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Vol. 11, Issue 3, 333-340, March 2001

REPORTS
First Pass Annotation of Promoters on Human Chromosome 22

Matthias Scherf,1,3,4 Andreas Klingenhoff,1,3 Kornelie Frech,3 Kerstin Quandt,3 Ralf Schneider,1 Korbinian Grote,1 Matthias Frisch,3 Valérie Gailus-Durner,1 Alexander Seidel,1 Ruth Brack-Werner,2 and Thomas Werner1,3

GSF-National Research Center for Environment and Health, 1 Institute of Mammalian Genetics; 2 Institute of Molecular Virology, Neuherberg, Germany; 3 Genomatix Software GmbH, Munich, Germany

The publication of the first almost complete sequence of a human chromosome (chromosome 22) is a major milestone in human genomics. Together with the sequence, an excellent annotation of genes was published which certainly will serve as an information resource for numerous future projects. We noted that the annotation did not cover regulatory regions; in particular, no promoter annotation has been provided. Here we present an analysis of the complete published chromosome 22 sequence for promoters. A recent breakthrough in specific in silico prediction of promoter regions enabled us to attempt large-scale prediction of promoter regions on chromosome 22. Scanning of sequence databases revealed only 20 experimentally verified promoters, of which 10 were correctly predicted by our approach. Nearly 40% of our 465 predicted promoter regions are supported by the currently available gene annotation. Promoter finding also provides a biologically meaningful method for "chromosomal scaffolding", by which long genomic sequences can be divided into segments starting with a gene. As one example, the combination of promoter region prediction with exon/intron structure predictions greatly enhances the specificity of de novo gene finding. The present study demonstrates that it is possible to identify promoters in silico on the chromosomal level with sufficient reliability for experimental planning and indicates that a wealth of information about regulatory regions can be extracted from current large-scale (megabase) sequencing projects. Results are available on-line at http://genomatix.gsf.de/chr22/.

4 Corresponding author.

11:333-340 ©2001 by Cold Spring Harbor Laboratory Press  ISSN 1088-9051/01 $5.00
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