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. 1984 Feb;81(3):771–775. doi: 10.1073/pnas.81.3.771

Interference of GTP hydrolysis in the mechanism of microtubule assembly: an experimental study.

M F Carlier, T L Hill, Y Chen
PMCID: PMC344918  PMID: 6583675

Abstract

This paper reports an experimental study of the interference of GTP hydrolysis in the mechanism of microtubule assembly, following the model and theory previously published [Hill, T. L. & Carlier, M.-F. (1983) Proc. Natl. Acad. Sci. USA 80, 7234-7238]. Results from dilution experiments show that microtubules depolymerize faster below the critical concentration than expected with a reversible polymerization model. The experimental plot of flux versus tubulin concentration exhibits a slope discontinuity at the critical concentration, in agreement with the theory. Theoretical points calculated by the Monte Carlo method can be fitted qualitatively to the data. A consequence of this peculiar dynamic behavior of microtubules is that the ratio of tubulin dissociation and association rate constants measured, respectively, below and above the critical concentration does not yield the true value of the critical concentration. It is emphasized that the presence of GTP at microtubule ends is necessary to maintain the stability of the polymer.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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