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Updated: Jun 17, 2026

Biophysical Characterization of Flagellar Motor Functions

Biophysical Characterization of Flagellar Motor Functions

Published on: January 18, 2017

[A functional flagella with a 6 + 0 pattern].

J Schrevel, C Besse

The Journal of Cell Biology

|September 1, 1975

Summary

The male gamete of Lecudina tuzetae possesses a unique 6+0 flagellar axoneme, demonstrating that movement can occur without central microtubules. This finding reveals novel mechanisms for flagellar motility and its evolutionary implications.

Area of Science:

Cell biology
Parasitology
Microscopy

Context:

The study investigates the ultrastructure and motility of the male gamete in the gregarine parasite Lecudina tuzetae.
Previous research on flagellar structure often assumes a 9+2 axoneme pattern.

Purpose:

To characterize the flagellar axoneme and motility of Lecudina tuzetae male gametes using transmission electron microscopy and microcinematography.
To elucidate the mechanism of flagellar movement in a 6+0 axoneme system.

Summary:

The male gamete of Lecudina tuzetae exhibits a 6+0 flagellar axoneme pattern, reduced chondriome, and abundant storage bodies.
Flagellar movement is undulating, three-dimensional, and slow (2s cycle time), with axoneme components similar to 9+2 pattern flagella.
The 6+0 pattern generates movement via dynein-tubulin interactions between peripheral doublets, without central microtubules.

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Biophysical Characterization of Flagellar Motor Functions

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Generation of Null Mutants to Elucidate the Role of Bacterial Glycosyltransferases in Bacterial Motility

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Impact:

This research demonstrates that a 6+0 axoneme can produce flagellar movement, challenging previous assumptions.
The findings offer insights into the molecular mechanisms of motility and energy supply in atypical flagella.
The study examines the phylogenetic significance of this unique flagellar structure in gregarines.