Cryoelectron tomography of radial spokes in cilia and flagella.
Cryoelectron tomography of radial spokes in cilia and flagella.
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DOI:
10.1083/jcb.201106125
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发表时间:
2011-11-14
期刊:
影响因子:
--
通讯作者:
Ishikawa T
中科院分区:
文献类型:
--
作者:
Pigino G;Bui KH;Maheshwari A;Lupetti P;Diener D;Ishikawa T
Cryo-EM tomography of wild-type and mutant cilia and flagella from Tetrahymena and Chlamydomonas reveals new information on the substructure of radial spokes. Radial spokes (RSs) are ubiquitous components in the 9 + 2 axoneme thought to be mechanochemical transducers involved in local control of dynein-driven microtubule sliding. They are composed of >23 polypeptides, whose interactions and placement must be deciphered to understand RS function. In this paper, we show the detailed three-dimensional (3D) structure of RS in situ in Chlamydomonas reinhardtii flagella and Tetrahymena thermophila cilia that we obtained using cryoelectron tomography (cryo-ET). We clarify similarities and differences between the three spoke species, RS1, RS2, and RS3, in T. thermophila and in C. reinhardtii and show that part of RS3 is conserved in C. reinhardtii, which only has two species of complete RSs. By analyzing C. reinhardtii mutants, we identified the specific location of subsets of RS proteins (RSPs). Our 3D reconstructions show a twofold symmetry, suggesting that fully assembled RSs are produced by dimerization. Based on our cryo-ET data, we propose models of subdomain organization within the RS as well as interactions between RSPs and with other axonemal components.
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DOI:
10.1083/jcb.92.3.722
发表时间:
1982-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Brokaw CJ;Luck DJ;Huang B
通讯作者:
Huang B
DOI:
10.1083/jcb.136.1.167
发表时间:
1997-01-13
期刊:
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影响因子:
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DOI:
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发表时间:
1985-06
期刊:
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影响因子:
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作者:
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通讯作者:
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影响因子:
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