title: Centrobin-tubulin interaction is required for centriole elongation and stability.
abstract: Centrobin is a daughter centriole protein that is essential for centrosome duplication. However, the molecular mechanism by which centrobin functions during centriole duplication remains undefined. In this study, we show that centrobin interacts with tubulin directly, and centrobin-tubulin interaction is pivotal for the function of centrobin during centriole duplication. We found that centrobin is recruited to the centriole biogenesis site via its interaction with tubulins during the early stage of centriole biogenesis, and its recruitment is dependent on hSAS-6 but not centrosomal P4.1-associated protein (CPAP) and CP110. The function of centrobin is also required for the elongation of centrioles, which is likely mediated by its interaction with tubulin. Furthermore, disruption of centrobin-tubulin interaction led to destabilization of existing centrioles and the preformed procentriole-like structures induced by CPAP expression, indicating that centrobin-tubulin interaction is critical for the stability of centrioles. Together, our study demonstrates that centrobin facilitates the elongation and stability of centrioles via its interaction with tubulins.
authors.affiliation: Department of Medicine, NorthShore Research Institute, University of Chicago Pritzker School of Medicine, Evanston, IL 60201, USA.
authors.forename: Radhika
authors.initials: R
authors.lastname: Gudi
authors.forename: Chaozhong
authors.initials: C
authors.lastname: Zou
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Qingshen
authors.initials: Q
authors.lastname: Gao
mesh_terms: D018797:Cell Cycle Proteins / Q000235:genetics / Q000378:metabolism*; D002502:Centrioles / Q000187:drug effects / Q000378:metabolism*; D005455:Fluorescent Antibody Technique; D057809:HEK293 Cells; D006367:HeLa Cells; D006801:Humans; D006918:Hydroxyurea / Q000494:pharmacology; D008869:Microtubule-Associated Proteins / Q000378:metabolism; D010750:Phosphoproteins / Q000378:metabolism; D011485:Protein Binding; D054730:Protein Interaction Domains and Motifs; D025941:Protein Interaction Mapping; D055503:Protein Multimerization; D034622:RNA Interference; D014162:Transfection; D014404:Tubulin / Q000378:metabolism*
chemical_list: C467559:CCP110 protein, human; C414735:CENPJ protein, human; C507203:CNTROB protein, human; D018797:Cell Cycle Proteins; D008869:Microtubule-Associated Proteins; D010750:Phosphoproteins; C497202:SASS6 protein, human; D014404:Tubulin; D006918:Hydroxyurea