Chromosome Replication and Segregation

A. Leonard,J. Grimwade

Published 2019 in Reference Module in Biomedical Sciences

ABSTRACT

Microorganisms accurately position newly replicated chromosomes within genetically identical daughters prior to cell division. New DNA synthesis initiates from specialized chromosomal sites, termed replication origins, and regulation of ordered interactions with initiator proteins ensures replication forks are properly timed and assembled only once per-cycle. In eukaryotic microbes, movement of newly replicated chromosomes requires a microtubule-based mitotic spindle, but chromosomal segregation during the cell cycle is less well understood in bacteria. The rapid separation of replication origins and active remodeling of chromosome structure suggest an intimate relationship between segregation mechanisms and the DNA replication machinery.

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