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FBP/SBP-851: BBa_K2425000

Open reading frame for Fructose 1,6/sedoheptulose 1,7 bisphosphatase from cyanobacteria Synechococcus sp. (WH8103 strain ) with a 32-amino acid (96 bp) N-terminal signal peptide for chloroplast destination and codon optimized for expression in Chlamydomonas reinhardtii. This protein is involved in the Calvin cycle, which is part of the carbohydrate biosynthesis pathway. The catalytic activities are: 1) D-fructose 1,6-bisphosphate + H2O = D-fructose 6-phosphate + phosphate // 2) Sedoheptulose 1,7-bisphosphate + H2O = sedoheptulose 7-phosphate + phosphate. This protein has been expressed in chloroplasts of tobacco plant cells using the same chloroplast signal peptide and demonstrated to improve carbon fixation and growth (Miyagawa et al., Nature Biotechnology 19(10):965-9, 2001). Transgenic tobacco plants showed enhanced photosynthetic efficiency and growth characteristics. Compared with wild-type tobacco, final dry matter and photosynthetic CO2 fixation of the transgenic plants were 1.5-fold and 1.24-fold higher, respectively. Levels of intermediates in the Calvin cycle and accumulation of carbohydrates were also higher than those in wild-type plants. The signal peptide corresponds to the 32 amino acid chloroplast transit sequence of the ribulose bisphosphate carboxylase/oxygenase activase preprotein from Chlamydomonas reinhardtii, required for translocation through the envelope of the chloroplast (Krimm et al., Eur. J. Biochem. 265:171-180,1999).

Note

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Inspiration

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