Rapid evolutionary innovation during an Archaean genetic expansion

Lawrence A. David and Eric J. Alm ()
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Lawrence A. David: Computational & Systems Biology Initiative, Massachusetts Institute of Technology
Eric J. Alm: Computational & Systems Biology Initiative, Massachusetts Institute of Technology

Nature, 2011, vol. 469, issue 7328, 93-96

Abstract: Prehistory is in the genes Hidden in the modern-day genomes of today's living organisms are the imprints of ancient biogeochemical events. Lawrence David and Eric Alm have developed a new algorithm designed to reconstruct ancient genomes, taking into account the confounding effects of horizontal gene transfer and phylogenetic uncertainty. Applying this to around 100,000 gene sequences from present-day organisms, they find the genetic imprints of major events in Earth's history, including the gradual rise of oxygen starting more than 2.5 billion years ago, and a previously unreported brief but massive expansion in genetic diversity in the Archaean, more than 2 billion years before the Cambrian explosion.

Date: 2011
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DOI: 10.1038/nature09649

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