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-Structure paper
タイトル | Structural basis of the filamin A actin-binding domain interaction with F-actin. |
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ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 25, Issue 10, Page 918-927, Year 2018 |
掲載日 | 2018年9月17日 |
![]() | Daniel V Iwamoto / Andrew Huehn / Bertrand Simon / Clotilde Huet-Calderwood / Massimiliano Baldassarre / Charles V Sindelar / David A Calderwood / ![]() ![]() |
PubMed 要旨 | Actin-cross-linking proteins assemble actin filaments into higher-order structures essential for orchestrating cell shape, adhesion, and motility. Missense mutations in the tandem calponin homology ...Actin-cross-linking proteins assemble actin filaments into higher-order structures essential for orchestrating cell shape, adhesion, and motility. Missense mutations in the tandem calponin homology domains of their actin-binding domains (ABDs) underlie numerous genetic diseases, but a molecular understanding of these pathologies is hampered by the lack of high-resolution structures of any actin-cross-linking protein bound to F-actin. Here, taking advantage of a high-affinity, disease-associated mutant of the human filamin A (FLNa) ABD, we combine cryo-electron microscopy and functional studies to reveal at near-atomic resolution how the first calponin homology domain (CH1) and residues immediately N-terminal to it engage actin. We further show that reorientation of CH2 relative to CH1 is required to avoid clashes with actin and to expose F-actin-binding residues on CH1. Our data explain localization of disease-associated loss-of-function mutations to FLNaCH1 and gain-of-function mutations to the regulatory FLNaCH2. Sequence conservation argues that this provides a general model for ABD-F-actin binding. |
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手法 | EM (らせん対称) |
解像度 | 3.54 - 9.8 Å |
構造データ | EMDB-7831, PDB-6d8c: ![]() EMDB-7832: ![]() EMDB-7833: ![]() EMDB-8918: |
化合物 | ![]() ChemComp-ADP: ![]() ChemComp-MG: |
由来 |
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![]() | STRUCTURAL PROTEIN / Actin-binding domain / Actin crosslinker |