Mol. Cells 2009; 27(2): 135~142  DOI: 10.1007/s10059-009-0017-z
Ab ovo or de novo? Mechanisms of Centriole Duplication
Jadranka Loncarek, Alexey Khodjakov
Received December 22, 2009; Accepted December 26, 2009.; Published online February 20, 2009.
© The Korean Society for Molecular and Cellular Biology. All rights reserved.

ABSTRACT
The centrosome, an organelle comprising centrioles and associated pericentriolar material, is the major microtubule organizing center in animal cells. For the cell to form a bipolar mitotic spindle and ensure proper chromosome segregation at the end of each cell cycle, it is paramount that the cell contains two and only two centrosomes. Because the number of centrosomes in the cell is determined by the number of centrioles, cells have evolved elaborate mechanisms to control centriole biogenesis and to tightly coordinate this process with DNA replication. Here we review key proteins involved in centriole assembly, compare two major modes of centriole biogenesis, and discuss the mechanisms that ensure stringency of centriole number.
Keywords: centriole, centrosome, duplication, de novo

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