DOI: 10.1083/jcb.149.4.811. The Condensin Complex Governs Chromosome Condensation and Mitotic Transmission of Rdna

The Condensin Complex Governs Chromosome Condensation and Mitotic Transmission of Rdna

10.1083/jcb.149.4.811

Crossref journal-article

Rockefeller University Press

The Journal of Cell Biology (291)

Abstract

We have characterized five genes encoding condensin components in Saccharomyces cerevisiae. All genes are essential for cell viability and encode proteins that form a complex in vivo. We characterized new mutant alleles of the genes encoding the core subunits of this complex, smc2-8 and smc4-1. Both SMC2 and SMC4 are essential for chromosome transmission in anaphase. Mutations in these genes cause defects in establishing condensation of unique (chromosome VIII arm) and repetitive (rDNA) regions of the genome but do not impair sister chromatid cohesion. In vivo localization of Smc4p fused to green fluorescent protein showed that, unexpectedly, in S. cerevisiae the condensin complex concentrates in the rDNA region at the G2/M phase of the cell cycle. rDNA segregation in mitosis is delayed and/or stalled in smc2 and smc4 mutants, compared with separation of pericentromeric and distal arm regions. Mitotic transmission of chromosome III carrying the rDNA translocation is impaired in smc2 and smc4 mutants. Thus, the condensin complex in S. cerevisiae has a specialized function in mitotic segregation of the rDNA locus. Chromatin immunoprecipitation (ChIP) analysis revealed that condensin is physically associated with rDNA in vivo. Thus, the rDNA array is the first identified set of DNA sequences specifically bound by condensin in vivo. The biological role of higher-order chromosome structure in S. cerevisiae is discussed.

Bibliography

Freeman, L., Aragon-Alcaide, L., & Strunnikov, A. (2000). The Condensin Complex Governs Chromosome Condensation and Mitotic Transmission of Rdna. The Journal of Cell Biology, 149(4), 811â824.

Authors 3

Lita Freeman (first)
Luis Aragon-Alcaide (additional)
Alexander Strunnikov (additional)

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Dates

Type	When
Created	23 years ago (July 26, 2002, 12:45 p.m.)
Deposited	2 years, 1 month ago (July 22, 2023, 5:40 a.m.)
Indexed	1 week, 5 days ago (Aug. 12, 2025, 6:14 p.m.)
Issued	25 years, 3 months ago (May 15, 2000)
Published	25 years, 3 months ago (May 15, 2000)
Published Online	25 years, 3 months ago (May 15, 2000)
Published Print	25 years, 3 months ago (May 15, 2000)

Funders 0

None

BibTeX

@article{Freeman_2000, title={The Condensin Complex Governs Chromosome Condensation and Mitotic Transmission of Rdna}, volume={149}, ISSN={1540-8140}, url={http://dx.doi.org/10.1083/jcb.149.4.811}, DOI={10.1083/jcb.149.4.811}, number={4}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Freeman, Lita and Aragon-Alcaide, Luis and Strunnikov, Alexander}, year={2000}, month=may, pages={811–824} }

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