National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)
DK54388
米国
引用
ジャーナル: Commun Biol / 年: 2022 タイトル: Structure of putative tumor suppressor ALDH1L1. 著者: Yaroslav Tsybovsky / Valentin Sereda / Marcin Golczak / Natalia I Krupenko / Sergey A Krupenko / 要旨: Putative tumor suppressor ALDH1L1, the product of natural fusion of three unrelated genes, regulates folate metabolism by catalyzing NADP-dependent conversion of 10-formyltetrahydrofolate to ...Putative tumor suppressor ALDH1L1, the product of natural fusion of three unrelated genes, regulates folate metabolism by catalyzing NADP-dependent conversion of 10-formyltetrahydrofolate to tetrahydrofolate and CO. Cryo-EM structures of tetrameric rat ALDH1L1 revealed the architecture and functional domain interactions of this complex enzyme. Highly mobile N-terminal domains, which remove formyl from 10-formyltetrahydrofolate, undergo multiple transient inter-domain interactions. The C-terminal aldehyde dehydrogenase domains, which convert formyl to CO, form unusually large interfaces with the intermediate domains, homologs of acyl/peptidyl carrier proteins (A/PCPs), which transfer the formyl group between the catalytic domains. The 4'-phosphopantetheine arm of the intermediate domain is fully extended and reaches deep into the catalytic pocket of the C-terminal domain. Remarkably, the tetrameric state of ALDH1L1 is indispensable for catalysis because the intermediate domain transfers formyl between the catalytic domains of different protomers. These findings emphasize the versatility of A/PCPs in complex, highly dynamic enzymatic systems.
電子線照射量: 40 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k)
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解析
ソフトウェア
名称: REFMAC / バージョン: 5.8.0222 / 分類: 精密化
EMソフトウェア
ID
名称
バージョン
カテゴリ
7
Coot
モデルフィッティング
10
RELION
3
最終オイラー角割当
12
RELION
3
3次元再構成
13
REFMAC
モデル精密化
CTF補正
タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION
対称性
点対称性: D2 (2回x2回 2面回転対称)
3次元再構成
解像度: 2.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 202398 / 対称性のタイプ: POINT
原子モデル構築
プロトコル: BACKBONE TRACE
精密化
Cor.coef. Fo:Fc: 0.738 / 最高解像度: 2.9 Å / SU B: 21.467 / SU ML: 0.379 / ESU R: 0.814 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
反射数
%反射
Rwork
0.37344
-
-
obs
0.37344
104509
100 %
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK