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The Characterization of Two New Clusters of Duplicated Genes Suggests a ‘Lego’ Organization of the YeastSaccharomyces cerevisiae Chromosomes

✍ Scribed by Feuermann, M.; de Montigny, J.; Potier, S.; Souciet, J.-L.

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
129 KB
Volume
13
Category
Article
ISSN
0749-503X

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✦ Synopsis

The systematic sequencing of 42,485 bp of yeast chromosome VII (nucleotides 377948 to 420432) has revealed the presence of 27 putative open reading frames (ORFs) coding for proteins of at least 100 amino acids. The degree of redundancy observed is elevated since five of the 27 ORFs are duplications of a previously identified gene. These duplicated copies may be classified in two types of cluster organization. The first type includes genes sharing a significant level of identity in the amino acid sequences of their predicted protein product. They are recovered on two different chromosomes, transcribed in the same orientation and the distance between them is conserved. The second type of cluster is based on one gene unit tandemly repeated. This duplication is itself repeated elsewhere in the genome. The level of nucleic acid identity is high within the coding sequence and the non-coding region between the two repeats. In addition, the basic gene unit is recovered many times in the genome and is a component of a multigene family of unknown function. These organizations in clusters of genes suggest a 'Lego organization' of the yeast chromosomes, as recently proposed for the genome of plants (Moore, 1995). The sequence is deposited in the Yeast Genome Databank under Accession Number from Z72562 to Z72586.

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