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Ectopic A-lattice seams destabilize microtubules
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Katsuki, Miho, Drummond, Douglas R. and Cross, R. A. (2014) Ectopic A-lattice seams destabilize microtubules. Nature Communications, Volume 5 . Article number 3094. doi:10.1038/ncomms4094
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WRAP_Drummond_ncomms4094.pdf - Published Version Available under License Creative Commons Attribution. Download (2306Kb) | Preview |
Official URL: http://dx.doi.org/10.1038/ncomms4094
Abstract
Natural microtubules typically include one A-lattice seam within an otherwise helically symmetric B-lattice tube. It is currently unclear how A-lattice seams influence microtubule dynamic instability. Here we find that including extra A-lattice seams in GMPCPP microtubules, structural analogues of the GTP caps of dynamic microtubules, destabilizes them, enhancing their median shrinkage rate by >20-fold. Dynamic microtubules nucleated by seeds containing extra A-lattice seams have growth rates similar to microtubules nucleated by B-lattice seeds, yet have increased catastrophe frequencies at both ends. Furthermore, binding B-lattice GDP microtubules to a rigor kinesin surface stabilizes them against shrinkage, whereas microtubules with extra A-lattice seams are stabilized only slightly. Our data suggest that introducing extra A-lattice seams into dynamic microtubules destabilizes them by destabilizing their GTP caps. On this basis, we propose that the single A-lattice seam of natural B-lattice MTs may act as a trigger point, and potentially a regulation point, for catastrophe.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QH Natural history | ||||
| Divisions: | Faculty of Medicine > Warwick Medical School > Biomedical Sciences > Cell & Developmental Biology Faculty of Medicine > Warwick Medical School |
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| Library of Congress Subject Headings (LCSH): | Microtubules | ||||
| Journal or Publication Title: | Nature Communications | ||||
| Publisher: | Nature Publishing Group | ||||
| ISSN: | 2041-1723 | ||||
| Official Date: | 27 February 2014 | ||||
| Dates: |
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| Volume: | Volume 5 | ||||
| Number of Pages: | 13 | ||||
| Article Number: | Article number 3094 | ||||
| DOI: | 10.1038/ncomms4094 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access | ||||
| Funder: | Association for International Cancer Research (AICR), Marie Curie Cancer Care | ||||
| Grant number: | 09-0221 (AICR) |
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