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-Structure paper
| タイトル | The structures of protein kinase A in complex with CFTR: Mechanisms of phosphorylation and noncatalytic activation. |
|---|---|
| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 121, Issue 46, Page e2409049121, Year 2024 |
| 掲載日 | 2024年11月12日 |
著者 | Karol Fiedorczuk / Iordan Iordanov / Csaba Mihályi / Andras Szollosi / László Csanády / Jue Chen / ![]() |
| PubMed 要旨 | Protein kinase A (PKA) is a key regulator of cellular functions by selectively phosphorylating numerous substrates, including ion channels, enzymes, and transcription factors. It has long served as a ...Protein kinase A (PKA) is a key regulator of cellular functions by selectively phosphorylating numerous substrates, including ion channels, enzymes, and transcription factors. It has long served as a model system for understanding the eukaryotic kinases. Using cryoelectron microscopy, we present complex structures of the PKA catalytic subunit (PKA-C) bound to a full-length protein substrate, the cystic fibrosis transmembrane conductance regulator (CFTR)-an ion channel vital to human health. CFTR gating requires phosphorylation of its regulatory (R) domain. Unphosphorylated CFTR engages PKA-C at two locations, establishing two "catalytic stations" near to, but not directly involving, the R domain. This configuration, coupled with the conformational flexibility of the R domain, permits transient interactions of the eleven spatially separated phosphorylation sites. Furthermore, we determined two structures of the open-pore CFTR stabilized by PKA-C, providing a molecular basis to understand how PKA-C stimulates CFTR currents even in the absence of phosphorylation. |
リンク | Proc Natl Acad Sci U S A / PubMed:39495916 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.8 - 9.0 Å |
| 構造データ | EMDB-47235, PDB-9dw4: EMDB-47236, PDB-9dw5: EMDB-47237, PDB-9dw7: EMDB-47238, PDB-9dw8: EMDB-47239, PDB-9dw9: |
| 化合物 | ![]() ChemComp-MG: ![]() ChemComp-ANP: ![]() ChemComp-B44: ![]() ChemComp-CLR: ![]() ChemComp-D10: ![]() ChemComp-ATP: ![]() ChemComp-CL: ![]() ChemComp-UND: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | HYDROLASE / CFTR / PKA / complex |
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