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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 7lb6 | |||||||||
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タイトル | PDX1.2/PDX1.3 co-expression complex | |||||||||
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![]() | PLANT PROTEIN / pseudoenzyme / dodecamer / vitamin B6 | |||||||||
機能・相同性 | ![]() response to non-ionic osmotic stress / amine-lyase activity / response to lipid hydroperoxide / chlorophyll metabolic process / pyridoxal 5'-phosphate synthase (glutamine hydrolysing) / pyridoxal 5'-phosphate synthase (glutamine hydrolysing) activity / pyridoxal phosphate biosynthetic process / hyperosmotic salinity response / pyridoxine biosynthetic process / amino acid metabolic process ...response to non-ionic osmotic stress / amine-lyase activity / response to lipid hydroperoxide / chlorophyll metabolic process / pyridoxal 5'-phosphate synthase (glutamine hydrolysing) / pyridoxal 5'-phosphate synthase (glutamine hydrolysing) activity / pyridoxal phosphate biosynthetic process / hyperosmotic salinity response / pyridoxine biosynthetic process / amino acid metabolic process / response to UV-B / endomembrane system / response to salt stress / response to oxidative stress / protein heterodimerization activity / protein homodimerization activity / plasma membrane / cytosol 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() | |||||||||
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: 3.16 Å | |||||||||
![]() | Novikova, I.V. / Evans, J.E. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Tunable Heteroassembly of a Plant Pseudoenzyme-Enzyme Complex. 著者: Irina V Novikova / Mowei Zhou / Chen Du / Marcelina Parra / Doo Nam Kim / Zachary L VanAernum / Jared B Shaw / Hanjo Hellmann / Vicki H Wysocki / James E Evans / ![]() 要旨: Pseudoenzymes have emerged as key regulatory elements in all kingdoms of life despite being catalytically nonactive. Yet many factors defining why one protein is active while its homologue is ...Pseudoenzymes have emerged as key regulatory elements in all kingdoms of life despite being catalytically nonactive. Yet many factors defining why one protein is active while its homologue is inactive remain uncertain. For pseudoenzyme-enzyme pairs, the similarity of both subunits can often hinder conventional characterization approaches. In plants, a pseudoenzyme, PDX1.2, positively regulates vitamin B production by association with its active catalytic homologues such as PDX1.3 through an unknown assembly mechanism. Here we used an integrative experimental approach to learn that such pseudoenzyme-enzyme pair associations result in heterocomplexes of variable stoichiometry, which are unexpectedly tunable. We also present the atomic structure of the PDX1.2 pseudoenzyme as well as the population averaged PDX1.2-PDX1.3 pseudoenzyme-enzyme pair. Finally, we dissected hetero-dodecamers of each stoichiometry to understand the arrangement of monomers in the heterocomplexes and identified symmetry-imposed preferences in PDX1.2-PDX1.3 interactions. Our results provide a new model of pseudoenzyme-enzyme interactions and their native heterogeneity. | |||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 1 MB | 表示 | ![]() |
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PDB形式 | ![]() | 857.9 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
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-検証レポート
文書・要旨 | ![]() | 1 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.1 MB | 表示 | |
XML形式データ | ![]() | 152.9 KB | 表示 | |
CIF形式データ | ![]() | 191.5 KB | 表示 | |
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
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 37408.004 Da / 分子数: 12 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: PDX12, A37, PDX1L2, At3g16050, MSL1.3 / 発現宿主: ![]() ![]() #2: タンパク質 | 分子量: 36475.531 Da / 分子数: 12 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: PDX13, GIP2, PDX1L3, RSR4, At5g01410, T10O8.120 / 発現宿主: ![]() ![]() 参照: UniProt: Q8L940, pyridoxal 5'-phosphate synthase (glutamine hydrolysing) |
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-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 |
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試料調製
構成要素 | 名称: PDX1.2/PDX1.3 heterododecamer / タイプ: COMPLEX 詳細: Represents an average 3D class for all PDX1.2/PDX1.3 heterododecamers Entity ID: all / 由来: RECOMBINANT |
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分子量 | 値: 0.445 MDa / 実験値: YES |
由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.5 / 詳細: 50 mM Tris, 150 mM NaCl, 4 mM DTT |
試料 | 濃度: 0.2 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: at 15 mA / グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: LEICA EM GP / 凍結剤: ETHANE / 湿度: 85 % / 凍結前の試料温度: 298 K |
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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: ![]() |
電子レンズ | モード: BRIGHT FIELD / Cs: 2.7 mm |
撮影 | 電子線照射量: 100 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 510660 | |||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: D6 (2回x6回 2面回転対称) | |||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.16 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 286642 / 対称性のタイプ: POINT |