Abstract
EgT2RIP is a type 2 ribosome-inactivating protein isolated from oil palm (Elaeis guineensis Jacq.). Its transcript abundance was reported to be up-regulated in oil palm roots upon inoculation of pathogenic fungus Ganoderma boninense in a recent study. This study aims to produce an active recombinant EgT2RIP protein for biological studies. The DNA fragments encoding Chain A (CA) and Chain B (CB) of EgT2RIP were cloned individually in an expression vector. Soluble CA and partially soluble CB were expressed in Escherichia coli Rosetta-gami 2 (DE3). Purified recombinant CA and CB were associated in a cysteine/cystine reduced/oxidized system, yielding a heterodimer protein (AB). The AB protein showed growth inhibitory activity against breast cancer cell lines (MCF-7) as well as non-tumorigenic breast epithelial cell line (MCF-10A) at IC50 = 1.4 and 10.9 μg mL−1, respectively. The active protein produced from this study may have the potential to be used for treatment in medical and agricultural fields.
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Abbreviations
- AB:
-
Heterodimers of Chains A and B
- CA:
-
Chain A
- CB:
-
Chain B
- EST:
-
Expressed sequence tag
- RIP:
-
Ribosome inactivating protein
- SDS–PAGE:
-
Sodium dodecyl sulfate–polyacrylamide gel electrophoresis
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Acknowledgments
This project is funded by RUGS Initiative 6 (Grant No: 05-02-11-1408RU). We thank the Pathology Laboratory of Malaysian Palm Oil Board (MPOB, Malaysia) for providing the G. boninense PER71. Yung-Chie Tan was supported by Ministry of Science, Technology and Innovation (MOSTI) Malaysia under the National Science Fellowship (NSF).
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10989_2015_9485_MOESM1_ESM.docx
Supplementary material 1. Supplementary Fig. A Nucleotide sequence and deduced amino acid sequence of EgT2RIP. The predicted N-terminal signal peptide and linker peptide are underlined. The position of the putative translation termination codon is indicated by an asterisk (DOCX 17 kb)
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Tan, YC., Ho, WY., Alitheen, N.B. et al. Cloning and Expression of Oil Palm (Elaeis guineensis Jacq.) Type 2 Ribosome Inactivating Protein in Escherichia coli . Int J Pept Res Ther 22, 37–44 (2016). https://doi.org/10.1007/s10989-015-9485-5
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DOI: https://doi.org/10.1007/s10989-015-9485-5