Relative velocity of sliding of microtubules by the action of Kinesin-5

Details Relative velocity of sliding of microtubules by the action of Kinesin-5 Relative velocity of sliding of microtubules by the action of Kinesin-5

2011-03-10

arxiv.org/abs/1103.1971v1

Physics

Biological Physics

6 pages Revtex, 5 eps figures

Scientific paper

Kinesin-5, also known as Eg5 in vertebrates is a processive motor with 4 heads, which moves on filamentous tracks called microtubules. The basic function of Kinesin-5 is to slide apart two anti-parallel microtubules by simultaneously walking on both the microtubules. We develop an analytical expression for the steady-state relative velocity of this sliding in terms of the rates of attachments and detachments of motor heads with the ATPase sites on the microtubules. We first analyse the motion of one pair of motor heads on one microtubule and then couple it to the motion of the other pair of motor heads of the same motor on the second microtubule to get the relative velocity of sliding.

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