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Updated: Jun 25, 2025

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
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Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution

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アンモニアを酸化する海洋アーカイアにおける膜のないシートチャネル

Andriko von Kügelgen1,2, C Keith Cassidy3, Sofie van Dorst2

  • 1Structural Studies Division, MRC Laboratory of Molecular Biology, Cambridge, UK.

Nature
|May 29, 2024
PubMed
まとめ

Nitrosopumilus maritimusは表面層 (S層) を使用して海水からアンモニアイオンを吸収します. この構造は,窒素循環のためのアンモニアを集約する分子として機能します.

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Protein Transport into the Inner Mitochondrial Membrane

Nuclear encoded mitochondrial precursors are imported to the inner membrane in a multistep process involving two separate translocons, TIM22 and TIM23. TIM23 is a cation-selective pore that remains closed by the N terminal segment of the protein. Negative charges on the TIM23 act as a receptor for the incoming precursor, pulling the positively charged matrix-targeting sequence for peptide insertion and translocation.
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Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
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