摘要:
A method of amplifying a desired gene in a chromosome of a coryneform bacterium, which comprises forming an artificial transposon in which a drug resistance gene and the desired gene are inserted into an insertion sequence of the coryneform bacterium, and introducing said artificial transposon into the coryneform bacterium. In accordance with the method of the present invention, a desired gene can be amplified in a chromosome in coryneform bacteria which are used in the industrial production of amino acids or nucleic acids.
摘要:
A coryneform bacterium in which a DNA coding for a diaminopimelate decarboxylase and a DNA coding for a diaminopimelate dehydrogenase are enhanced is cultivated in a medium to allow L-lysine to be produced and accumulated in a culture, and L-lysine is collected from the culture.
摘要:
The ability and speed with which a coryneform bacterium can produce L-lysine are improved when the coryneform bacterium contains an aspartokinase in which feedback inhibition by L-lysine and L-threonine is substantially desensitized. This is accomplished by successively enhancing the DNA coding for dihydrodipicolinate reductase, the DNA coding for dihydrodipicolinate synthase, the DNA coding for diaminopimelate decarboxylase, and the DNA coding for diaminopimelate dehydrogenase.
摘要:
The L-lysine-producing ability and the L-lysine-producing speed are improved in a coryneform bacterium harboring an aspartokinase in which feedback inhibition by L-lysine and L-threonine is substantially desensitized, by successively enhancing DNA coding for a dihydrodipicolinate reductase, DNA coding for a dihydrodipicolinate synthase, DNA coding for a diaminopimelate decarboxylase, and DNA coding for a diaminopimelate dehydrogenase.
摘要:
A gene encoding a protein constituting sucrose PTS of coryneform bacterium is provided by amplifying a region existing downstream from sucrase gene in coryneform bacterium by the cassette-ligation mediated PCR to obtain DNA encoding sucrose PTS enzyme II, which is a protein defined in the following (A) or (B): (A) a protein which has the amino acid sequence of SEQ ID NO: 2 in Sequence Listing; (B) a protein which has the amino acid sequence of SEQ ID NO: 2 in Sequence Listing including substitution, deletion, insertion, addition or inversion of one or several amino acids, and an activity for binding to sucrose.
摘要翻译:通过盒式连接介导的PCR扩增棒状杆菌型细菌的蔗糖酶基因下游的区域,得到编码构成棒状细菌的蔗糖PTS的蛋白质的基因,得到编码下述定义的蛋白质的蔗糖PTS酶II的DNA( A)或(B):(A)序列表中具有SEQ ID NO:2的氨基酸序列的蛋白质; (B)序列表中具有SEQ ID NO:2的氨基酸序列的蛋白质,包括一个或几个氨基酸的取代,缺失,插入,添加或转化,以及与蔗糖结合的活性。
摘要:
A microorganism, which has an ability to produce L-amino acid, especially L-phenylalanine, L-tryptophane, L-tyrosine, L-threonine, or L-isoleucine, in which a phosphoenolpyruvate-producing ability is enhanced, is cultivated in a medium so that the L-amino acid is produced and accumulated in the medium to collect the L-amino acid.