Interactome and F-Actin Interaction Analysis of Dictyostelium discoideum Coronin A

Fabrice, Tohnyui Ndinyanka and Fiedler, Thomas and Studer, Vera and Vinet, Adrien and Brogna, Francesco and Schmidt, Alexander and Pieters, Jean. (2020) Interactome and F-Actin Interaction Analysis of Dictyostelium discoideum Coronin A. International Journal of Molecular Sciences, 21 (4). p. 1469.

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Coronin proteins are evolutionary conserved WD repeat containing proteins that have been proposed to carry out different functions. In; Dictyostelium; , the short coronin isoform, coronin A, has been implicated in cytoskeletal reorganization, chemotaxis, phagocytosis and the initiation of multicellular development. Generally thought of as modulators of F-actin, coronin A and its mammalian homologs have also been shown to mediate cellular processes in an F-actin-independent manner. Therefore, it remains unclear whether or not coronin A carries out its functions through its capacity to interact with F-actin. Moreover, the interacting partners of coronin A are not known. Here, we analyzed the interactome of coronin A as well as its interaction with F-actin within cells and in vitro. Interactome analysis showed the association with a diverse set of interaction partners, including fimbrin, talin and myosin subunits, with only a transient interaction with the minor actin10 isoform, but not the major form of actin, actin8, which was consistent with the absence of a coronin A-actin interaction as analyzed by co-sedimentation from cells and lysates. In vitro, however, purified coronin A co-precipitated with rabbit muscle F-actin in a coiled-coil-dependent manner. Our results suggest that an in vitro interaction of coronin A and rabbit muscle actin may not reflect the cellular interaction state of coronin A with actin, and that coronin A interacts with diverse proteins in a time-dependent manner.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Infection Biology > Biochemistry (Pieters)
UniBasel Contributors:Pieters, Jean
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 Mar 2020 10:44
Deposited On:11 Mar 2020 10:44

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