- EMDB-60594: Cryo-EM structure of hetero-bacterioferritin SoBfr12 from Shewane... -
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データベース: EMDB / ID: EMD-60594
タイトル
Cryo-EM structure of hetero-bacterioferritin SoBfr12 from Shewanella oneidensis
マップデータ
試料
複合体: Cryo-EM structure of Shewanelle oneidensis bacterioferritin SoBfr12 in C1 symmetry
タンパク質・ペプチド: Bacterioferritin
タンパク質・ペプチド: Bacterioferritin
リガンド: SODIUM ION
リガンド: PROTOPORPHYRIN IX CONTAINING FE
キーワード
24-mer bacterioferritin / metal transport / oxidoreductase / heme-binding protein
機能・相同性
機能・相同性情報
ferroxidase / ferroxidase activity / ferric iron binding / iron ion transport / intracellular iron ion homeostasis / iron ion binding / heme binding / cytosol 類似検索 - 分子機能
National Natural Science Foundation of China (NSFC)
31930003
中国
引用
ジャーナル: Adv Sci (Weinh) / 年: 2025 タイトル: Unveiling Structural Heterogeneity and Evolutionary Adaptations of Heteromultimeric Bacterioferritin Nanocages. 著者: Yingxi Li / Weiwei Wang / Wei Wang / Xing Zhang / Jinghua Chen / Haichun Gao / 要旨: Iron-storage bacterioferritins (Bfrs), existing in either homo- or hetero-multimeric form, play a crucial role in iron homeostasis. While the structure and function of homo-multimeric ...Iron-storage bacterioferritins (Bfrs), existing in either homo- or hetero-multimeric form, play a crucial role in iron homeostasis. While the structure and function of homo-multimeric bacterioferritins (homo-Bfrs) have been extensively studied, little is known about the assembly, distinctive characteristics, or evolutionary adaptations of hetero-multimeric bacterioferritins (hetero-Bfrs). Here, the cryo-EM structure and functional characterization of a bacterial hetero-Bfr (SoBfr12) are reported. Compared to homo-Bfrs, although SoBfr12 exhibits a conserved spherical cage-like dodecahedron, its pores through which ions traverse exhibit substantially increased diversity. Importantly, the heterogeneity has significant impacts on sites for ion entry, iron oxidation, and reduction. Moreover, evolutionary analyses reveal that hetero-Bfrs may represent a new class within the Bfr subfamily, consisting of two different types that may have evolved from homo-Bfr through tandem duplication and directly from ferritin (Ftn) via dispersed duplication, respectively. These results reveal remarkable structural and functional features of a hetero-Bfr, enabling the rational design of nanocages for enhanced iron-storing efficiency and for other specific purposes, such as drug delivery vehicles and nanozymes.