- EMDB-12738: 2.12 A cryo-EM structure of Mycobacterium tuberculosis Ferritin -
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基本情報
登録情報
データベース: EMDB / ID: EMD-12738
タイトル
2.12 A cryo-EM structure of Mycobacterium tuberculosis Ferritin
マップデータ
Sharpened map with Locspiral.
試料
細胞器官・細胞要素: Mycobacterium tuberculosis ferritin
タンパク質・ペプチド: Ferritin BfrB
リガンド: water
キーワード
Iron storage / Ferroxidase / Bacterial Ferritin / Octahedral symmetry. / METAL TRANSPORT
機能・相同性
機能・相同性情報
Mtb iron assimilation by chelation / response to nitrosative stress / encapsulin nanocompartment / iron ion sequestering activity / ferroxidase / intracellular sequestering of iron ion / ferroxidase activity / peptidoglycan-based cell wall / ferric iron binding / ferrous iron binding ...Mtb iron assimilation by chelation / response to nitrosative stress / encapsulin nanocompartment / iron ion sequestering activity / ferroxidase / intracellular sequestering of iron ion / ferroxidase activity / peptidoglycan-based cell wall / ferric iron binding / ferrous iron binding / iron ion transport / response to hypoxia / extracellular region / plasma membrane / cytoplasm / cytosol 類似検索 - 分子機能
Netherlands Organisation for Scientific Research (NWO)
184.034.014
オランダ
引用
ジャーナル: Acta Crystallogr D Struct Biol / 年: 2021 タイトル: Mycobacterium tuberculosis ferritin: a suitable workhorse protein for cryo-EM development. 著者: Abril Gijsbers / Yue Zhang / Ye Gao / Peter J Peters / Raimond B G Ravelli / 要旨: The use of cryo-EM continues to expand worldwide and calls for good-quality standard proteins with simple protocols for their production. Here, a straightforward expression and purification protocol ...The use of cryo-EM continues to expand worldwide and calls for good-quality standard proteins with simple protocols for their production. Here, a straightforward expression and purification protocol is presented that provides an apoferritin, bacterioferritin B (BfrB), from Mycobacterium tuberculosis with high yield and purity. A 2.12 Å resolution cryo-EM structure of BfrB is reported, showing the typical cage-like oligomer constituting of 24 monomers related by 432 symmetry. However, it also contains a unique C-terminal extension (164-181), which loops into the cage region of the shell and provides extra stability to the protein. Part of this region was ambiguous in previous crystal structures but could be built within the cryo-EM map. These findings and this protocol could serve the growing cryo-EM community in characterizing and pushing the limits of their electron microscopes and workflows.