Large clusters of co-expressed genes in the Drosophila genome

Alexander M. Boutanaev, Alla I. Kalmykova, Yuri Y. Shevelyov and Dmitry I. Nurminsky ()
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Alexander M. Boutanaev: Tufts University School of Medicine
Alla I. Kalmykova: Institute of Molecular Genetics, Russian Academy of Sciences
Yuri Y. Shevelyov: Institute of Molecular Genetics, Russian Academy of Sciences
Dmitry I. Nurminsky: Tufts University School of Medicine

Nature, 2002, vol. 420, issue 6916, 666-669

Abstract: Abstract Clustering of co-expressed, non-homologous genes on chromosomes implies their co-regulation. In lower eukaryotes, co-expressed genes are often found in pairs1,2. Clustering of genes that share aspects of transcriptional regulation has also been reported in higher eukaryotes3,4. To advance our understanding of the mode of coordinated gene regulation in multicellular organisms, we performed a genome-wide analysis of the chromosomal distribution of co-expressed genes in Drosophila. We identified a total of 1,661 testes-specific genes, one-third of which are clustered on chromosomes. The number of clusters of three or more genes is much higher than expected by chance. We observed a similar trend for genes upregulated in the embryo and in the adult head, although the expression pattern of individual genes cannot be predicted on the basis of chromosomal position alone. Our data suggest that the prevalent mechanism of transcriptional co-regulation in higher eukaryotes operates with extensive chromatin domains that comprise multiple genes.

Date: 2002
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DOI: 10.1038/nature01216

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