Epigenetic and cell cycle control of centromere inheritance

Dissertation presented to obtain the Ph.D degree in Biology, Cell Biology

Inheritance of histone H3 variants across mitotic cell divisions

Dissertation presented to obtain the Ph.D degree in Molecular Biology.

Quantitative Centromere Epigenetics

A PhD is like a box of chocolates, …… and in this thesis I will present what I got. My work has been focused on a cellular structure that is essential for accurate genome inheritance: the centromere. Centromeres are chromosomal domains that do not rely on the presence of any specific DNA sequence. Rather, they are determined by the presence of a histone variant called CENP-A. Stable transmission of CENP-A containing chromatin is accomplished through 1) an unusually high level of protein stability, 2) selfdirected recruitment of nascent CENP-A near existing molecules, and 3) strict cell cycle regulation of assembly. Together, these features lead to a self-sustaining loop that allows for epigenetic maintenance of centromeres.(...)