National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R00 GM141261
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
U24 GM129547
米国
引用
ジャーナル: Nat Commun / 年: 2024 タイトル: Structures of the multi-domain oxygen sensor DosP: remote control of a c-di-GMP phosphodiesterase by a regulatory PAS domain. 著者: Wenbi Wu / Pankaj Kumar / Chad A Brautigam / Shih-Chia Tso / Hamid R Baniasadi / Daniel L Kober / Marie-Alda Gilles-Gonzalez / 要旨: The heme-based direct oxygen sensor DosP degrades c-di-GMP, a second messenger nearly unique to bacteria. In stationary phase Escherichia coli, DosP is the most abundant c-di-GMP phosphodiesterase. ...The heme-based direct oxygen sensor DosP degrades c-di-GMP, a second messenger nearly unique to bacteria. In stationary phase Escherichia coli, DosP is the most abundant c-di-GMP phosphodiesterase. Ligation of O to a heme-binding PAS domain (hPAS) of the protein enhances the phosphodiesterase through an allosteric mechanism that has remained elusive. We determine six structures of full-length DosP in its aerobic or anaerobic conformations, with or without c-di-GMP. DosP is an elongated dimer with the regulatory heme containing domain and phosphodiesterase separated by nearly 180 Å. In the absence of substrate, regardless of the heme status, DosP presents an equilibrium of two distinct conformations. Binding of substrate induces DosP to adopt a single, ON-state or OFF-state conformation depending on its heme status. Structural and biochemical studies of this multi-domain sensor and its mutants provide insights into signal regulation of second-messenger levels.
解像度のタイプ: BY AUTHOR / 解像度: 3.11 Å / 解像度の算出法: FSC 0.143 CUT-OFF 詳細: This is a composite map created by combining maps generated separately for each half of the protein. The particle count and resolution provided refer to the best map obtained. 使用した粒子像数: 307809
初期 角度割当
タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: cryoSPARC (ver. 4.2)
最終 角度割当
タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: cryoSPARC (ver. 4.2)