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  • Title: Citron kinase - renaissance of a neglected mitotic kinase.
    Author: D'Avino PP.
    Journal: J Cell Sci; 2017 May 15; 130(10):1701-1708. PubMed ID: 28468989.
    Abstract:
    Cell division controls the faithful segregation of genomic and cytoplasmic materials between the two nascent daughter cells. Members of the Aurora, Polo and cyclin-dependent (Cdk) kinase families are known to regulate multiple events throughout cell division, whereas another kinase, citron kinase (CIT-K), for a long time has been considered to function solely during cytokinesis, the last phase of cell division. CIT-K was originally proposed to regulate the ingression of the cleavage furrow that forms at the equatorial cortex of the dividing cell after chromosome segregation. However, studies in the last decade have clarified that this kinase is, instead, required for the organization of the midbody in late cytokinesis, and also revealed novel functions of CIT-K earlier in mitosis and in DNA damage control. Moreover, CIT-K mutations have recently been linked to the development of human microcephaly, and CIT-K has been identified as a potential target in cancer therapy. In this Commentary, I describe and re-evaluate the functions and regulation of CIT-K during cell division and its involvement in human disease. Finally, I offer my perspectives on the open questions and future challenges that are necessary to address, in order to fully understand this important and yet unjustly neglected mitotic kinase.
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