Members of the Wiscott–Aldrich syndrome protein (WASP) family bind to and subsequently activate the actin-related protein 2 and 3 (Arp2/3) complex and, together, these proteins are key mediators of actin polymerisation. Neural-WASP (N-WASP) activity is regulated by a number of different mechanisms, including through its interaction with phosphoinositides and small GTPases, tyrosine phosphorylation and an intramolecular interaction between its GTPase-binding (GBD), and verprolin, cofilin and acidic (VPA) domains. Kwang Chul Chung and co-workers (p. 67) now report an additional N-WASP regulatory mechanism that involves the proline-directed serine/threonine kinase DYRK1A (dual-specificity tyrosine-phosphorylation-regulated kinase 1A). They show that DYRK1A interacts with N-WASP and phosphorylates three threonine residues (Thr196, Thr202 and Thr259) in the DYRK1A GBD. This phosphorylation strengthens the interaction between the GBD and the VCA domain and locks N-WASP in an autoinhibited conformation that inhibits Arp2/3-mediated actin polymerisation. The overexpression of phosphomimetic N-WASP mutants inhibits the formation of filopodia and dendritic spines in COS-7 cells and primary hippocampal neurons, respectively. The authors conclude that, through phosphorylating N-WASP, DYRK1A contributes to the regulation of actin-based cellular processes.
New way to stop N-WASP
New way to stop N-WASP. J Cell Sci 1 January 2012; 125 (1): e103. doi:
Download citation file:
Advertisement
Cited by
Introducing our new Editors
We welcome three new Editors to Journal of Cell Science - Robert Parton, Richa Rikhy and Simon Cook. You can read more about them in the Editorial from our Editor-in-Chief Michael Way.
2024 Journal Meeting 'Diversity and Evolution in Cell Biology'
Registration is open for our 2024 Journal Meeting Diversity and Evolution in Cell Biology, which aims to bring together evolutionary biologists and cell biologists investigating diverse aspects of cellular physiology. Final registration deadline: 3 May 2024.
Workshop: Physics of the Early Embryonic Cell Divisions
Early-career researchers interested in the roles of nuclear lipids, apply now for one of the ten funded places at this Workshop, which will take place 11-14 November 2024. Application deadline: 17 May.
Reasons to submit to Journal of Cell Science
There are many benefits to publishing in Journal of Cell Science - read more about why you should choose JCS or visit our submission page now.
Propose a new Workshop for 2026
We are now accepting proposals for our 2026 Workshops programme. We aim to be responsive to the community and open to novel initiatives, so if you have a new idea for a biological workshop that you feel would work well, please apply. Applications deadline: 19 July 2024.