Mutant proteins in the dna-binding domain of a trlomeric...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/09 (2006.01) C07K 14/47 (2006.01) C07K 16/18 (2006.01) C12N 1/15 (2006.01) C12N 1/19 (2006.01) C12N 1/21 (2006.01) C12N 5/10 (2006.01) C12P 21/02 (2006.01) C12Q 1/68 (2006.01) G01N 33/15 (2006.01) G01N 33/50 (2006.01) G01N 33/53 (2006.01)

Patent

CA 2557374

A TRF2 DNA-binding domain mutant protein represented by the following (a) or (b) or its salt. (a) A protein having an amino acid sequence derived from the amino acid sequence of wild type hTRF2 DNA-binding domain by at least one substitution selected from among the substitution of lysine at the 10-position into arginine, the substitution of alanine at the 34-position into serine, the substitution of alanine at the 47-position into serine and the substitution of arginine at the 59-position into lysine. (b) A protein having an amino acid sequence derived form the amino acid sequence of the protein of the above (a) by deletion, substitution or addition of one to several amino acids other than the amino acid at the 10-position, the amino acid at the 34-position, the amino acid at the 47-position and the amino acid at the 59-position, and being superior in the ability to binding to a double-stranded DNA containing a sequence represented by 5~-TTAGGG-3~ to wild type TRF2 DNA-binding domain having the amino acid sequence represented by SEQ ID NO:2.

La présente invention a trait à une protéine mutante à domaine de liaison à l'ADN TRF2 représentée par (a) ou (b) ci-dessous ou son sel. (a) une protéine comportant une séquence d'acides aminés dérivée de la séquence d'acides aminés de domaine de liaison à l'ADN hTRF2 de type sauvage par au moins une substitution choisie parmi la substitution de lysine à la position 10 en arginine, la substitution d'alanine à la position 34 en sérine, la substitution d'alanine en position 47 en sérine et la substitution d'arginine à la position 59 en lysine; (b) une protéine comportant une séquence d'acides aminés dérivée de la séquence d'acides aminés de la protéine mentionnée en (a) par la délétion, substitution ou addition d'un à plusieurs acides aminés autre(s) que l'acide aminé à la position 10, l'acide aminé à la position 47 et l'acide aminé à la position 59, et étant supérieure en capacité de liaison à un ADN à double brin contenant une séquence représentée par 5'-TTAGG-3' au domaine de liaison à l'ADN hTRF2 de type sauvage comportant la séquence d'acides aminés représentée par SEQ. ID. NO:2.

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