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Comparative Study
. 2000 Oct;26(2):225-8.
doi: 10.1038/79965.

Human-mouse genome comparisons to locate regulatory sites

W W Wasserman  1 , M Palumbo, W Thompson, J W Fickett, C E Lawrence
Affiliations
Comparative Study

Human-mouse genome comparisons to locate regulatory sites

W W Wasserman et al. Nat Genet. 2000 Oct.

Abstract

Elucidating the human transcriptional regulatory network is a challenge of the post-genomic era. Technical progress so far is impressive, including detailed understanding of regulatory mechanisms for at least a few genes in multicellular organisms, rapid and precise localization of regulatory regions within extensive regions of DNA by means of cross-species comparison, and de novo determination of transcription-factor binding specificities from large-scale yeast expression data. Here we address two problems involved in extending these results to the human genome: first, it has been unclear how many model organism genomes will be needed to delineate most regulatory regions; and second, the discovery of transcription-factor binding sites (response elements) from expression data has not yet been generalized from single-celled organisms to multicellular organisms. We found that 98% (74/75) of experimentally defined sequence-specific binding sites of skeletal-muscle-specific transcription factors are confined to the 19% of human sequences that are most conserved in the orthologous rodent sequences. Also we found that in using this restriction, the binding specificities of all three major muscle-specific transcription factors (MYF, SRF and MEF2) can be computationally identified.

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