| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Research Abstract |
Hornet silks, fibrous proteins present in the cocoon produced by the larvae of vespa species, are composed of four major proteins. Complete amino acid sequences of the four major proteins(Vssilk 1-4) in the hornet silk produced by the yellow hornet(Vespa simillima, Vespinae, Vespidae) have been determined. The amino acid sequences in Vssilk 1-4 are highly divergent, but the four proteins have some common properties. The most attractive feature of these proteins is that they have anα-helix region, which includes coiled-coilα-helices, and aβ-sheet region. The aforementioned coiled-coil andβ-sheet structures are responsible for the intermolecular binding between the Vssilk 1-4 proteins that make up the composite structure in hornet silk. This coiled-coil structure is restored when hornet silk gel films are formed by pressing and drying hornet silk hydrogel.
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