PMID: 12773636May 30, 2003Paper

Sucrose synthase catalyzes the de novo production of ADPglucose linked to starch biosynthesis in heterotrophic tissues of plants

Plant & Cell Physiology
Edurne Baroja-FernandezJavier Pozueta-Romero

Abstract

By using barley seeds, developmental changes of ADPglucose (ADPG)-producing sucrose synthase (SS) and ADPG pyrophosphorylase (AGPase) have been compared with those of UDPglucose (UDPG), ADPG, sucrose (Suc) and starch contents. Both ADPG-synthesizing SS and AGPase activity patterns were found to correlate well with those of ADPG and starch contents. Remarkably, however, maximal activities of ADPG-synthesizing SS were found to be several fold higher than those of AGPase throughout seed development, the highest rate of starch accumulation being well accounted for by SS. Kinetic analyses of SS from barley endosperms and potato tubers in the Suc cleavage direction showed similar K(m) values for ADP and UDP, whereas apparent affinity for Suc was shown to be higher in the presence of UDP than with ADP. Moreover, measurements of transglucosylation activities in starch granules incubated with purified SS, ADP and [U-(14)C]Suc revealed a low inhibitory effect of UDP. The ADPG and UDPG contents in the transgenic S-112 SS and starch deficient potato mutant [Zrenner et al. (1995) Plant J. 7: 97] were found to be 35% and 30% of those measured in wild-type plants, whereas both glucose-1-phosphate and glucose-6-phosphate contents were found to...Continue Reading

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Citations

Jun 29, 2005·Journal of Molecular Evolution·Xuemei JiJohn Bennett
Aug 25, 2004·Proceedings of the National Academy of Sciences of the United States of America·Edurne Baroja-FernándezJavier Pozueta-Romero
Dec 21, 2011·Proceedings of the National Academy of Sciences of the United States of America·Edurne Baroja-FernándezJavier Pozueta-Romero
Sep 20, 2008·Plant & Cell Physiology·Francisco José MuñozJavier Pozueta-Romero
Mar 18, 2008·Plant Physiology·Diana PersiaMauro Cresti
Nov 28, 2012·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Pallavi Mishra, R S Dubey
Dec 15, 2015·Biotechnology Advances·Katharina SchmölzerBernd Nidetzky
Jan 19, 2016·Journal of Proteomics·Mingming YangXiang Gao
Dec 1, 2012·FEBS Letters·Carlos M FigueroaMiguel A Ballicora
Jun 15, 2007·Phytochemistry·Ana Paula AlonsoMartine Dieuaide-Noubhani
Mar 26, 2016·Frontiers in Plant Science·Mariateresa VolpicellaLuigi R Ceci
Sep 20, 2012·Physiologia Plantarum·Pengmin LiLailiang Cheng
Apr 8, 2015·Applied Microbiology and Biotechnology·Margo DiricksTom Desmet
Aug 18, 2004·Journal of Plant Physiology·A B Jha, R S Dubey
Jul 6, 2013·Biotechnology Advances·Abdellatif BahajiJavier Pozueta-Romero
Jan 1, 2010·Annual Review of Food Science and Technology·Peter L Keeling, Alan M Myers
May 4, 2004·Plant Physiology and Biochemistry : PPB·Sandra MaticSusanne Widell
Jun 29, 2018·Proteomics·Ramamurthy Mahalingam
Feb 8, 2005·Plant & Cell Physiology·Ed EtxeberriaJavier Pozueta-Romero
Jun 14, 2005·Plant & Cell Physiology·Francisco José MuñozJavier Pozueta-Romero
Jan 26, 2006·Plant & Cell Physiology·Edurne Baroja-FernandezJavier Pozueta-Romero

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