title: The 2.8 Å crystal structure of the dynein motor domain.
abstract: Dyneins are microtubule-based AAA(+) motor complexes that power ciliary beating, cell division, cell migration and intracellular transport. Here we report the most complete structure obtained so far, to our knowledge, of the 380-kDa motor domain of Dictyostelium discoideum cytoplasmic dynein at 2.8 Å resolution; the data are reliable enough to discuss the structure and mechanism at the level of individual amino acid residues. Features that can be clearly visualized at this resolution include the coordination of ADP in each of four distinct nucleotide-binding sites in the ring-shaped AAA(+) ATPase unit, a newly identified interaction interface between the ring and mechanical linker, and junctional structures between the ring and microtubule-binding stalk, all of which should be critical for the mechanism of dynein motility. We also identify a long-range allosteric communication pathway between the primary ATPase and the microtubule-binding sites. Our work provides a framework for understanding the mechanism of dynein-based motility.
authors.affiliation: Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan. takahide.kon@protein.osaka-u.ac.jp
authors.forename: Takahide
authors.initials: T
authors.lastname: Kon
authors.forename: Takuji
authors.initials: T
authors.lastname: Oyama
authors.forename: Rieko
authors.initials: R
authors.lastname: Shimo-Kon
authors.forename: Kenji
authors.initials: K
authors.lastname: Imamula
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Shima
authors.forename: Kazuo
authors.initials: K
authors.lastname: Sutoh
authors.forename: Genji
authors.initials: G
authors.lastname: Kurisu
mesh_terms: D000244:Adenosine Diphosphate / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D000494:Allosteric Regulation; D001665:Binding Sites; D018360:Crystallography, X-Ray; D056445:Cytoplasmic Dyneins / Q000737:chemistry* / Q000378:metabolism; D004023:Dictyostelium / Q000737:chemistry*; D006868:Hydrolysis; D008870:Microtubules / Q000378:metabolism; D008954:Models, Biological; D008958:Models, Molecular; D009068:Movement; D017434:Protein Structure, Tertiary; D013329:Structure-Activity Relationship
chemical_list: D000244:Adenosine Diphosphate; D000255:Adenosine Triphosphate; D056445:Cytoplasmic Dyneins