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Chemistry at the protein–mineral interface in L-ferritin assists the assembly of a functional (μ3-oxo)Tris[(μ2-peroxo)] triiron(III) cluster


Cecilia Pozzia, Silvia Ciambellottib,c, Caterina Bernacchionib,c, Flavio Di Pisaa, Stefano Mangania,b,1, and Paola Turanob,c,1

aDepartment of Biotechnology, Chemistry, and Pharmacy, University of Siena, Siena 53100, Italy; bCentro di Risonanze Magnetiche, University of Florence, Sesto Fiorentino, Florence 50019, Italy; and cDepartment of Chemistry, University of Florence, Sesto Fiorentino, Florence 50019, Italy

Edited by Harry B. Gray, California Institute of Technology, Pasadena, CA, and approved January 20, 2017 (received for review August 26, 2016)




ferritinは生体内の鉄の貯蔵、供給を担うタンパク質であり、それらは主に183、あるいは175残基のアミノ酸からなるH-サブユニット、L-サブユニットによって構成されています。それらのサブユニットのうち、L-サブユニットに豊富に存在するL-ferritinは肝臓や脾臓などの鉄貯蔵を担っています。このL-ferritinがどのように貯蔵しているかというのは判っていませんでした。この論文では鉄溶液にさらしたタンパク質の結晶構造の解析に成功したことが重要な点です。




上の図のように鉄三核錯体を形成しており、今後モデル錯体を合成することによる反応性、安定性の研究がなされ、様々な反応への三核鉄錯体の応用が期待されます。

コメント

Yuma Morimoto さんの投稿…
三核の鉄に、三つ酸素(パーオキソ)がついた構造なんて、できるんですね。データの精度はわかりませんが。
びっくりしました。

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