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Inhibitory effects of intact silkworm sericin on bacterial proliferation

机译:完整蚕丝蛋白对细菌增殖的抑制作用

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Sericins are derived from the outer layer of silk thread proteins of the common silkworm (Bombyx mori) and act as a glue to fix fibers of the developing cocoon. Although sericin has potential uses in various fields, including tissue engineering and the development of cosmetics, biological applications of intact sericin have yet to be identified. We previously developed transgenic silkworms that produce cocoons solely composed of sericin, from which we can readily prepare a solution of intact sericin. Here we report the effects of intact sericin on the proliferation of bacteria. The intact sericin does not kill bacteria, but colony size ofEscherichia colion culture media was reduced by up to 90% when cultured in the presence of intact sericin. In addition, treatment of intact sericin reduced colony size ofSalmonella enterica, indicating a potential inhibitory effect of intact sericin on growth in Gram-negative bacteria. However, Gram-positive bacteria, includingStaphylococcus aureusandBacillus subtilis, were not affected by intact sericin. Thus, our results indicate that the cell wall structure of different bacteria may influence their sensitivity to the inhibitory effects of sericin.
机译:血清素来自普通蚕(Bombyx Mori)的丝螺纹蛋白外层,并用作固定显影茧的纤维的胶水。虽然丝氨酸具有在各种领域的潜在用途,包括组织工程和化妆品的发展,但完整的胺蛋白的生物学应用尚未识别。我们以前开发的转基因蚕,其单独生产的可椰子由硅蛋白组成,从中可以容易地制备完整的丝氨酸的溶液。在这里,我们报告了完整的丝氨酸对细菌的增殖的影响。完整的硅粉不会杀死细菌,但在完整的丝裂蛋白存在下培养时,Colichia Colion培养基的殖民区大小减少了高达90%。此外,治疗完整的血清肠道菌塞肠道大小,表明完整的胺蛋白对革兰氏阴性细菌生长的潜在抑制作用。然而,革兰氏阳性细菌(包括含有酪蛋白Adusandbacillus枯草芽孢杆菌)不受完整的胺蛋白的影响。因此,我们的结果表明,不同细菌的细胞壁结构可能影响它们对血清抑制作用的敏感性。

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