Abstract:
The present invention provides a method for producing a peptide, comprising culturing a transformant introduced with an expression vector to prepare a culture, and mixing the culture with a carboxy component and an amine component to form the peptide. The expression vector comprises a polynucleotide encoding a protein: (A) having selected deletions in the amino acid sequence of SEQ ID NO:2, (B) having a mutation of one or several amino acid residues in any protein selected from said group (A); (C) having 70% or more amino acid sequence identity to any protein selected from said group (A), (D) encoded by a polynucleotide that hybridizes under a stringent condition with a polynucleotide consisting of a nucleotide sequence complementary to a polynucleotide encoding any protein selected from said group (A), and (E) encoded by a polynucleotide having 70% or more nucleotide sequence identity to the polynucleotide encoding any protein selected from the group (A).
Abstract translation:本发明提供一种生产肽的方法,包括培养引入了表达载体的转化体以制备培养物,并将培养物与羧基组分和胺组分混合以形成肽。 表达载体包含编码蛋白质的多核苷酸:(A)在SEQ ID NO:2的氨基酸序列中具有选择性缺失的蛋白质,(B)在选自所述组(A)的任何蛋白质中具有一个或几个氨基酸残基的突变 ); (C)与选自由在严格条件下杂交的多核苷酸编码的所述组(A),(D)中选择的任何蛋白质具有70%或更多氨基酸序列同一性的多核苷酸,所述多核苷酸由与编码任何 (A)中选择的蛋白质的蛋白质和(E)编码的多核苷酸,所述多核苷酸与编码选自(A)组的任何蛋白质的多核苷酸具有70%以上的核苷酸序列同一性。
Abstract:
A method of producing an α-L-aspartyl-L-phenylalanine-β-ester by forming the α-L-aspartyl-L-phenylalanine-β-ester from L-aspartic acid-αβ-diester and L-phenylalanine using an enzyme or enzyme-containing substance that has an ability to selectively link L-phenylalanine to an α-ester site of the L-aspartic acid-αβ-diester through a peptide bond.