Abstract: Bee venom phospholipase A₂ (BvPLA₂) is a lipolytic enzyme that catalyzes the hydrolysis of the sn-2 acyl bond of glycerophospholipids to liberate free fatty acids and lysophospholipids. In this work, a new BvPLA₂ (AccPLA₂) gene from the Chinese honeybee (Apis cerana cerana) venom glands was inserted into bacmid to construct a recombinant transfer vector. Tn-5B-4 (Tn) cells were transfected with the recombinant bacmid DNA for expression. Sodium dodecylsulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis revealed a double band with molecular weights of 16 and 18 kDa. Products of hexahistidine AccPLA₂ fusion protein accumulated up to 5.32% of the total cellular proteins. The AccPLA₂ fusion protein was cross reactive with the anti-AmPLA₂ (BvPLA₂ of the European honeybee, Apis mellifera) polyclonal serum. The reaction resulted in a double glycosylation band, which agrees with the band generated by the native AmPLA₂ in Western blot analysis. The PLA₂ activity of the total extracted cellular protein in the hydrolyzing egg yolk is about 3.16 μmol/(min·mg). In summary, the recombinant AccPLA₂ protein, a native BvPLA₂-like structure with corresponding biological activities, can be glycosylated in Tn cells. These findings provided fundamental knowledge for potential genetic engineering to produce AccPLA₂ in the pharmaceutical industry.

Key words: Apis cerana cerana, Bee venom phospholipase A₂ (BvPLA₂), Insect cell, Expression

Please provide your name, email address and a comment

Your Name: Affili: E-Mail Address:

Comment (Please comment in English):


Verification Code(click to change a pic):