Abstract
The information provided by completely sequenced genomes can yield insights into the multi-level organization of organisms and their evolution. At the lowest level of molecular organization individual enzymes are formed, often through assembly of multiple polypeptides. At a higher level, sets of enzymes group into metabolic networks. Much has been learned about the relationship of species from phylogenetic trees comparing individual enzymes. In this article we extend conventional phylogenetic analysis of individual enzymes in different organisms to the organisms' metabolic networks. For this purpose we suggest a method that combines sequence information with information about the underlying reaction networks. A distance between pathways is defined as incorporating distances between substrates and distances between corresponding enzymes. The new analysis is applied to electron-transfer and amino acid biosynthesis networks yielding a more comprehensive understanding of similarities and differences between organisms.
Original language | English (US) |
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Pages (from-to) | 471-489 |
Number of pages | 19 |
Journal | Journal of Molecular Evolution |
Volume | 52 |
Issue number | 6 |
DOIs | |
State | Published - 2001 |
Keywords
- Aminoacid biosynthesis
- Electron transfer
- Metabolic networks
- Microbial genomes
- Phylogeny
ASJC Scopus subject areas
- Genetics
- Biochemistry
- General Biochemistry, Genetics and Molecular Biology
- Genetics(clinical)
- Ecology, Evolution, Behavior and Systematics
- Molecular Biology
- General Agricultural and Biological Sciences
- Agricultural and Biological Sciences (miscellaneous)