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-Structure paper
タイトル | Structure of the dynein-2 complex and its assembly with intraflagellar transport trains. |
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ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 26, Issue 9, Page 823-829, Year 2019 |
掲載日 | 2019年8月26日 |
著者 | Katerina Toropova / Ruta Zalyte / Aakash G Mukhopadhyay / Miroslav Mladenov / Andrew P Carter / Anthony J Roberts / |
PubMed 要旨 | Dynein-2 assembles with polymeric intraflagellar transport (IFT) trains to form a transport machinery that is crucial for cilia biogenesis and signaling. Here we recombinantly expressed the ~1.4-MDa ...Dynein-2 assembles with polymeric intraflagellar transport (IFT) trains to form a transport machinery that is crucial for cilia biogenesis and signaling. Here we recombinantly expressed the ~1.4-MDa human dynein-2 complex and solved its cryo-EM structure to near-atomic resolution. The two identical copies of the dynein-2 heavy chain are contorted into different conformations by a WDR60-WDR34 heterodimer and a block of two RB and six LC8 light chains. One heavy chain is steered into a zig-zag conformation, which matches the periodicity of the anterograde IFT-B train. Contacts between adjacent dyneins along the train indicate a cooperative mode of assembly. Removal of the WDR60-WDR34-light chain subcomplex renders dynein-2 monomeric and relieves autoinhibition of its motility. Our results converge on a model in which an unusual stoichiometry of non-motor subunits controls dynein-2 assembly, asymmetry, and activity, giving mechanistic insight into the interaction of dynein-2 with IFT trains and the origin of diverse functions in the dynein family. |
リンク | Nat Struct Mol Biol / PubMed:31451806 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.9 - 4.5 Å |
構造データ | PDB-6sc2: |
化合物 | ChemComp-ADP: ChemComp-ATP: ChemComp-MG: |
由来 |
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キーワード | MOTOR PROTEIN / dynein / cilia / intraflagellar transport / complex |