Exploring photosynthesis evolution by comparative analysis of metabolic networks between chloroplasts and photosynthetic bacteria.

BMC Genomics
Zhuo WangLei Liu

Abstract

Chloroplasts descended from cyanobacteria and have a drastically reduced genome following an endosymbiotic event. Many genes of the ancestral cyanobacterial genome have been transferred to the plant nuclear genome by horizontal gene transfer. However, a selective set of metabolism pathways is maintained in chloroplasts using both chloroplast genome encoded and nuclear genome encoded enzymes. As an organelle specialized for carrying out photosynthesis, does the chloroplast metabolic network have properties adapted for higher efficiency of photosynthesis? We compared metabolic network properties of chloroplasts and prokaryotic photosynthetic organisms, mostly cyanobacteria, based on metabolic maps derived from genome data to identify features of chloroplast network properties that are different from cyanobacteria and to analyze possible functional significance of those features. The properties of the entire metabolic network and the sub-network that consists of reactions directly connected to the Calvin Cycle have been analyzed using hypergraph representation. Results showed that the whole metabolic networks in chloroplast and cyanobacteria both possess small-world network properties. Although the number of compounds and reaction...Continue Reading

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Citations

Jan 24, 2007·Bioinformatics·José C ClementeGabriel Valiente
Nov 8, 2008·IEEE/ACM Transactions on Computational Biology and Bioinformatics·Vincent LacroixMarie-France Sagot
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Apr 16, 2017·BMC Evolutionary Biology·Cecilio Valadez-CanoLuis Delaye

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Software Mentioned

SA
MCL

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