MEMBRANE PROTEIN / chimera / mechanosensitive ion channel / MscS-like
機能・相同性
機能・相同性情報
intracellular water homeostasis / mechanosensitive monoatomic ion channel activity / cellular response to osmotic stress / protein homooligomerization / monoatomic ion transmembrane transport / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能
Mechanosensitive ion channel protein YnaI-like / Conserved TM helix / Mechanosensitive ion channel, conserved TM helix / Mechanosensitive ion channel MscS, archaea/bacteria type / : / : / Mechanosensitive ion channel MscS, C-terminal / Mechanosensitive ion channel, transmembrane helices 2/3 / Mechanosensitive ion channel MscS, conserved site / Uncharacterized protein family UPF0003 signature. ...Mechanosensitive ion channel protein YnaI-like / Conserved TM helix / Mechanosensitive ion channel, conserved TM helix / Mechanosensitive ion channel MscS, archaea/bacteria type / : / : / Mechanosensitive ion channel MscS, C-terminal / Mechanosensitive ion channel, transmembrane helices 2/3 / Mechanosensitive ion channel MscS, conserved site / Uncharacterized protein family UPF0003 signature. / Mechanosensitive ion channel MscS, C-terminal / Mechanosensitive ion channel MscS, transmembrane-2 / Mechanosensitive ion channel MscS / Mechanosensitive ion channel, beta-domain / Mechanosensitive ion channel MscS, beta-domain superfamily / LSM domain superfamily 類似検索 - ドメイン・相同性
ジャーナル: Nat Commun / 年: 2025 タイトル: Mechanosensitive channel engineering: A study on the mixing and matching of YnaI and MscS sensor paddles and pores. 著者: Vanessa J Flegler / Akiko Rasmussen / Rainer Hedrich / Tim Rasmussen / Bettina Böttcher / 要旨: Osmotically varying environments are challenging for bacterial cells. Sudden drops in osmolytes cause an increased membrane tension and rupture the cells in the absence of protective mechanisms. One ...Osmotically varying environments are challenging for bacterial cells. Sudden drops in osmolytes cause an increased membrane tension and rupture the cells in the absence of protective mechanisms. One family of protective proteins are mechanosensitive channels of small conductance that open in response to membrane tension. Although these channels have a common architecture, they vary widely in the number of transmembrane helices, conductivity, and gating characteristics. Although there are various structures of channels in the open and closed state, the underlying common principles of the gating mechanism remain poorly understood. Here we show that YnaI opens by radial relocation of the transmembrane sensor paddles together with a shortening of the pore, which contrasts the prototypic smaller MscS. A chimera of both channels with the YnaI sensor paddles and the pore containing C-terminal part of MscS is functional and has the tension response of the paddle donor. Our research shows that elements with different structural opening mechanisms can be mixed and matched within one channel as long as they support the common area expansion on the periplasmic side.