ジャーナル: Biomacromolecules / 年: 2021 タイトル: Structure of a Minimal α-Carboxysome-Derived Shell and Its Utility in Enzyme Stabilization. 著者: Yong Quan Tan / Samson Ali / Bo Xue / Wei Zhe Teo / Lay Hiang Ling / Maybelle Kho Go / Hong Lv / Robert C Robinson / Akihiro Narita / Wen Shan Yew / 要旨: Bacterial microcompartments are proteinaceous shells that encase specialized metabolic processes in bacteria. Recent advances in simplification of these intricate shells have encouraged ...Bacterial microcompartments are proteinaceous shells that encase specialized metabolic processes in bacteria. Recent advances in simplification of these intricate shells have encouraged bioengineering efforts. Here, we construct minimal shells derived from the α-carboxysome, which we term Cso-shell. Using cryogenic electron microscopy, the atomic-level structures of two shell forms were obtained, reinforcing notions of evolutionarily conserved features in bacterial microcompartment shell architecture. Encapsulation peptide sequences that facilitate loading of heterologous protein cargo within the shells were identified. We further provide a first demonstration in utilizing minimal bacterial microcompartment-derived shells for hosting heterologous enzymes. Cso-shells were found to stabilize enzymatic activities against heat shock, presence of methanol co-solvent, consecutive freeze-thawing, and alkaline environments. This study yields insights into α-carboxysome assembly and advances the utility of synthetic bacterial microcompartments as nanoreactors capable of stabilizing enzymes with varied properties and reaction chemistries.
#165 - 2013年9月 人工設計されたタンパク質製の籠 (Designed Protein Cages) 類似性 (3)
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集合体
登録構造単位
A: Microcompartments protein B: Microcompartments protein C: Microcompartments protein D: Microcompartments protein E: Microcompartments protein F: Microcompartments protein