摘要:
A gene encoding glutamate dehydrogenase is introduced into a coryneform bacterium having L-lysine productivity to increase an intracellular activity of glutamate dehydrogenase, thereby improving the ability to produce L-lysine.
摘要:
DNAs encoding the following proteins (A) or (B) which participate in the temperature sensitivity to surfactants of corynebacteria: (A) a protein having the amino acid sequence represented by SEQ ID NO:2 or a protein having the amino acid sequence represented by SEQ ID NO:2 wherein Leu at the 139-position is substituted by another amino acid residue excluding Pro and having a temperature sensitive DTSR activity; and (B) proteins derived from the above proteins (A) by substitution, deletion, insertion, addition or inversion of one or several amino acid residues except the one at the 139-position in the amino acid sequence represented by SEQ ID NO:2 and having the temperature sensitive DTSR activity.
摘要:
DNAS encoding the following proteins (A) or (B) which participate in the temperature sensitivity to surfactants of corynebacteria: (A) a protein having the amino acid sequence represented by SEQ ID NO:2 or a protein having the amino acid sequence represented by SEQ ID NO:2 wherein Leu at the 139-position is substituted by another amino acid residue excluding Pro and having a temperature sensitive DTSR activity; and (B) proteins derived from the above proteins (A) by substitution, deletion, insertion, addition or inversion of one or several amino acid residues except the one at the 139-position in the amino acid sequence represented by SEQ ID NO:2 and having the temperature sensitive DTSR activity.
摘要翻译:编码参与对棒状杆菌表面活性剂的温度敏感性的以下蛋白质(A)或(B)的DNAS:(A)具有SEQ ID NO:2所示的氨基酸序列的蛋白质或具有SEQ ID NO:2所示的氨基酸序列的蛋白质 SEQ ID NO:2,其中在139位的Leu被除了Pro之外的另一个氨基酸残基取代并且具有温度敏感的DTSR活性; 和(B)衍生自上述蛋白质(A)的蛋白质,除了SEQ ID NO:2所示的氨基酸序列中139位以外的一个或几个氨基酸残基的取代,缺失,插入,添加或倒位 并具有温度敏感的DTSR活性。
摘要:
A coryneform bacterium in which an intracellular activity of 6-phosphofructokinase is increased, and which has L-lysine productivity, and a method for producing L-lysine comprising the steps of cultivating the coryneform bacterium, to produce and accumulate L-lysine in a culture, and collecting L-lysine from the culture, as well as a DNA usable in increasing the 6-phosphofructokinase activity.
摘要:
An object resides in controlling the retaining and dissociation of a gene extrachromosomally for efficient production of an objective substance in a fermentative manner. By culturing and growing a microorganism containing a plasmid carrying a gene disadvantageously functioning for the production of an objective enzyme and a temperature-sensitive replication origin, on which plasmid the functional gene is solely present, at a temperature at which the plasmid is replicable, and continuously culturing the microorganism at a temperature at which the plasmid is never replicable, to dissociate the plasmid from the cells and continue the culturing, the objective substance can efficiently be produced.