摘要:
Transgenic silkworms comprising at least one nucleic acid encoding a chimeric silk polypeptide comprising one or more spider silk elasticity and strength motifs are disclosed. Expression cassettes comprising nucleic acids encoding a variety of chimeric spider silk polypeptides (Spider 2, Spider 4, Spider 6, Spider 8) are also disclosed. A piggyBac vector system is used to incorporate nucleic acids encoding chimeric spider silk polypeptides into the mutant silkworms to generate stable transgenic silkworms. Chimeric silk fibers having improved tensile strength and elasticity characteristics compared to native silkworm silk fibers are also provided. The transgenic silkworms greatly facilitate the commercial production of chimeric silk fibers suitable for use in a wide variety of medical and industrial applications.
摘要:
This invention provides for a process of rapidly forming silk fibroin gelation through ultrasonication. Under the appropriate conditions, gelation can be controlled to occur within two hours after the ultrasonication treatment. Biological materials, including viable cells, or therapeutic agents can be encapsulated in the hydrogels formed from the process and be used as delivery vehicles.
摘要:
To provide a new natural fiber material with excellent physical properties. Any one of the following nucleic acids (a) to (d): (a) a nucleic acid having a base sequence of SEQ ID NO: 1 or 19; (b) a nucleic acid encoding a protein having an amino acid sequence of SEQ ID NO: 2 or 20; (c) a nucleic acid encoding a dragline protein and having a sequence identity of 90% or more with the nucleic acid (a); (d) a nucleic acid which encodes a dragline protein and hybridizes with a complementary chain of the nucleic acid (a) under stringent conditions.
摘要翻译:提供具有优异物理性能的新型天然纤维材料。 以下核酸(a)至(d)中的任一种:(a)具有SEQ ID NO:1或19的碱基序列的核酸; (b)编码具有SEQ ID NO:2或20的氨基酸序列的蛋白质的核酸; (c)与核酸(a)具有90%或更高的序列同一性的编码牵引蛋白的核酸; (d)编码牵引蛋白并在严格条件下与核酸(a)的互补链杂交的核酸。
摘要:
The present invention provides for silk fibroin-based compositions comprising one or more antibiotic agents for prevention or treatment of microbial contamination, methods of making antibiotic-containing silk scaffold, methods of stabilizing antibiotics in silk scaffolds, and methods for preventing or treating microbial contamination using the antibiotic-containing compositions. Various methods may be used to embed the antibiotic(s) into the silk fibroin-based compositions. The antibiotic-containing compositions of the invention are particular useful for stabilizing antibiotics, preventing bacterial infections, and for medical implants, tissue engineering, drug delivery systems, or other pharmaceutical or medical applications.
摘要:
Apparatus and method for the extraction of material from glands of arthropods. The apparatus includes a container in which at least part of the glands are placed and a buffer solution at least partially immersing the glands. Gland material is collected in the material collection area of the container, e.g., by release of the material from the glands into the buffer solution and sedimentation of the material at the bottom of the container. The method involves removing from a body of the arthropod the gland containing at least partially the material, making an opening in an epithelium of the gland, and placing the gland in the container at least partially immersed in a buffer solution, so that the material exits the glands and sediments in the material collection area of the container.
摘要:
The present inventors produced transgenic silkworms which comprise a promoter of a DNA encoding a protein specifically expressed in the silk gland and a DNA encoding a recombinant antibody whose expression is regulated directly or indirectly by the promoter, and which secrete the recombinant antibody into the silk gland. The recombinant antibodies produced from the silk gland of the transgenic silkworms were confirmed to be active.
摘要:
A multi-block copolymer comprises at least one hydrophilic collagen-like block and at least one silk-like block. The silk-like block comprises an amino acid sequence ((GA)mGX)n (SEQ ID NO: 10), wherein G is glycine, A is alanine, m and n are at least 2. X is an ionizable amino acid. The ionizable amino acid can be inducedle to bear a positive charge or a negative charge. The ionizable amino acid bearing the positive charge is preferably histidine and the one bearing the negative charge is preferably glutamic acid.
摘要翻译:多嵌段共聚物包含至少一种亲水性胶原样嵌段和至少一种丝状嵌段。 丝状块包含氨基酸序列((GA)mGX)n(SEQ ID NO:10),其中G是甘氨酸,A是丙氨酸,m和n至少为2.X是可电离的氨基酸。 可电离的氨基酸可以被诱导携带正电荷或负电荷。 带有正电荷的可电离氨基酸优选为组氨酸,带负电荷的氨基酸优选为谷氨酸。
摘要:
One aspect of the present invention relates to a method of preparing a fibrous protein smectic hydrogel by way of a solvent templating process, comprising the steps of pouring an aqueous fibrous protein solution into a container comprising a solvent that is not miscible with water; sealing the container and allowing it to age at about room temperature; and collecting the resulting fibrous protein smectic hydrogel and allowing it to dry. Another aspect of the present invention relates to a method of obtaining predominantly one enantiomer from a racemic mixture, comprising the steps of pouring an aqueous fibrous protein solution into a container comprising a solvent that is not miscible with water; sealing the container and allowing it to age at about room temperature; allowing the enantiomers of racemic mixture to diffuse selectively into the smectic hydrogel in solution; removing the smectic hydrogel from the solution; rinsing predominantly one enantiomer from the surface of the smectic hydrogel; and extracting predominantly one enantiomer from the interior of the smectic hydrogel. The present invention also relates to a smectic hydrogel prepared according to an aforementioned method.
摘要:
Biomolecular conjugates are provided which comprise the conjugation product of a repeat sequence protein polymer and at least one active agent. Additional aspects provide methods for their manufacture and various industrial and consumer applications.
摘要:
The present invention provides for concentrated aqueous silk fibroin solutions and an all-aqueous mode for preparation of concentrated aqueous fibroin solutions that avoids the use of organic solvents, direct additives, or harsh chemicals. The invention further provides for the use of these solutions in production of materials, e.g., fibers, films, foams, meshes, scaffolds and hydrogels.