摘要:
An Escherichia coli mutant strain deficient in dihydrodipicolinate synthase or dihydrodipicolinate reductase is transformed with a chromosomal gene library of Bacillus methanolicus, and a transformant strain which can grow on a minimal medium is selected. Recombinant DNA which codes for dihydrodipicolinate synthase or dihydrodipicolinate reductase (named dapB) is obtained from the transformant.
摘要:
An Escherichia coil mutant strain deficient in dihydrodipicolinate synthase or dihydrodipicolinate reductase is transformed by using a chromosome gene library of Bacillus methanolicus, a transformant strain which can grow on a minimal medium is selected, and recombinant DNA containing DNA which codes for dihydrodipicolinate synthase or dihydrodipicolinate reductase is obtained from the transformant.
摘要:
An Escherichia coli mutant strain deficient in dihydrodipicolinate synthase or dihydrodipicolinate reductase is transformed with a chromosomal gene library of Bacillus methanolicus, and a transformant strain which can grow on a minimal medium is selected. Recombinant DNA which codes for dihydrodipicolinate synthase or dihydrodipicolinate reductase is obtained from the transformant.
摘要:
The present invention provides dihydropicolinate synthase and dihydrodipicolinate reductase enzymes from Bacillus methanolicus, polynucleotides encoding the enzymes, and methods of producing L-lysinse in microorganisms expressing the enzymes.
摘要:
A methane-utilizing microorganism capable of producing L-amino acid, for example, bacteria belonging to type I, type X or type II in the taxonomic categorization methane-utilizing bacteria such as Methylomonas albus, Methylococcus capsulatus and Methylosinus trichosporium, is cultivated in a culture medium in contact with gas containing methane which is the main source of carbon, to allow the L-amino acid to be produced and accumulated in the medium, and the L-amino acid is collected from the medium.
摘要:
A novel insertion sequence, which has been found in the sMMO gene coding for methane monooxygenase of methane-assimilating bacterium Methylococcus capsulatus NCIMB 11132 strain, and has inverted repeat sequences consisting of a sequence of the nucleotide numbers 5-19 of SEQ ID NO: 1 at the both ends, can be utilized as effective means for genetic analysis including creation of insertion mutant strains, gene mapping, promoter searching, insertion of genetic information into chromosomal DNA, disruption of specific gene and the like, or utilized for improving methane-assimilating bacteria by chromosomal genetic engineering techniques.
摘要翻译:已经在编码甲烷同化细菌甲壳螨NCIMB 11132株的甲烷单加氧酶的sMMO基因中发现了新的插入序列,并且具有由SEQ ID NO:1的核苷酸编号5-19的序列组成的反向重复序列 在两端都可以用作遗传分析的有效手段,包括插入突变菌株的创建,基因作图,启动子搜索,遗传信息插入染色体DNA,破坏特定基因等,或用于改善甲烷同化 细菌通过染色体遗传工程技术。
摘要:
Disclosed are coryneform L-glutamic acid-producing bacteria deficient in .alpha.-ketoglutarate dehydrogenase, a method of producing L-glutamic acid by using the bacteria, a gene coding for an enzyme having .alpha.-KGDH activity originating from coryneform L-glutamic acid-producing bacteria, recombinant DNA containing the gene, coryneform bacteria harboring the recombinant DNA, and a method of producing L-lysine by using bacteria harboring the recombinant DNA and having L-lysine productivity.
摘要:
A plurality of primer sets are designed based on a region where conservation at the amino acid level is observed among various microorganisms for known gene sequences corresponding to a gene coding for an enzyme of the L-amino acid biosynthetic pathway derived from Corynebacterium thermoaminogenes, preferably an enzyme that functions at a higher temperature compared with that of Corynebacterium glutamicum. PCR is performed by using the primers and chromosomal DNA of Corynebacterium thermoaminogenes as a template. The primers with which an amplification fragment has been obtained are used as primers for screening to select a clone containing a target DNA fragment from a plasmid library of chromosomal DNA of Corynebacterium thermoaminogenes.
摘要:
A plurality of primer sets are designed based on a region where conservation at the amino acid level is observed among various microorganisms for known gene sequences corresponding to a gene coding for an enzyme of the L-amino acid biosynthetic pathway derived from Corynebacterium thermoaminogenes, preferably an enzyme that functions at a higher temperature compared with that of Corynebacterium glutamicum. PCR is performed by using the primers and chromosomal DNA of Corynebacterium thermoaminogenes as a template. The primers with which an amplification fragment has been obtained are used as primers for screening to select a clone containing a target DNA fragment from a plasmid library of chromosomal DNA of Corynebacterium thermoaminogenes.
摘要:
A plurality of primer sets are designed based on a region where conservation at the amino acid level is observed among various microorganisms for known gene sequences corresponding to a gene coding for an enzyme of the L-amino acid biosynthetic pathway derived from Corynebacterium thermoaminogenes, preferably an enzyme that functions at a higher temperature compared with that of Corynebacterium glutamicum. PCR is performed by using the primers and chromosomal DNA of Corynebacterium thermoaminogenes as a template. The primers with which an amplification fragment has been obtained are used as primers for screening to select a clone containing a target DNA fragment from a plasmid library of chromosomal DNA of Corynebacterium thermoaminogenes.