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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Cloning and expression in Escherichia coli of the gene coding for phytoene synthase from the cyanobacterium Synechocystis sp. PCC6803.

The gene coding for the carotenoid biosynthesis enzyme phytoene synthase (pys) has been cloned from the unicellular cyanobacterium Synechocystis sp. PCC6803. The gene has been functionally expressed in Escherichia coli, where it directs the biosynthesis of phytoene from geranylgeranyl pyrophosphate (GGPP). Analysis of the sequence of the Synechocystis pys protein deduced from the gene sequence shows that it is highly homologous to the tomato and Synechococcus phytoene synthases and shows conserved domains with other bacterial phytoene synthase enzymes. The pys gene starts 60 nucleotides downstream of the pds gene (which codes for phytoene desaturase). However, it seems to be transcribed mainly from its own promoters, because insertions that disrupt the pds gene do not affect significantly the expression of the pys gene.[1]

References

  1. Cloning and expression in Escherichia coli of the gene coding for phytoene synthase from the cyanobacterium Synechocystis sp. PCC6803. Martínez-Férez, I., Fernández-González, B., Sandmann, G., Vioque, A. Biochim. Biophys. Acta (1994) [Pubmed]
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