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    • 72. 发明申请
    • CYSTEINE-FREE INTEINS
    • WO2020249723A1
    • 2020-12-17
    • PCT/EP2020/066291
    • 2020-06-12
    • WESTFÄLISCHE WILHELMS-UNIVERSITÄT MÜNSTERYEDA RESEARCH & DEVELOPMENT CO. LTD
    • MOOTZ, Henning D.BHAGAWATI, ManirajTERHORST, TobiasPIETROKOVSKI, Shmuel
    • C07K14/005
    • The present invention relates to an isolated polypeptide or to a composition of isolated polypeptides comprising (a) at least one first intein amino acid sequence (a1) and at least one first extein amino acid sequence (a2); wherein the at least one first intein amino acid sequence is an N-terminal sequence of a split intein or fragment thereof; wherein the at least one first extein sequence is fused to the N-terminus of the at least one first intein sequence and has a length of at least 1; and (b) at least one second intein amino acid sequence (b1) and at least one second extein sequence (b2); wherein the at least one second intein sequence is a C-terminal sequence of a split intein or fragment thereof; wherein the at least one second extein sequence is fused to the C-terminus of the at least one second intein sequence and has a length of at least 1; wherein the catalytic motifs of the at least one first intein amino acid sequence and/or of the at least one second intein amino acid sequence are free of cysteine residues; wherein the first and second intein amino acid sequence specifically interact with each other. Additionally, the invention relates to at least one isolated nucleic acid molecule comprising at least one nucleotide sequence encoding an isolated polypeptide according to the invention or a homolog, variant or complement thereof. Finally, the invention pertains to a method for modifying amino acid sequences or to a use of said isolated polypeptide(s) or said at least one isolated nucleic acid molecule.