- EMDB-34200: Complex Structure of Arginine Kinase McsB and McsA from Staphyloc... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-34200
タイトル
Complex Structure of Arginine Kinase McsB and McsA from Staphylococcus aureus
マップデータ
Complex Structure of Arginine Kinase McsB and McsA from Staphylococcus aureus
試料
複合体: McsA-McsB complex
タンパク質・ペプチド: Protein-arginine kinase
タンパク質・ペプチド: Protein-arginine kinase activator protein
リガンド: ZINC ION
キーワード
Arginine kinase / Protein quality control / Zinc finger / Enzyme activation / TRANSFERASE
機能・相同性
機能・相同性情報
protein arginine kinase / stress response to cadmium ion / stress response to copper ion / phosphocreatine biosynthetic process / creatine kinase activity / cobalt ion binding / cadmium ion binding / kinase activity / protein kinase activity / copper ion binding ...protein arginine kinase / stress response to cadmium ion / stress response to copper ion / phosphocreatine biosynthetic process / creatine kinase activity / cobalt ion binding / cadmium ion binding / kinase activity / protein kinase activity / copper ion binding / DNA binding / extracellular space / zinc ion binding / ATP binding 類似検索 - 分子機能
YacH protein / Protein arginine kinase / UvrB/uvrC motif / ATP:guanido phosphotransferase active site / Phosphagen kinase active site signature. / ATP:guanido phosphotransferase / ATP:guanido phosphotransferase, catalytic domain / ATP:guanido phosphotransferase, C-terminal catalytic domain / Phosphagen kinase C-terminal domain profile. / UVR domain ...YacH protein / Protein arginine kinase / UvrB/uvrC motif / ATP:guanido phosphotransferase active site / Phosphagen kinase active site signature. / ATP:guanido phosphotransferase / ATP:guanido phosphotransferase, catalytic domain / ATP:guanido phosphotransferase, C-terminal catalytic domain / Phosphagen kinase C-terminal domain profile. / UVR domain / UVR domain profile. / Zinc finger, PARP-type / Glutamine synthetase/guanido kinase, catalytic domain 類似検索 - ドメイン・相同性
Protein-arginine kinase / Protein-arginine kinase activator protein 類似検索 - 構成要素
National Natural Science Foundation of China (NSFC)
22077142
中国
National Natural Science Foundation of China (NSFC)
22022706
中国
National Natural Science Foundation of China (NSFC)
21837006
中国
National Natural Science Foundation of China (NSFC)
91953117
中国
National Natural Science Foundation of China (NSFC)
21877131
中国
National Natural Science Foundation of China (NSFC)
32070049
中国
National Natural Science Foundation of China (NSFC)
32222040
中国
Ministry of Science and Technology (MoST, China)
2021YFA1301900
中国
引用
ジャーナル: Nat Chem Biol / 年: 2025 タイトル: Complex structure and activation mechanism of arginine kinase McsB by McsA. 著者: Kai Lu / Bingnan Luo / Xuan Tao / Yongbo Luo / Mingjun Ao / Bin Zheng / Xiang Xu / Xiaoyan Ma / Jingling Niu / Huinan Li / Yanxuan Xie / Zhennan Zhao / Peng Zheng / Guanbo Wang / Song Gao / ...著者: Kai Lu / Bingnan Luo / Xuan Tao / Yongbo Luo / Mingjun Ao / Bin Zheng / Xiang Xu / Xiaoyan Ma / Jingling Niu / Huinan Li / Yanxuan Xie / Zhennan Zhao / Peng Zheng / Guanbo Wang / Song Gao / Chao Wang / Wei Xia / Zhaoming Su / Zong-Wan Mao / 要旨: Protein phosphorylation is a pivotal post-translational modification modulating various cellular processes. In Gram-positive bacteria, the protein arginine kinase McsB, along with its activator McsA, ...Protein phosphorylation is a pivotal post-translational modification modulating various cellular processes. In Gram-positive bacteria, the protein arginine kinase McsB, along with its activator McsA, has a key role in labeling misfolded and damaged proteins during stress. However, the activation mechanism of McsB by McsA remains elusive. Here we report the cryo-electron microscopy structure of a tetrameric McsA-McsB complex at 3.41 Å resolution. Biochemical analysis indicates that the homotetrameric assembly is essential for McsB's kinase activity. The conserved C-terminal zinc finger of McsA interacts with an extended loop in McsB, optimally orienting a critical catalytic cysteine residue. In addition, McsA binding decreases the CtsR's affinity for McsB, enhancing McsB's kinase activity and accelerating the turnover rate of CtsR phosphorylation. Furthermore, McsA binding also increases McsB's thermostability, ensuring its activity under heat stress. These findings elucidate the structural basis and activation mechanism of McsB in stress response.