Journal Article

Study of AtSUS2 Localization in Seeds Reveals a Strong Association with Plastids

Juan Gabriel Angeles Núñez, Jocelyne Kronenberger, Sylvie Wuillème, Loïc Lepiniec and Christine Rochat

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 49, issue 10, pages 1621-1626
Published in print October 2008 | ISSN: 0032-0781
Published online August 2008 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcn117
Study of AtSUS2 Localization in Seeds Reveals a Strong Association with Plastids

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Sucrose synthase (SUS) is a key enzyme in sucrose metabolism. This enzyme catalyzes the reversible conversion of sucrose and UDP to UDP-glucose and fructose. In the Arabidopsis SUS gene family (six members), SUS2 is strongly and specifically expressed in Arabidopsis seeds during the maturation phase. Using specific antibodies, we have shown that SUS2 is localized in the embryo, endosperm and seed coat with differential patterns. During the maturation phase, the SUS2 protein seems to be mainly co-localized with plastids in the embryo. This novel finding is discussed in relation to the role of this enzyme in storage organs.

Keywords: Arabidopsis thaliana; Plastids; Seeds; Sucrose synthase

Journal Article.  2680 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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