Xenopus laevis nucleotide binding protein 1 (xNubp1) is important for convergent extension movements and controls ciliogenesis via regulation of the actin cytoskeleton
| Autor: | Ioannou, Androulla, Santama, Niovi, Skourides, Paris A. |
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| Přispěvatelé: | Santama, Niovi [0000-0002-8370-8674], Skourides, Paris A. [0000-0003-3502-5729] |
| Rok vydání: | 2012 |
| Předmět: |
molecular cloning
cell migration Xenopus Arp2/3 complex cell maturation animal cell Xenopus Proteins Actin remodeling of neurons Xenopus laevis cell motion Cell Movement Morphogenesis Basal body cell elongation neural tube article protein function nucleotide binding protein 1 Cell biology unclassified drug Actin Cytoskeleton female ciliated epithelium Profilin priority journal Female RhoA guanine nucleotide binding protein down regulation actin filament Nubp1 regulatory mechanism intercalation complex animal experiment embryo protein localization Biology nervous tissue GTP-Binding Proteins epidermis Basal bodies Cell cortex kinetosome Animals controlled study Cilia Molecular Biology protein expression axoneme Actin nonhuman Ciliogenesis Actin remodeling Cell Biology enzyme activation molecular docking Actin cytoskeleton Convergent extension nucleotide binding protein protein analysis biology.protein egg MDia1 Developmental Biology cell structure |
| Zdroj: | Developmental biology Dev.Biol. |
| ISSN: | 1095-564X |
| Popis: | Nucleotide binding protein 1 (Nubp1) is a highly conserved phosphate loop (P-loop) ATPase involved in diverse processes including iron-sulfur protein assembly, centrosome duplication and lung development. Here, we report the cloning, expression and functional characterization of Xenopus laevis Nubp1. We show that xNubp1 is expressed maternally, displays elevated expression in neural tissues and is required for convergent extension movements and neural tube closure. In addition, xNubp1knockdown leads to defective ciliogenesis of the multi-ciliated cells of the epidermis as well as the monociliated cells of the gastrocoel roof plate. Specifically, xNubp1 is required for basal body migration, spacing and docking in multi-ciliated cells and basal body positioning and axoneme elongation in monociliated gastrocoel roof plate cells. Live imaging of the different pools of actin and basal body migration during the process of ciliated cell intercalation revealed that two independent pools of actin are present from the onset of cell intercalation an internal network surrounding the basal bodies, anchoring them to the cell cortex and an apical pool of punctate actin which eventually matures into the characteristic apical actin network. We show that xNubp1 colocalizes with the apical actin network of multiciliated cells and that problems in basal body transport in xNubp1 morphants are associated with defects of the internal network of actin, while spacing and polarity issues are due to a failure of the apical and sub-apical actin pools to mature into a network. Effects of xNubp1 knockdown on the actin cytoskeleton are independent of RhoA localization and activation, suggesting that xNubp1 may have a direct role in the regulation of the actin cytoskeleton. © 2013 The Authors. 380 243 258 Cited By :10 |
| Databáze: | OpenAIRE |
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