2026-06-14T03:46:52Zhttps://repisalud.isciii.es/rest/oai/requestoai:repisalud.isciii.es:20.500.12105/119682024-09-27T08:18:25Zcom_20.500.12105_19604com_20.500.12105_2051col_20.500.12105_19605
Repisalud
author
Quijano, Carlos
author
Tomancak, Pavel
author
Lopez-Marti, Jesus
author
Suyama, Mikita
author
Bork, Peer
author
Milan, Marco
author
Torrents, David
author
Manzanares, Miguel
funder
Fundación BBVA
funder
European Molecular Biology Organization
funder
Ministerio de Ciencia e Innovación (España)
funder
Fundación ProCNIC
2021-02-22T13:38:54Z
2021-02-22T13:38:54Z
2008-12-16
Genome Biol. 2008; 9(12):R176
10.1186/gb-2008-9-12-r176
1465-6906
Genome Biology
19087263
http://hdl.handle.net/20.500.12105/11968
Background: The physical organization and chromosomal localization of genes within genomes is known to play an important role in their function. Most genes arise by duplication and move along the genome by random shuffling of DNA segments. Higher order structuring of the genome occurs in eukaryotes, where groups of physically linked genes are co-expressed. However, the contribution of gene duplication to gene order has not been analyzed in detail, as it is believed that co-expression due to recent duplicates would obscure other domains of co-expression.
Results: We have catalogued ordered duplicated genes in Drosophila melanogaster, and found that one in five of all genes is organized as tandem arrays. Furthermore, among arrays that have been spatially conserved over longer periods than would be expected on the basis of random shuffling, a disproportionate number contain genes encoding developmental regulators. Using in situ gene expression data for more than half of the Drosophila genome, we find that genes in these conserved clusters are co-expressed to a much higher extent than other duplicated genes.
Conclusions: These results reveal the existence of functional constraints in insects that retain copies of genes encoding developmental and regulatory proteins as neighbors, allowing their co-expression. This co-expression may be the result of shared cis-regulatory elements or a shared need for a specific chromatin structure. Our results highlight the association between genome architecture and the gene regulatory networks involved in the construction of the body plan.
eng
Selective maintenance of Drosophila tandemly arranged duplicated genes during evolution
journal article
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