Characterization of a novel rice bZIP protein which binds to the α-globulin promoter

Characterization of a novel rice bZIP protein which binds to the α-globulin promoter Many plant basic leucine-zipper (bZIP) proteins have been isolated several of which have been shown to play a role in seed-specific gene expression. We isolated a novel bZIP protein (REB) gene encoding 425 amino acid residues from rice endosperm, which is similar to Opaque-2 heterodimerizing protein (OHP) of maize. The gene product, termed REB, contains Pro- and Gly-rich regions at its N terminus, followed by the typical basic and leucine-repeat regions. Recombinant REB binds to the region from -754 to -562 in the α-globulin gene promoter, but not to promoters of other major storage genes such as glutelin, prolamin and albumin. The 5′ region of the α-globulin gene possesses three binding sites for REB, which were determined as GCCACGT(A/C)AG, by using synthetic oligonucleotides. A Super-shift assay using anti-REB antibody suggested that REB is a major DNA-binding protein for the α-globulin gene promoter in rice endosperm. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

Characterization of a novel rice bZIP protein which binds to the α-globulin promoter

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Publisher
Springer Journals
Copyright
Copyright © 1997 by Kluwer Academic Publishers
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1023/A:1005784717782
Publisher site
See Article on Publisher Site

Abstract

Many plant basic leucine-zipper (bZIP) proteins have been isolated several of which have been shown to play a role in seed-specific gene expression. We isolated a novel bZIP protein (REB) gene encoding 425 amino acid residues from rice endosperm, which is similar to Opaque-2 heterodimerizing protein (OHP) of maize. The gene product, termed REB, contains Pro- and Gly-rich regions at its N terminus, followed by the typical basic and leucine-repeat regions. Recombinant REB binds to the region from -754 to -562 in the α-globulin gene promoter, but not to promoters of other major storage genes such as glutelin, prolamin and albumin. The 5′ region of the α-globulin gene possesses three binding sites for REB, which were determined as GCCACGT(A/C)AG, by using synthetic oligonucleotides. A Super-shift assay using anti-REB antibody suggested that REB is a major DNA-binding protein for the α-globulin gene promoter in rice endosperm.

Journal

Plant Molecular BiologySpringer Journals

Published: Sep 29, 2004

References

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