists of a ...The plastid-encoded RNA polymerase serves as the principal transcription machinery within chloroplasts, transcribing over 80% of all primary plastid transcripts. This polymerase consists of a prokaryotic-like core enzyme known as the plastid-encoded RNA polymerase core, and is supplemented by newly evolved associated proteins known as PAPs. However, the architecture of the plastid-encoded RNA polymerase and the possible functions of PAPs remain unknown. Here, we present the cryo-electron microscopy structure of a 19-subunit plastid-encoded RNA polymerase complex derived from spinach (Spinacia oleracea). The structure shows that the plastid-encoded RNA polymerase core resembles bacterial RNA polymerase. Twelve PAPs and two additional proteins (FLN2 and pTAC18) bind at the periphery of the plastid-encoded RNA polymerase core, forming extensive interactions that may facilitate complex assembly and stability. PAPs may also protect the complex against oxidative damage and has potential functions in transcriptional regulation. This research offers a structural basis for future investigations into the functions and regulatory mechanisms governing the transcription of plastid genes. | |||||||||
履歴 |
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構造の表示
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 483.5 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 14.3 KB 14.3 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 17 KB | 表示 | ![]() |
画像 | ![]() | 55.6 KB | ||
マスクデータ | ![]() | 512 MB | ![]() | |
Filedesc metadata | ![]() | 5.1 KB | ||
その他 | ![]() ![]() | 475.6 MB 475.6 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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マップ
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注釈 | Due to the high flexibility in these regions, the locally refined maps show the general outline for these two subunits, with most of the unmasked protein structure occupied by noise. All calculations were performed using CryoSPARC, which may have led to an overestimation of the resolution. Authors said they can either adopt the resolution calculated by the EMDB and make corresponding revisions to the article, or they can provide the Auto-tightening mask used during the CryoSPARC refinement. | ||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.1 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-マスク #1
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_61151_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #2
ファイル | emd_61151_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : DNA-directed RNA polymerase subunit beta''
全体 | 名称: DNA-directed RNA polymerase subunit beta'' |
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要素 |
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-超分子 #1: DNA-directed RNA polymerase subunit beta''
超分子 | 名称: DNA-directed RNA polymerase subunit beta'' / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() |
-分子 #1: MurE
分子 | 名称: MurE / タイプ: protein_or_peptide / ID: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
配列 | 文字列: MFLQPFLTLP STISSPTNSS SSSSSLHFTK PLFLRPSISL LRRKTPSAAG NYYPNPSDDD PPEAPEDSSH GVSKFGQIQR QAARARKLE EEDFEKNRSV FLDAIKDVED APENEDYSTG VSGSGDDLFG DIDKAIAQKR KEFVKKGLLK PNPPKSERVV E VADDELGQ ...文字列: MFLQPFLTLP STISSPTNSS SSSSSLHFTK PLFLRPSISL LRRKTPSAAG NYYPNPSDDD PPEAPEDSSH GVSKFGQIQR QAARARKLE EEDFEKNRSV FLDAIKDVED APENEDYSTG VSGSGDDLFG DIDKAIAQKR KEFVKKGLLK PNPPKSERVV E VADDELGQ EEVVDLEEID ELQGLRVVDV SEKEEEFDDD DIDVEVSELG KNGSSSSLFD ASFDIDFDSL GNNSSNKVRI VE PSFKMTL AELLDECKVV PISVYGDLEV EITGIEHDSR LVNSGDLFVC CVDGNLCLIE ADKRGAVAVV ASKEIDIEET LGC KALVIV EDTNAALPAL AAAFFRYPTK SMSVIGITGT HGKTTAAHLI KTMYEAMGLR TGMMSSVAYY VHGDNKLDFP EANP DAVLV QKLMAKMLHN GTEAVVMEAS SNELTHTRCE EIDFDIAVFT NLSRDNSHFQ GNEEEFRVAQ AKLFSRMVDP DRHRK IVNV DDPNAPFFIA QGNPNVPVLT FALENKDADV HPLKFELSLF ETTVLVNTPQ GILEISSGLL GRHNIYNILA AVTVGI AVG APLEDIVRGI EEVDAVPGRC EVIDEEQAFG VIVDHARTPD ALSRLLDSVR ELQPRRIITV IGSCGEKERG KRPMLAK VA TDKSDVTMLT SDNQGSEDPL DILDDMLAGI GWTMQDYLKH GENDYYPPLP NGHRLFLHDI RRVAVRCAVA MGEEGDMV V VAGKGHEAYQ VDGDKKEFFD DREECREALQ YVDELHQAGI DTSEFPWRLP ESH |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
濃度 | 2 mg/mL |
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緩衝液 | pH: 7.6 |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 298 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 50.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2.0 µm / 最小 デフォーカス(公称値): 0.8 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |