摘要:
An isolated polynucleotide comprising a polynucleotide sequence selected from the group consisting of a) polynucleotide which is at least 70% identical to a polynucleotide that codes for a polypeptide which comprises the amino acid sequence of SEQ ID No. 2, b) polynucleotide which codes for a polypeptide that comprises an amino acid sequence which is at least 70% identical to the amino acid sequence of SEQ ID No. 2, c) polynucleotide which is complementary to the polynucleotides of a) or b), and d) polynucleotide comprising at least 15 successive nucleotides of the polynucleotide sequence of a), b) or c), and processes for the fermentative preparation of L-amino acids using coryneform bacteria in which at least the metE gene is present in enhanced form, and the use of the polynucleotide sequences as hybridization probes.
摘要翻译:一种分离的多核苷酸,其包含选自以下的多核苷酸序列:a)与编码包含SEQ ID No.2的氨基酸序列的多肽的多核苷酸至少70%相同的多核苷酸,b)编码 包含与SEQ ID No.2的氨基酸序列至少70%相同的氨基酸序列的多肽,c)与a)或b)的多核苷酸互补的多核苷酸,以及d)至少包含至少 a),b)或c)的多核苷酸序列的15个连续核苷酸,以及使用棒状细菌发酵制备L-氨基酸的方法,其中至少metE基因以增强形式存在,以及使用多核苷酸 序列作为杂交探针。
摘要:
A method of locating insertion elements (IS elements) or transposons in coryneform bacteria, a positive selection system suitable for the above, the IS elements found in this manner and their use, is disclosed. The method involves:(1) The construction of a non-self-transferrable vector mobilizable from an E. coli mobilizer strain which vector is composed of(a) A DNA segment containing a replicon functional in E. coli,(b) A second DNA segment containing the DNA fragment coding for the mobilization function (Mob site containing the oriT),(c) A third DNA segment which recombines homologously in Gram-positive bacteria and/or contains a replicon functional in coryneform bacteria,(d) A DNA segment from Bacillus subtilis containing the sacB gene,(2) Transfer of this vector by means of conjugative transfer into the coryneform recipient strains,(3) Cultivation of the transconjugants containing the vector in an .about.10% sucrose-containing nutrient medium,(4) Lysis of the sucrose-resistant clones, cleaving of the plasmids with restriction endonucleases and analysis of the fragments.
摘要:
An isolated polynucleotide comprising a polynucleotide sequence selected from the group consisting of a) polynucleotide which is at least 70% identical to a polynucleotide that codes for a polypeptide which comprises the amino acid sequence of SEQ ID No. 2, b) polynucleotide which codes for a polypeptide that comprises an amino acid sequence which is at least 70% identical to the amino acid sequence of SEQ ID No. 2, c) polynucleotide which is complementary to the polynucleotides of a) or b), and d) polynucleotide comprising at least 15 successive nucleotides of the polynucleotide sequence of a), b) or c), and processes for the fermentative preparation of L-amino acids using coryneform bacteria in which at least the metH gene is present in enhanced form, and use of the polynucleotide sequences as hybridization probes.
摘要翻译:一种分离的多核苷酸,其包含选自以下的多核苷酸序列:a)与编码包含SEQ ID No.2的氨基酸序列的多肽的多核苷酸至少70%相同的多核苷酸,b)编码 包含与SEQ ID No.2的氨基酸序列至少70%相同的氨基酸序列的多肽,c)与a)或b)的多核苷酸互补的多核苷酸,以及d)至少包含至少 a),b)或c)的多核苷酸序列的15个连续核苷酸,以及使用棒状细菌发酵制备L-氨基酸的方法,其中至少metH基因以增强形式存在,以及使用多核苷酸序列 作为杂交探针。
摘要:
An isolated polynucleotide comprising a polynucleotide sequence selected from the group consisting of a) polynucleotide which is at least 70% identical to a polynucleotide that codes for a polypeptide which comprises the amino acid sequence of SEQ ID No. 2, b) polynucleotide which codes for a polypeptide that comprises an amino acid sequence which is at least 70% identical to the amino acid sequence of SEQ ID No. 2, c) polynucleotide which is complementary to the polynucleotides of a) or b), and d) polynucleotide comprising at least 15 successive nucleotides of the polynucleotide sequence of a), b) or c), and processes for the fermentative preparation of L-amino acids using coryneform bacteria in which at least the metH gene is present in enhanced form, and use of the polynucleotide sequences as hybridization probes.
摘要:
An isolated polynucleotide comprising a polynucleotide sequence selected from the group consisting of a) polynucleotide which is at least 70% identical to a polynucleotide that codes for a polypeptide which comprises the amino acid sequence of SEQ ID. No. 2, b) polynucleotide which codes for a polypeptide that comprises an amino acid sequence which is at least 70% identical to the amino acid sequence of SEQ ID No. 2, c) polynucleotide which is complementary to the polynucleotides of a) or b), and p1 d) polynucleotide comprising at least 15 successive nucleotides of the polynucleotide sequence of a), b) or c), and processes for the fermentative preparation of L-amino acids using coryneform bacteria in which at least the metE gene is present in enhanced form, and the use of the polynucleotide sequences as hybridization probes.
摘要翻译:一种分离的多核苷酸,其包含选自以下的多核苷酸序列:a)与编码包含SEQ ID NO:1的氨基酸序列的多肽的多核苷酸至少70%相同的多核苷酸。 b)编码包含与SEQ ID No.2的氨基酸序列至少70%相同的氨基酸序列的多肽的多核苷酸,c)与a)或 b)和p1 d)包含a),b)或c)的多核苷酸序列的至少15个连续核苷酸的多核苷酸,以及使用棒状细菌发酵制备L-氨基酸的方法,其中至少metE基因是 以增强形式存在,以及使用多核苷酸序列作为杂交探针。
摘要:
The present invention relates to isolated polynucleotides which encode proteins with O-acetylhomoserine sulfhydrylase, vectors and cells containing the polynucleotides as well as methods of preparing L-amino acids.
摘要:
The invention relates to polynucleotides comprising polynucleotide sequences corresponding to the metD gene and parts thereof that encode polypeptide sequences and parts thereof possessing varying degrees of MetD transcription regulator activity, methods for preparation of L-amino acids, and methods of screening and amplifying polynucleotides encoding polypeptide sequences which comprise varying degrees of MetD transcription regulator activity. Further, the invention relates to animal food additives based on fermentation liquor and containing L-methionine, and to the preparation of such additive.
摘要:
The present invention relates to isolated polynucleotides from Corynebacterium glutamicum encoding proteins of the transcription activator (MetR) and O-succinylhomoserine sulfhydrylase (MetZ). The invention also relates to producing L-amino acids, particularly methionine, in coryneform cells having attenuated metR and metZ genes.
摘要:
The present invention relates to isolated polynucleotides which encode proteins with O-acetylhomoserine sulfhydrylase, vectors and cells containing the polynucleotides as well as methods of preparing L-amino acids.
摘要:
A method locating insertion elements (IS elements) or transposons in coryneform bacteria, a positive selection system suitable for the above, the IS elements found in this manner and their use, is disclosed. The method involves:(1) The construction of a non-self-transferrable vector mobilizable from an E. coli mobilizer strain which vector is composed of(a) A DNA segment containing a replicon functional in E. coli,(b) A second DNA segment containing the DNA fragment coding for the mobilization function (Mob site containing the oriT),(c) A third DNA segment which recombines homologously in Gram-positive bacteria and/or contains a replicon functional in coryneform bacteria,(d) A DNA segment from Bacillus subtilis containing the sacB gens,(2) Transfer of this vector by means of conjugative transfer into the coryneform recipient strains,(3) Cultivation of the transconjugants containing the vector in an .about.10% sucrose-containing nutrient medium,(4) Lysis of the sucrose-resistant clones, cleaving of the plasmids with restriction endonucleases and analysis of the fragments.