Ipsilateral restriction of chromosome movement along a centrosome, and apical-basal axis during the cell cycle

Abstract

AbstractIndividual homologous chromosomes are spatially segregated into haploid chromosome sets along the centrosome axis in an antipairing configuration. Disruption of the antipairing pattern occurs in cancer cells. However, little is known about how this spatial organization of chromosomes is established or maintained. Here, we report that there is a zone of diminished interchromosomal linkage and centromere components between haploid sets in primary and established human epithelial cell lines. Using 4-Dimensional live cell imaging analysis of centromere and centrosome tracking, we show ipsilateral restriction of chromosome oscillations along the diminished zone, coincident with the centrosome and apical-basal axis from mitosis onset to G1 interphase. We propose a biophysical model of axis-dependent ipsilateral restriction of chromosome oscillations for haploid set organization.