{"id":49506,"date":"2018-01-24T07:26:03","date_gmt":"2018-01-24T06:26:03","guid":{"rendered":"https:\/\/renewable-carbon.eu\/news\/?p=49506"},"modified":"2018-01-23T13:30:25","modified_gmt":"2018-01-23T12:30:25","slug":"genetically-engineered-spider-silk","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/genetically-engineered-spider-silk\/","title":{"rendered":"Genetically engineered spider silk"},"content":{"rendered":"

Whereas the two companies discussed in this series so far use fermentation technology to imitate silk, the American company Kraig Biocraft Laboratories<\/a> uses the old workhorse, the silkworm. They introduced spider genes into the silkworm in order to arrive at products much like spider silk, stronger than common silk. They claim their genetically engineered spider silk to have superior properties, for instance for bulletproof vests, and for the environment. They managed to secure a $ 1 million contract from the US Army that allows them to prove they\u2019re right.<\/strong><\/p>\n

\"Silk-worms-300x225\"
Silk worms. Photo: Kraig Labs.<\/figcaption><\/figure>\n

The comparative advantages of genetically engineered spider silk<\/h3>\n

\u2018When Kraig Labs first launched its research and development efforts to produce spider silk,\u2019 the company writes on its website, \u2018very few people believed that those efforts could be successful.\u00a0Many even doubted that there would be a market for the product once it was developed.\u2019 But here they are, and they do very well. They\u2019re confident that their product is the most cost-effective one on the market, based on two factors. First, with their silkworms they can tap directly into an established industry. \u2018Silkworms,\u2019 so they write, \u2018have a proven industrial scale production record, producing approximately $ 5 billion worth of normal raw silk per year. \u00b1Our technology simply harnesses that production capacity by introducing a genetically engineered silkworm that produces a genetically engineered spider silk instead of common silk.\u2019 The second factor is that their competitors, after a fermentation processes on the basis of modified yeasts or bacteria, still have to purify the fibroin. And after purification, this has to be \u2018wet-spun\u2019 to produce usable fibres. Wet-spinning, says Kraig Labs, is a process that often requires the use of chemicals like dimethyl sulfoxide, or DMSO, which has to be handled with great care. In nature, the silkworm itself takes care of these processes.<\/p>\n

So Kraig Labs says: \u2018We let nature do the work for us. Our genetically engineered silkworms are raised using the tried and true methods used by silk farmers for millennia.\u00a0Our production process is as simple as growing and feeding white mulberry leaves to our proprietary silkworms and harvesting recombinant spider silk directly from the cocoons.\u2019 They claim that on this basis, they can produce their genetically engineered spider silk for less than $ 300 per kilogram. Moreover, this process lends environmental advantages to them as well. The ultimate resource of the company\u2019s silk are the mulberry trees on which the silkworms feed; they require little maintenance and help in reducing soil erosion.<\/p>\n

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Eventually, the silkworm will become a silk moth. Photo: Kraig Labs.<\/figcaption><\/figure>\n

Genetically engineered spider silk holds great promise<\/h3>\n

Spider silk is much stronger than common silk. Kraig Labs develop and produce, as they say, \u2018new fibres that have never been seen before with extraordinary properties of strength and flexibility\u2026. Because of its strength, resilience and flexibility, spider silk holds great promise for commercial and consumer applications. While the superior properties of spider silks are well known, there was no known way to produce spider silk in commercial quantities. Since spiders are cannibalistic, they cannot be raised in concentrated colonies to produce silk. The production of spider silk in commercial quantities holds the potential of a life-saving ballistic resistant material, which is lighter, thinner, more flexible, and tougher than steel. Other applications of spider silk include use as structural material and for any application in which light weight and high strength are required.\u2019<\/p>\n

Kraig Labs commercialized the knowledge on genetically engineered silkworms, developed at the University of Wyoming<\/a>, in research to which also University of Notre Dame<\/a> in Indiana and Zhejiang University<\/a> in China contributed. \u2018Silk fibre holds great potential as biomaterials for wound dressings, artificial ligaments, tendons, tissue scaffolds, microcapsules and other applications, and this research takes us closer to reaching that potential,\u2019 said professor Don Jarvis, molecular biology professor at UW in 2012. \u2018It\u2019s clear that the silkworm is a uniquely qualified platform for this particular biotechnological application.\u2019<\/p>\n

High-performance fibre<\/h3>\n

Kraig envisions genetically engineered spider silk, with its superior mechanical characteristics, to surpass the current generation of high-performance fibre. They believe that spider silk is in some ways so superior to the materials currently available in the marketplace, that an expansion of demand and market opportunities will follow spider silk\u2019s commercial introduction. According to them, genetically engineered spider silk is far superior to steel for bullet proof vests in material toughness, tensile strength and weight, and even much better than Kevlar\u00ae<\/sup> in toughness.<\/p>\n

The company now produces many kinds of genetically engineered spider silk. These will enter into many markets, like medical textiles, safe and protective clothing, composites with textile structures, sportswear and apparel. Some of their varieties will be able to compete on the traditional silk market. The company\u2019s next-generation product will be an essentially pure spider silk. This material holds the potential to make significant inroads into the technical textiles market, they say. And then, their \u2018Gen 3 technical and medical fibre\u2019, is designed to move beyond the physical, mechanical and chemical properties of natural spider silk. Gen 3 fibres are in a relatively early stage of development and will incorporate such elements as antibacterial agents for medical use, and metallic ions for use in industrial processes.<\/p>\n

Kraig Biocraft Laboratories, Inc., as they say, is a fully reporting biotechnology company, the leading developer of genetically engineered spider silk based fibre technologies. The company has achieved a series of scientific breakthroughs in the area of spider silk technology with implications for the global textile industry. We will continue to hear from them.<\/p>\n

 <\/p>\n

This is the third in a series on artificial silk. The articles were published on 16 December<\/a> and 28 December 2017<\/a>, and 4 January 2018<\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Whereas the two companies discussed in this series so far use fermentation technology to imitate silk, the American company Kraig Biocraft Laboratories uses the old workhorse, the silkworm. They introduced spider genes into the silkworm in order to arrive at products much like spider silk, stronger than common silk. They claim their genetically engineered spider […]<\/p>\n","protected":false},"author":59,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","nova_meta_subtitle":"","footnotes":""},"categories":[5572],"tags":[5796,13831],"supplier":[5606,14139,3075,13963],"class_list":["post-49506","post","type-post","status-publish","format-standard","hentry","category-bio-based","tag-biotechnology","tag-spidersilk","supplier-kraig-biocraft-laboratories-inc","supplier-university-of-notre-dame","supplier-university-of-wyoming-laramie","supplier-zhejiang-university"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/49506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/59"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=49506"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/49506\/revisions"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=49506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=49506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=49506"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=49506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}