The present invention aims at providing an excellent peptide-synthesizing protein and a method for efficiently producing a peptide. The peptide is synthesized by reacting an amine component and a carboxy component in the presence of at least one of proteins shown in the following (I) and (II). (I) The mutant protein having an amino acid sequence comprising one or more mutations from any of the mutations 1 to 68, and the mutations 239 to 290 and 324 to 377 in an amino acid sequence of SEQ ID NO:2. (II) The mutant protein having an amino acid sequence comprising one or more mutations from any of the mutations L1 to L335 and M1 to M642 in an amino acid sequence of SEQ ID NO:208
本发明旨在提供一种优秀的肽合成蛋白质及高效生产肽的方法。在以下(I)和(II)所示的蛋白质的至少一种存在下,通过在胺组分和羧组分存在下反应合成肽。其中,(I)为突变蛋白质,其
氨基酸序列包括来自于突变1至突变68、突变239至突变290和突变324至突变377的一个或多个突变;(II)为突变蛋白质,其
氨基酸序列包括来自于L1至L335和M1至M642的一个或多个突变。