cDNA cloning and characterization of a mannose-binding lectin fromZingiber officinaleRoscoe (ginger) rhizomes |
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Authors: | Zhonghai Chen Guoyin Kai Xiaojun Liu Juan Lin Xiaofen Sun Kexuan Tang |
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Institution: | (1) State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, 200433 Shanghai, People’s Republic of China;(2) Plant Biotechnology Research Center, School of Agriculture and Biology, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Shanghai Jiao Tong University, 200030 Shanghai, People’s Republic of China |
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Abstract: | Using RNA extracted fromZingiber officinale rhizomes and primers designed according to the conservative regions of monocot mannose-binding lectins, the full-length cDNA
ofZ. officinale agglutinin (ZOA) was cloned by rapid amplification of cDNA ends (RACE). The full-length cDNA ofzoa was 746 bp and contained a 510 bp open reading frame (ORF) encoding a lectin precursor of 169 amino acids with a signal peptide.
ZOA was a mannose-binding lectin with three typical mannose-binding sites (QDNY). Semi-quantitative RT-PCR analysis revealed
thatzoa expressed in all the tested tissues ofZ. officinale including leaf, root and rhizome, suggesting it to be a constitutively expressing form. ZOA protein was successfully expressed
inEscherichia coli with the molecular weight expected. To our knowledge, this is the first mannose-binding lectin cDNA cloned from the family
Zingiberaceae. Our results demonstrate that monocot mannose-binding lectins also occur within the family Zingiberaceae |
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Keywords: | Mannose-binding lectin RACE Zingiber officinale ZOA |
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