Expression of Acc-Royalisin Gene from Royal Jelly of Chinese Honeybee in Escherichia coli and Its Antibacterial Activity
- 1 February 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of Agricultural and Food Chemistry
- Vol. 58 (4), 2266-2273
- https://doi.org/10.1021/jf902574t
Abstract
Royalisin is an antibacterial peptide found in Royal Jelly. Two gene fragments of Chinese honeybee (Apis cerana cerana) head, 280 bp cDNA encoding pre-pro-Acc-royalisin (PPAR) of 95 amino acid residues, and 165 bp cDNA encoding mature Acc-royalisin (MAR) of 51 amino acid residues were cloned into the pGEX-4T-2 vector. They were then transformed individually into Escherichia coli for expression. Two expressed fusion proteins, glutathione S-transferase (GST)-PPAR of 36 kDa and GST-MAR of 32 kDa were obtained, which were cross reacted with GST antibody accounting for up to 16.3% and 15.4% of bacterial protein, respectively. In addition, 41% of GST-PPAR and nearly 100% of GST-MAR were soluble proteins. Both lysates of the two purified fusion proteins displayed antibacterial activities, similar to that of nisin against Gram-positive bacteria strains, Staphylococcus aureus, Bacillus subtilis and Micrococcus luteus. MAR peptide released from the thrombin-cleaved GST-MAR fusion protein has a stronger antibacterial activity than that of GST-MAR fusion protein.Keywords
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