Universal Protein Families and the Functional Content of the Last Universal Common Ancestor (original) (raw)

Abstract.

The phylogenetic distribution of Methanococcus jannaschii proteins can provide, for the first time, an estimate of the genome content of the last common ancestor of the three domains of life. Relying on annotation and comparison with reference to the species distribution of sequence similarities results in 324 proteins forming the universal family set. This set is very well characterized and relatively small and nonredundant, containing 301 biochemical functions, of which 246 are unique. This universal function set contains mostly genes coding for energy metabolism or information processing. It appears that the Last Universal Common Ancestor was an organism with metabolic networks and genetic machinery similar to those of extant unicellular organisms.

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Authors and Affiliations

  1. Department of Microbiology, University of Illinois at Urbana–Champaign, 407 South Goodwin Avenue, Urbana IL 61801, USA, , , , , , US
    Nikos Kyrpides
  2. Mathematics and Computer Science Division, Argonne National Laboratory, 9700 South Case Avenue, Argonne IL 60439, USA, , , , , , US
    Ross Overbeek
  3. Computational Genomics Group, Research Programme, The European Bioinformatics Institute, EMBL Cambridge Outstation, Wellcome Trust Genome Campus, Cambridge CB10 1SD, UK, , , , , , GB
    Christos Ouzounis

Authors

  1. Nikos Kyrpides
  2. Ross Overbeek
  3. Christos Ouzounis

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Kyrpides, N., Overbeek, R. & Ouzounis, C. Universal Protein Families and the Functional Content of the Last Universal Common Ancestor.J Mol Evol 49, 413–423 (1999). https://doi.org/10.1007/PL00006564

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