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Microtubule bundling by tau proteins in vivo: analysis of functional domains.

Authors: Kanai, Y  Chen, J  Hirokawa, N 
Citation: Kanai Y, etal., EMBO J. 1992 Nov;11(11):3953-61.
Pubmed: (View Article at PubMed) PMID:1396588

Tau varies both in the N-terminal region (three types) and in the C-terminal repeated microtubule binding domain (two types), generating six isoforms through alternative splicing. To understand the differences between the isoforms and to determine which domains are important for microtubule bundling, we performed transfection studies on fibroblasts using tau isoforms and deletion mutants to quantify their ability to bundle microtubules. By comparing the isoforms, we found that a longer N-terminal region induced microtubule bundling more efficiently, but changes in the microtubule binding domain did not. Mutants lacking the proline rich region or the repeated domain did not bind to microtubules. Although all the other mutants could bind to and bundle microtubules, deletion in the N-terminal neutral region or the first half of the C-terminal tail caused a significant decrease in microtubule bundling, indicating the importance of these regions in microtubule bundling.


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RGD Object Information
RGD ID: 10047156
Created: 2015-07-11
Species: All species
Last Modified: 2015-07-11
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.