Morphological change caused by loss of the taxon-specific polyalanine tract in Hoxd-13

被引:23
作者
Anan, Keiiti [1 ]
Yoshida, Nobuaki
Kataoka, Yuki
Sato, Mitsuharu
Ichise, Hirotake
Nasu, Makoto
Ueda, Shintaroh
机构
[1] Univ Tokyo, Grad Sch Sci, Dept Biol Sci, Tokyo 106, Japan
[2] Univ Tokyo, Inst Med Sci, Lab Gene Express & Regulat, Tokyo 106, Japan
关键词
homopolymeric amino acid repeats; polyalanine tract; Hoxd-13; mouse model;
D O I
10.1093/molbev/msl161
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Sequence comparison of Hoxd-13 among vertebrates revealed the presence of taxon-specific polyalanine tracts in amniotes. To investigate their function at the organismal level, we replaced the wild-type Hoxd-13 gene with one lacking the 15-residue polyalanine tract by using homologous recombination. Sesamoid bone formation in knock-in mice was different from that in the wild type; this was observed not only in the homozygotes but also in the heterozygotes. The present study provides the first direct evidence that taxon-specific homopolymeric amino acid repeats are involved in phenotypic diversification at the organismal level.
引用
收藏
页码:281 / 287
页数:7
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