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    • 6. 发明专利
    • Aminopeptidase
    • 氨肽酶
    • JP2011177189A
    • 2011-09-15
    • JP2011094093
    • 2011-04-20
    • Genentech Incジェネンテック, インコーポレイテッド
    • JOLY JOHN C
    • C12N15/09C12N1/21C12N9/48C12N9/52C12N9/54C12P21/02C12R1/19
    • C12R1/19C12N9/48C12N9/52C12P21/02
    • PROBLEM TO BE SOLVED: To provide a gram-negative bacterial cell which is deficient in a chromosomal gene present in a wild-type such cell which gene shares at least 80% sequence identity with the native sequence of the yfcK gene and encodes an aminopeptidase. SOLUTION: The gram-negative bacterial cell is deficient in a chromosomal gene present in a wild-type such cell which gene shares at least 80% sequence identity with the native sequence of aminopeptidase b2324. Either of these types of cells, when comprising a nucleic acid encoding a heterologous polypeptide, produces an N-terminal unclipped polypeptide when it is cultured, and the polypeptide are recovered, with virtually no N-terminal clipped polypeptide produced as an impurity. A method for cleaving an N-terminal amino acid from a polypeptide includes bringing the polypeptide into contact with an aminopeptidase sharing at least 80% sequence identity with the native sequence of aminopeptidase b2324. COPYRIGHT: (C)2011,JPO&INPIT
    • 待解决的问题:为了提供存在于野生型这样的细胞中的染色体基因缺失的革兰氏阴性细菌细胞,其基因与yfcK基因的天然序列共享至少80%的序列同一性并且编码 氨基肽酶。 解决方案:革兰氏阴性细菌细胞缺乏存在于野生型这样的细胞中的染色体基因,其基因与氨基肽酶b2324的天然序列共享至少80%的序列同一性。 当包含编码异源多肽的核酸时,这些类型的细胞中的任何一种在培养时产生N-末端未剪切的多肽,并且回收多肽,实际上没有产生作为杂质的N-末端剪切的多肽。 从多肽切割N末端氨基酸的方法包括使多肽与氨基肽酶b2324的天然序列具有至少80%序列同一性的氨基肽酶接触。 版权所有(C)2011,JPO&INPIT