TY - JOUR
T1 - Rice gibberellin-insensitive gene homolog, OsGAI, encodes a nuclear-localized protein capable of gene activation at transcriptional level
AU - Ogawa, M.
AU - Kusano, T.
AU - Katsumi, M.
AU - Sano, H.
N1 - Funding Information:
The authors thank Dr. K. Hiratsuka (Nara Institute of Science and Technology) for valuable discussion on GFP experiments, Drs. N.-H. Chua (Rockefeller University) and P. Spielhofer (University of Berne) for generous gift of the pGFP-2 plasmid, Drs. Y. Yamamoto (RIKEN), M. Matsui (RIKEN), and J. Carrington (Washington State University) for plasmids used for GAL4-dependent transactivation assays, and Dr. M. Moore for critical reading of the manuscript. This work was partly supported by a grant for Research for the Future Program (JSPS-RFTF96R160012) from the Japan Society for the Promotion of Science.
PY - 2000/3/7
Y1 - 2000/3/7
N2 - This paper reports isolation and properties of a rice gene, OsGAI, a putative homolog of the GAI of Arabidopsis thaliana. OsGAI encodes a polypeptide of 625 amino acids, which shows 53-55% identity to GAI and RGA from A. thaliana, and 85% identity to wheat rht-D1a and maize d8. Genomic DNA blot analysis indicated the OsGAI to be a single-copy gene in the rice genome. RNA blot hybridization showed that OsGAI transcripts increased within 6 h upon GA 3 but not ABA application. This GA-induced increment in OsGAI transcripts did not require de novo protein synthesis. High levels of OsGAI transcripts were detected in nodes, internodes, leaf sheaths and ears of adult plants and leaf sheaths of young seedlings, where GA enhances cell elongation and division. Transiently expressed OsGAI-GFP fusion protein located to the nucleus in onion epidermal cells. Transactivation assays clearly indicated that OsGAI protein is a transcriptional activator or a coactivator. (C) 2000 Elsevier Science B.V. All rights reserved.
AB - This paper reports isolation and properties of a rice gene, OsGAI, a putative homolog of the GAI of Arabidopsis thaliana. OsGAI encodes a polypeptide of 625 amino acids, which shows 53-55% identity to GAI and RGA from A. thaliana, and 85% identity to wheat rht-D1a and maize d8. Genomic DNA blot analysis indicated the OsGAI to be a single-copy gene in the rice genome. RNA blot hybridization showed that OsGAI transcripts increased within 6 h upon GA 3 but not ABA application. This GA-induced increment in OsGAI transcripts did not require de novo protein synthesis. High levels of OsGAI transcripts were detected in nodes, internodes, leaf sheaths and ears of adult plants and leaf sheaths of young seedlings, where GA enhances cell elongation and division. Transiently expressed OsGAI-GFP fusion protein located to the nucleus in onion epidermal cells. Transactivation assays clearly indicated that OsGAI protein is a transcriptional activator or a coactivator. (C) 2000 Elsevier Science B.V. All rights reserved.
KW - GAI
KW - Gibberellin
KW - Oryza sativa
KW - Transactivation
KW - VHIID
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U2 - 10.1016/S0378-1119(00)00018-4
DO - 10.1016/S0378-1119(00)00018-4
M3 - Article
C2 - 10713441
AN - SCOPUS:0034615579
VL - 245
SP - 21
EP - 29
JO - Gene
JF - Gene
SN - 0378-1119
IS - 1
ER -