ArticleActa pharmacologica Sinica2016
An RNA-binding protein, RNP-1, protects microtubules from nocodazole and localizes to the leading edge during cytokinesis and cell migration in Dictyostelium cells.
Article in Acta pharmacologica Sinica, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- The RNA-binding protein RNP1A is essential and interacts with contractility kit proteins to facilitate cell mechanics.Journal of cell science · 2026Article
- Discovery and Quantitative Dissection of Cytokinesis Mechanisms Using Dictyostelium discoideum.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Abundantly expressed class of noncoding RNAs conserved through the multicellular evolution of dictyostelid social amoebas.Genome research · 2021Article
- The Unusual Suspects in Cytokinesis: Fitting the Pieces Together.Frontiers in cell and developmental biology · 2020Review
- Contractility kits promote assembly of the mechanoresponsive cytoskeletal network.Journal of cell science · 2019Article
- Mitotic-Spindle Organizing Protein MztA Mediates Septation Signaling by Suppressing the Regulatory Subunit of Protein Phosphatase 2A-ParA inFrontiers in microbiology · 2018Article
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Authors and funding
4 authors.
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Abstract
aimRNA-binding proteins are a large group of regulators (800-1000 in humans), some of which play significant roles in mRNA local translation. In this study, we analyzed the functions of the protein RNP-1, which was previously discovered in a genetic selection screen for nocodazole suppression.
methodsThe growth rates and the microtubule networks of Dictyostelium cells were assessed with or without nocodazole (10 μmol/L) in suspension culture. Fluorescent images of RNP-1-GFP and RFP-tubulin were captured when cells were undergoing cytokinesis, then the GFP signal intensity and distance to the nearest centrosome were analyzed by using a computer program written in Matlab
resultsOver-expression of RNP-1 rescued the growth defects caused by the microtubule-destabilizing agent nocodazole. Over-expression of RNP-1 protected microtubules from nocodazole treatment. In cells undergoing cytokinesis, the RNP-1 protein was localized to the polar regions of the cell cortex, and protein levels decreased proportionally as the power of the distance from the cell cortex to the nearest centrosome. In chemotactic cells, the RNP-1 protein localized to the leading edge of moving cells. Sequence analysis revealed that RNP-1 has two RNA-binding domains and is related to cytosolic poly(A)-binding proteins (PABPCs) in humans.
conclusionRNP-1 has roles in protecting microtubules and in directing cortical movement during cytokinesis and cell migration in Dictyostelium cells. The sequence similarity of RNP-1 to human PABPCs suggests that PABPCs may have similar functions in mammalian cells, perhaps in regulating microtubule dynamics and functions during cortical movement in cytokinesis and cell migration.
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