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. 1979 Sep;76(9):4566–4570. doi: 10.1073/pnas.76.9.4566

Telomere replication, kinetochore organizers, and satellite DNA evolution.

G P Holmquist, B Dancis
PMCID: PMC411619  PMID: 291989

Abstract

Robertsonian rearrangements demonstrate one-break chromosome rearrangement and the reversible appearance and disappearance of telomeres and centromeres. Such events are quite discordant with classical cytogenetic theories, which assume all chromosome rearrangements to require at least two breaks and consider centromeres and telomeres as immutable structures rather than structures determined by mutable DNA sequences. Cytogenetic data from spontaneous and induced telomere-telomere fusions in mammals support a molecular model of terminal DNA synthesis in which all telomeres are similar and recombine before replication and subsequent separation. This, along with evidence for a hypothetical DNA sequence, the kinetochore organizer, readily explains latent telomeres, latent centromeres, and reversible (one-break) Robertsonian rearrangements. A second model, involving simply recombination between like satellite DNA sequences on different chromosomes, explains not only how one satellite can simultaneously evolve on different chromosomes, but also why satellite DNA is usually located near centromeres or telomeres and why it maintains a preferred orientation with respect to the centromere.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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