Vol 13, Issue 1, 73-80, January 2003
LETTER
Strategies and Tools for Whole-Genome Alignments
Olivier Couronne1,3,
Alexander Poliakov1,
Nicolas Bray1,
Tigran Ishkhanov1,
Dmitriy Ryaboy1,
Edward Rubin1,
Lior Pachter2,3 and
Inna Dubchak1
1Lawrence Berkeley National Laboratory, Berkeley,
California 94720, USA; 2Department of Mathematics,
University of California at Berkeley,
Berkeley, California 94720, USA
The availability of the assembled mouse genome makes possible, for
the first time, an alignment and comparison of two large vertebrate
genomes. We investigated different strategies of alignment for the
subsequent analysis of conservation of genomes that are effective for
assemblies of different quality. These strategies were applied to the
comparison of the working draft of the human genome with the Mouse
Genome Sequencing Consortium assembly, as well as other intermediate
mouse assemblies. Our methods are fast and the resulting alignments
exhibit a high degree of sensitivity, covering more than 90% of known
coding exons in the human genome. We obtained such coverage while
preserving specificity. With a view towards the end user, we developed
a suite of tools and Web sites for automatically aligning and
subsequently browsing and working with whole-genome comparisons. We
describe the use of these tools to identify conserved non-coding
regions between the human and mouse genomes, some of which have not
been identified by other methods.
3 Corresponding author.
E-MAIL ocouronne{at}lbl.gov; FAX (510) 486-5717. E-MAIL
lpachter{at}math.berkeley.edu.
Article and publication are at
http://www.genome.org/cgi/doi/10.1101/gr.762503.

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