Detailed Analyses of Stall Force Generation in Mycoplasma mobile Gliding.
Detailed Analyses of Stall Force Generation in Mycoplasma mobile Gliding.
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DOI:
10.1016/j.bpj.2018.01.029
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发表时间:
2018-03-27
影响因子:
3.4
通讯作者:
Miyata M
中科院分区:
文献类型:
--
作者:
Mizutani M;Tulum I;Kinosita Y;Nishizaka T;Miyata M
Mycoplasma mobile is a bacterium that uses a unique mechanism to glide on solid surfaces at a velocity of up to 4.5 μm/s. Its gliding machinery comprises hundreds of units that generate the force for gliding based on the energy derived from ATP; the units catch and pull sialylated oligosaccharides fixed to solid surfaces. In this study, we measured the stall force of wild-type and mutant strains of M. mobile carrying a bead manipulated using optical tweezers. The strains that had been enhanced for binding exhibited weaker stall forces than the wild-type strain, indicating that stall force is related to force generation rather than to binding. The stall force of the wild-type strain decreased linearly from 113 to 19 picoNewtons after the addition of 0–0.5 mM free sialyllactose (a sialylated oligosaccharide), with a decrease in the number of working units. After the addition of 0.5 mM sialyllactose, the cells carrying a bead loaded using optical tweezers exhibited stepwise movements with force increments. The force increments ranged from 1 to 2 picoNewtons. Considering the 70-nm step size, this small-unit force may be explained by the large gear ratio involved in the M. mobile gliding machinery.
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DOI:
10.1016/j.bbrc.2005.03.168
发表时间:
2005-05-27
影响因子:
3.1
作者:
Hiratsuka, Y;Miyata, M;Uyeda, TQP
通讯作者:
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影响因子:
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DOI:
10.2142/biophysics.1.33
发表时间:
2005-01-01
期刊:
Biophysics (Nagoya-shi, Japan)
影响因子:
--
作者:
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通讯作者:
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影响因子:
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作者:
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