Dimeric heat shock protein 40 binds radial spokes for generating coupled power strokes and recovery strokes of 9 + 2 flagella.
Dimeric heat shock protein 40 binds radial spokes for generating coupled power strokes and recovery strokes of 9 + 2 flagella.
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DOI:
10.1083/jcb.200705069
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发表时间:
2008-01-28
期刊:
影响因子:
--
通讯作者:
Yang P
中科院分区:
文献类型:
--
作者:
Yang C;Owen HA;Yang P
T-shape radial spokes regulate flagellar beating. However, the precise function and molecular mechanism of these spokes remain unclear. Interestingly, Chlamydomonas reinhardtii flagella lacking a dimeric heat shock protein (HSP) 40 at the spokehead–spokestalk juncture appear normal in length and composition but twitch actively while cells jiggle without procession, resembling a central pair (CP) mutant. HSP40− cells begin swimming upon electroporation with recombinant HSP40. Surprisingly, the rescue doesn't require the signature DnaJ domain. Furthermore, the His-Pro-Asp tripeptide that is essential for stimulating HSP70 adenosine triphosphatase diverges in candidate orthologues, including human DnaJB13. Video microscopy reveals hesitance in bend initiation and propagation as well as irregular stalling and stroke switching despite fairly normal waveform. The in vivo evidence suggests that the evolutionarily conserved HSP40 specifically transforms multiple spoke proteins into stable conformation capable of mechanically coupling the CP with dynein motors. This enables 9 + 2 cilia and flagella to bend and switch to generate alternate power strokes and recovery strokes.
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DOI:
10.1083/jcb.200406148
发表时间:
2004-08-30
期刊:
The Journal of cell biology
影响因子:
--
作者:
Mitchell DR;Nakatsugawa M
通讯作者:
Nakatsugawa M
影响因子:
--
作者:
BROKAW, CJ;LUCK, DJL
通讯作者:
LUCK, DJL
影响因子:
3.3
作者:
Mitchell, BF;Pedersen, LB;Mitchell, DR
通讯作者:
Mitchell, DR
影响因子:
--
作者:
Hayashi, M;Yanagisawa, H;Kamiya, R
通讯作者:
Kamiya, R
DOI:
10.1083/jcb.98.1.229
发表时间:
1984-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
Dutcher SK;Huang B;Luck DJ
通讯作者:
Luck DJ