摘要:
The invention relates to nucleotide sequences of coryneform bacteria that encode proteins that are involved in the biosynthesis of L-serine and to a method for producing L-serine. According to the invention, at least 79 amino acids at the C terminus of the wild-type serA sequence are deleted, thereby producing a 3-phosphoglycerate dehydrogenase having a reduced feedback inhibition by L-serine vis-à-vis the wild-type sequence.
摘要:
The invention relates to nucleotide sequences of coryneform bacteria that encode proteins that are involved in the biosynthesis of L-serine and to a method for producing L-serine. According to the invention, at least 79 amino acids at the C terminus of the wild-type serA sequence are deleted, thereby producing a 3-phosphoglycerate dehydrogenase having a reduced feedback inhibition by L-serine vis-à-vis the wild-type sequence.
摘要:
This invention relates to the nucleotide sequence of coryneform bacteria coding for proteins which are involved in L-serine metabolism with reduced and switched off L-serine dehydratase activity. The invention also relates to microorganisms used in methods for producing L-serine.
摘要:
A method is disclosed for microbially producing L-amino acids of aspartate and/or glutamate families which comprises the step of: culturing a strain of Escherichia coli that produces said L-amino acids in a medium suitable for the production of an L-amino acid, whereby said Escherichia coli strain is transformed with a gene construct comprising a polynucleotide encoding an enzyme with pyruvate carboxylase activity.
摘要:
The present invention relates to nucleotide sequences of coryneform bacteria, coding for proteins involved in the bio-synthesis of L-serine and to methods for the isolation thereof. The invention further relates to an improved method for the production of L-serine. In addition, the present invention relates to the use of L-serine in the food, animal feed and/or pharmaceutical industries or in human medicine.
摘要:
The folic acid concentration in amino acid producing organisms is reduced or completely removed in order to increase the production of L-serine. The enzymes and genes, which are involved in the biosynthesis of folic acid, can be completely excluded or at least reduced in activity. In a preferred embodiment, SEQ ID NOs: 1-7 are utilized.
摘要翻译:为了增加L-丝氨酸的产生,产生氨基酸的生物体中的叶酸浓度被降低或完全去除。 参与叶酸生物合成的酶和基因可以完全排除或至少降低活性。 在优选的实施方案中,使用SEQ ID NO:1-7。
摘要:
This invention relates to the nucleotide sequence of coryneform bacteria coding for proteins which are involved in L-serine metabolism with reduced and switched off L-serine dehydratase activity. The invention also relates to microorganisms used in methods for producing L-serine.
摘要:
A pyruvate carboxylase gene having SEQ ID NO:1 as well as an amino acid sequence having SEQ ID NO:2 expressed by the pyruvate carboxylate gene are disclosed. Also disclosed is a method for microbial production of amino acids of the aspartate and/or glutamate family in which the pyruvate carboxylase activity is increased by genetically changing the pyruvate carboxylase gene having SEQ ID NO:1 through expression of a microorganism which produces the corresponding amino acid having SEQ ID NO:2.
摘要翻译:公开了具有SEQ ID NO:1的丙酮酸羧化酶基因以及由丙酮酸羧酸酯基因表达的具有SEQ ID NO:2的氨基酸序列。 还公开了一种微生物生产天冬氨酸和/或谷氨酸家族的氨基酸的方法,其中丙酮酸羧化酶活性通过遗传改变具有SEQ ID NO:1的丙酮酸羧化酶基因而增加,通过表达产生相应氨基的微生物 具有SEQ ID NO:2的酸。
摘要:
The invention relates to the nucleotide sequences of coryneform bacteria coding for proteins which are involved in L-serine metabolism with reduced and switched off L-serine dehydratase. Said invention also relates to micro-organisms and to methods for producing L-serine.