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Production of Human Type II Collagen Using an Efficient Baculovirus-silkworm Multigene Expression System

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Specialty Genetics
Date 2016 Sep 28
PMID 27669694
Citations 6
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Abstract

Human type II collagen is a macromolecular protein found throughout the human body. The baculovirus expression vector system is one of the most ideal systems for the routine production and display of recombinant eukaryotic proteins in insect, larvae, and mammalian cells. We use this system to express a full-length gene, human type II collagen cDNA (4257 bp), in cultured Spodoptera frugiperda 9 cells (Sf9), Bombyx mori cells, and silkworm larvae. In this study, the expression of human type II collagen gene in both insect cells and silkworm larvae was purified by nickel column chromatography, leading to 300-kDa bands in SDS-PAGE and western blotting indicative of collagen α-chains organized in a triple-helical structure. About 1 mg/larva human type II collagen is purified from silkworm skin, which shows a putative large scale of collagen production way. An activity assay of recombinant human type II collagen expressed by silkworm larvae demonstrated that the recombinant protein has considerable bioactive properties. Scanning electron microscopy of purified proteins clearly reveals randomly distributed and pitted structures. We conclude that the baculovirus-silkworm multigene expression system can be used as an efficient platform for express active human type II collagen and other complicated eukaryotic proteins.

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