Abstract
The microtubule motor cytoplasmic dynein performs multiple cellular functions; however, the regulation and targeting of the motor to different cargoes is not well understood. A biochemical interaction between the dynein intermediate chain subunit and the p150-Glued component of the dynein regulatory complex, dynactin, has supported the hypothesis that the intermediate chain is a key modulator of dynein attachment to cellular cargoes. In this report, we identify multiple intermediate chain polypeptides that cosediment with the 19S dynein complex and two differentially expressed transcripts derived from the single cytoplasmic dynein intermediate chain (Cdic) gene that differ in the 3′ untranslated region sequence. These results support previous observations of multiple Cdic gene products that may contribute to the specialization of dynein function. Most significantly, we provide genetic evidence that the interaction between the dynein intermediate chain and p150-Glued is functionally relevant. We use a genomic Cdic transgene to show that extra copies of the dynein intermediate chain gene act to suppress the rough eye phenotype of the mutant Glued1, a mutation in the p150-Glued subunit of dynactin. Furthermore, we show that the interaction between the dynein intermediate chain and p150-Glued is dependent on the dosage of the Cdic gene. This result suggests that the dynein intermediate chain may be a limiting component in the assembly of the dynein complex and that the regulation of the interaction between the dynein intermediate chain and dynactin is critical for dynein function.
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Dates
Type | When |
---|---|
Created | 12 years, 2 months ago (July 2, 2013, 7:43 p.m.) |
Deposited | 3 years, 6 months ago (Feb. 26, 2022, 9:40 p.m.) |
Indexed | 1 year, 3 months ago (May 6, 2024, 12:34 p.m.) |
Issued | 24 years, 10 months ago (Nov. 1, 2000) |
Published | 24 years, 10 months ago (Nov. 1, 2000) |
Published Print | 24 years, 10 months ago (Nov. 1, 2000) |
@article{Boylan_2000, title={A Molecular Genetic Analysis of the Interaction between the Cytoplasmic Dynein Intermediate Chain and the Glued (Dynactin) Complex}, volume={11}, ISSN={1939-4586}, url={http://dx.doi.org/10.1091/mbc.11.11.3791}, DOI={10.1091/mbc.11.11.3791}, number={11}, journal={Molecular Biology of the Cell}, publisher={American Society for Cell Biology (ASCB)}, author={Boylan, Kristin and Serr, Madeline and Hays, Tom}, editor={McIntosh, J. Richard}, year={2000}, month=nov, pages={3791–3803} }