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Cyclical bending of two outer-doublet microtubules in frayed axonemes ofChlamydomonas

โœ Scribed by Kamiya, Ritsu ;Okagaki, Tsuyoshi

Book ID
102806768
Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
544 KB
Volume
6
Category
Article
ISSN
0886-1544

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โœฆ Synopsis

When detergent-extracted cell models of Chlamydornonas reinhardtii were left in the presence of 1 mM Mg-ATP for more than 30 minutes flagellar axonemes tended to become frayed into fine bundles of microtubules. Under such conditions, bundles made up of a pair of outer-doublet microtubules displayed oscillatory bending movements of low (< 2 Hz) frequencies. The two doublet microtubules underwent association-dissociation cycles coupled with gross bending movement. A model is presented to explain this phenomenon by unidirectional sliding interaction between the two microtubules.

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Beat frequency difference between the two flagella ofChlamydomonas depends on the attachment site of outer dynein arms on the outer-doublet microtubules
โœ Takada, Saeko ;Kamiya, Ritsu ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 210 KB

The two flagella of Chlamydomonas, although similar to each other at first glance, differ in functional properties. A clear difference exists in the beat frequency: the trans-flagellum (the one farthest from the eyespot) beats with 30-40% higher frequency than the cis-flagellum (the one nearest to t