Mouse in which genome is modified
A mouse or progenies thereof in which genome is modified so as to have decreased or deleted activity of an enzyme relating to modification of a sugar chain in which the 1 -position of fucose is bound to the 6 -position of N-acetylglucosamine in the reducing end through α-bond in a complex N-glycoside-linked complex sugar chain.
1 . A mouse or progenies thereof in which genome is modified so as to have decreased or deleted activity of an enzyme relating to modification of a sugar chain in which the 1-position of fucose is bound to the 6-position of N-acetylglucosamine in the reducing end through α-bond in a complex N-glycoside-linked complex sugar chain.
2 . The mouse or progenies thereof according to claim 1 , wherein a genomic gene of the enzyme relating to modification of a sugar chain in which the 1-position of fucose is bound to the 6-position of N-acetylglucosamine in the reducing end through α-bond in a complex N-glycoside-linked complex sugar chain is knocked out.
3 . The mouse or progenies thereof according to claim 1 , wherein all alleles on the genome of the enzyme relating to modification of a sugar chain in which the 1-position of fucose is bound to the 6-position of N-acetylglucosamine in the reducing end through α-bond in a complex N-glycoside-linked complex sugar chain are knocked out.
4 . The mouse or progenies thereof according to claim 1 , wherein the enzyme relating to modification of a sugar chain in which the 1-position of fucose is bound to the 6-position of N-acetylglucosamine in the reducing end through α-bond in a complex N-glycoside-linked complex sugar chain is an α1,6-fucosyltransferase.
5 . The mouse or progenies thereof according to claim 4 , wherein the α1,6-fucosyltransferase is a protein encoded by a DNA selected from the following (a) and (b):
(a) a DNA which comprises the nucleotide sequence represented by SEQ ID NO:2; and
(b) a DNA which hybridizes with the DNA comprising the nucleotide sequence represented by SEQ ID NO:2 under stringent conditions and encodes a protein having α1,6-fucosyltransferase activity.
6 . The mouse or progenies thereof according to claim 4 , wherein the α1,6-fucosyltransferase is a protein selected from the group consisting of the following (a), (b) and (c):
(a) a protein which comprises the amino acid sequence represented by SEQ ID NO:1;
(b) a protein which comprises an amino acid sequence in which at least one amino acid in the amino acid sequence represented by SEQ ID NO:1 is deleted, substituted, inserted and/or added, and has α1,6-fucosyltransferase activity; and
(c) a protein which comprises an amino acid sequence having 80% or more of homology with the amino acid sequence represented by SEQ ID NO:1, and has α1,6-fucosyltransferase activity.