Publication: Characterization of a full-length cDNA clone encoding glutamine synthetase from rubber tree latex
Issued Date
1997-01-01
Resource Type
ISSN
09819428
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2-s2.0-0030902861
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Mahidol University
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SCOPUS
Bibliographic Citation
Plant Physiology and Biochemistry. Vol.35, No.2 (1997), 85-93
Suggested Citation
V. Pujade-Renaud, C. Perrot-Rechenmann, H. Chrestin, R. Lacrotte, J. Guern Characterization of a full-length cDNA clone encoding glutamine synthetase from rubber tree latex. Plant Physiology and Biochemistry. Vol.35, No.2 (1997), 85-93. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/17866
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Title
Characterization of a full-length cDNA clone encoding glutamine synthetase from rubber tree latex
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Abstract
A full-length cDNA clone (HbGS) encoding glutamine synthetase (GS, EC 6.3.1.2) was isolated from a Lambda Zap II library of ethylene-treated Hevea brasiliensis latex. Sequence analysis of this clone revealed an open reading frame corresponding to a 356 amino acid polypeptide. The deduced amino acid sequence showed 80-96% and 76% identity respectively with cytosolic and chloroplastic GS published sequences. These homologies and the lack of N-terminal leader peptide sequence strongly suggested that this clone encodes a cytosolic glutamine synthetase. Southern blot analysis demonstrated the existence of an intron(s) and suggested that the rubber tree GS is encoded by a small multigene family. The short-term kinetics of ethylene action on gene expression revealed marked accumulation of the corresponding GS mRNA in the latex cells of ethylene-treated newly tapped trees, compared to non-treated controls. Additionally, tapping itself was shown to slightly stimulate GS gene expression.