摘要:
The present invention relates to a method for increasing genetic recombination frequency in a genomic DNA and a method for inducing genome rearrangement. Specifically, according to the present invention there are provided: the method for increasing genetic recombination frequency in a cell in which genetic recombination takes place at any sites in the genome, comprising causing a restriction enzyme to be expressed in the cell, inducing transient activation of the restriction enzyme, and then introducing 2 or more double strand cleavages into any genomic DNA of the cell, so as to increase the genetic recombination frequency; the method for inducing genome rearrangement through the use of the above method; and cells each prepared through the use of the above 2 methods.
摘要:
The present invention provides compositions, including vectors, and methods for the rapid subcloning of nucleic acid sequences in vivo and in vitro. In particular, the invention provides vectors used to contain a gene of interest that comprise a sequence-specific recombinase target site. These vectors are used to rapidly transfer the gene or genes of interest into any vector that contains a sequence-specific recombinase target site located downstream of a regulatory element so that the gene of interest may be regulated.
摘要:
This invention relates to recombinant-DNA-technology. Specifically this invention relates to new recombinant yeast strains transformed with xylose reductase and/or xylitol dehydrogenase enzyme genes. A yeast strain transformed with the xylose reductase gene is capable of reducing xylose to xylitol and consequently of producing xylitol in vivo. If both of these genes are transformed into a yeast strain, the resultant strain is capable of producing ethanol on xylose containing medium during fermentation. Further, the said new yeast strains are capable of expressing the said two enzymes. Xylose reductase produced by these strains can be used in an enzymatic process for the production of xylitol in vitro.
摘要:
An expression system which provides heterologous proteins expressed by a non-native host organism but which have native-protein-like biological activity and/or structure. Disclosed are vectors, expression hosts and methods for expressing the heterologous proteins. The expression system involves co-expression of protein factor(s) which is/are capable of catalyzing disulphide bond formation and desired heterologous protein(s). The expression system is presented using yeast cells as the preferred host, protein disulphide isomerase (PDI) and thioredoxin (TRX) as the preferred examples of the protein factors and HCV-E2715 envelope glycoprotein and human FIGF as the preferred examples of the heterologous proteins.
摘要:
An object of the present invention is to provide a vector which can be integrated into a yeast chromosome in a high number of copies. Another object of the present invention is to provide a modified vector which can be integrated into the yeast chromosome in a high number of copies and of which expression units stably maintain on the chromosome. The vector according to the present invention comprises a marker gene for selecting transformants, a shortened promoter sequence which is operably linked to the marker gene and a sequence homologous to the chromosomal DNA of Candida utilis, and optionally a heterologous gene or a gene derived from C. utilis, wherein the vector is linearized by cleaving within said homologous DNA sequence or at both ends of the homologous DNA sequence with restriction enzymes, and wherein the heterologous gene or the gene derived from C. utilis can be integrated into the chromosomal DNA of C. utilis by homologous recombination.
摘要:
An object of the present invention is to provide a vector which can be integrated into a yeast chromosome in a high number of copies. Another object of the present invention is to provide a modified vector which can be integrated into the yeast chromosome in a high number of copies and of which expression units stably maintain on the chromosome. The vector according to the present invention comprises a marker gene for selecting transformants, a shortened promoter sequence which is operably linked to the marker gene and a sequence homologous to the chromosomal DNA of Candida utilis, and optionally a heterologous gene or a gene derived from C. utilis, wherein the vector is linearized by cleaving within said homologous DNA sequence or at both ends of the homologous DNA sequence with restriction enzymes, and wherein the heterologous gene or the gene derived from C. utilis can be integrated into the chromosomal DNA of C. utilis by homologous recombination.
摘要:
A method for transforming Schizosaccharomyces pombe which comprises integrating a vector into a chromosome of Schizosaccharomyces pombe through homologous recombination, wherein the vector has an expression cassette containing a heterologous protein structural gene and a promoter and a gene segment which induces homologous recombination of the chromosome and has lost a replication origin which functions in cells of an organism other than Schizosaccharomyces pombe required for construction of the vector.
摘要:
The present disclosure provides retrotransposons and retrotransposon derivatives and methods for their uses. Specifically, the present invention provides Ty5-6p and derivatives. Ty5-6p and its derivatives integrate preferentially in the genome of eukaryotes in silent chromatin and in regions like silent chromatin. Ty5-6p insertions can be used to regulate the life span of cells, to genetically mark cells, to deliver gene therapy and to identify genes involved in development and in senescence.
摘要:
A gene editing system of Candida viswanathii includes a Candida viswanathii, a first gene editing fragment and a second gene editing fragment. The first gene editing fragment successively includes a first homology arm and a screening gene. The second gene editing fragment is connected to a C-terminus of the first gene editing fragment and includes a second homology arm, a Cas9 expression cassette and a sgRNA cassette. The Cas9 expression cassette successively includes a Cas9 promoter, a Cas9 gene and three nuclear localization sequences. The sgRNA cassette successively includes a sgRNA promoter, a first ribozyme, a targeting sequence, a scaffold and a second ribozyme. The first gene editing fragment and the second gene editing fragment are constructed as a linear fragment for gene editing of a chromosome of the Candida viswanathii.