Abstract
The sister chromatid cohesion apparatus mediates physical pairing of duplicated chromosomes. This pairing is essential for appropriate distribution of chromosomes into the daughter cells upon cell division. Recent evidence shows that the cohesion apparatus, which is a significant structural component of chromosomes during interphase, also affects gene expression and development. The Cornelia de Lange (CdLS) and Roberts/SC phocomelia (RBS/SC) genetic syndromes in humans are caused by mutations affecting components of the cohesion apparatus. Studies in Drosophila suggest that effects on gene expression are most likely responsible for developmental alterations in CdLS. Effects on chromatid cohesion are apparent in RBS/SC syndrome, but data from yeast and Drosophila point to the likelihood that changes in expression of genes located in heterochromatin could contribute to the developmental deficits.
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Acknowledgements
The author thanks Ian Krantz, Laird Jackson, Uta Francke, Joel Eissenberg, and Tom Strachan for interesting discussions and comments on the manuscript, and Sergey Korolev for help with structural analysis of the Smc1L1 mutations. Work in the author’s laboratory is supported by grants from the NIH, March of Dimes and CdLS Foundation (USA).
Note added in proof
While this review was in proof, papers describing S. pombe and human homologues of the Scc4 adherin subunit were published:
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Watrin E, Schleiffer A, Tanaka K, Eisenhaber F, Nasmyth K, Peters JM (2006) Human Scc4 is required for cohesin binding to chromatin, sister-chromatid cohesion, and mitotic progression. Curr Biol 16:863–874.
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Dorsett, D. Roles of the sister chromatid cohesion apparatus in gene expression, development, and human syndromes. Chromosoma 116, 1–13 (2007). https://doi.org/10.1007/s00412-006-0072-6
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DOI: https://doi.org/10.1007/s00412-006-0072-6