Download MendeleyCaskin2 is a novel talin- and Abi1-binding protein that promotes cell motility.
Wang, W., Atherton, P., Kreft, M., Te Molder, L., van der Poel, S., Hoekman, L., Celie, P., Joosten, R.P., Fassler, R., Perrakis, A., Sonnenberg, A.(2024) J Cell Sci 137
- PubMed: 38587458
- DOI: https://doi.org/10.1242/jcs.262116
- Primary Citation of Related Structures:
7ZW4 - PubMed Abstract:
Talin (herein referring collectively to talin 1 and 2) couples the actomyosin cytoskeleton to integrins and transmits tension to the extracellular matrix. Talin also interacts with numerous additional proteins capable of modulating the actin-integrin linkage and thus downstream mechanosignaling cascades. Here, we demonstrate that the scaffold protein Caskin2 interacts directly with the R8 domain of talin through its C-terminal LD motif. Caskin2 also associates with the WAVE regulatory complex to promote cell migration in an Abi1-dependent manner. Furthermore, we demonstrate that the Caskin2-Abi1 interaction is regulated by growth factor-induced phosphorylation of Caskin2 on serine 878. In MCF7 and UACC893 cells, which contain an amplification of CASKIN2, Caskin2 localizes in plasma membrane-associated plaques and around focal adhesions in cortical microtubule stabilization complexes. Taken together, our results identify Caskin2 as a novel talin-binding protein that might not only connect integrin-mediated adhesion to actin polymerization but could also play a role in crosstalk between integrins and microtubules.
Organizational Affiliation:
Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, Amsterdam 1066 CX, The Netherlands.
