Cytoplasmic Dynein Antagonists with Improved Potency and Isoform Selectivity
Stephanie K See, Sascha Hoogendoorn, Andrew H Chung
1Laboratory of Chemistry and Cell Biology, Rockefeller University , New York City, New York 10065, United States.
ACS Chemical Biology
|November 12, 2015
Summary
Ciliobrevins are the first chemical inhibitors targeting cytoplasmic dyneins 1 and 2. New analogs show increased potency and selectivity, offering valuable tools for studying dynein motor protein functions in cellular processes.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Motors
Background:
- Cytoplasmic dyneins are essential minus-end-directed microtubule motors.
- Dynein 1 regulates diverse cellular transport, while dynein 2 is crucial for ciliary function.
- Chemical inhibitors are vital for studying motor protein mechanisms.
Purpose of the Study:
- To investigate the structure-activity relationship of ciliobrevins, the first dynein-specific inhibitors.
- To identify novel ciliobrevins with enhanced potency and selectivity for dynein isoforms.
- To validate these inhibitors as tools for studying dynein-dependent cellular processes.
Main Methods:
- In vitro and cellular assays to assess inhibitor activity.
- Structure-activity relationship studies of ciliobrevins.
- Analysis of effects on Hedgehog signaling, intraflagellar transport, and ciliogenesis.
Main Results:
- Ciliobrevins directly inhibit the heavy chains of both dynein 1 and dynein 2.
- Identification of key chemical motifs for dynein inhibition.
- Discovery of potent and dynein 2-selective ciliobrevin analogs.
Conclusions:
- Ciliobrevins are effective chemical probes for cytoplasmic dynein 1 and 2.
- Developed analogs provide improved tools for dissecting dynein 2-mediated functions.
- These inhibitors will advance research in cilia biology and related signaling pathways.
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