JGI-Led Team Sequences Frog Genome
A team of researchers led by investigators at the Department of Energy's Joint Genome Institute reported online today in Science that they have sequenced the first amphibian genome : that of the Western clawed frog Xenopus tropicalis . The international research team used shotgun sequencing to generate a draft version of the X. tropicalis genome, which they then compared with the human and chicken genomes. In the process, they found more than 20,000 protein-coding genes in the frog genome, as well as regions of synteny with humans and chickens, and a slew of transposable element sequences. And because amphibians diverged from the amniote lineage leading to mammals, birds, and reptiles some 360 million years ago, senior author Daniel Rokhsar, a researcher affiliated with JGI and the University of California at Berkeley, and his co-authors explained, information in the X. tropicalis genome is helping to reconstruct features found in the shared ancestor of these anima...