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1 February 2019 Multiple Conserved Elements Structuring Inverted Repeats in the Mammalian Coat Color-Related Gene Asip
Yuki Sakuma, Masatoshi Matsunami, Toyoyuki Takada, Hitoshi Suzuki
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Abstract

In the agouti signaling gene protein (Asip) of the house mouse (Mus musculus), inverted repeat (IR) arrays are known to exist in a non-coding region adjacent to the ventral-specific promoter region and the accompanying two exons (exons 1A and 1A′), which are around 100 kb upstream from the amino acid coding regions of exons 2, 3, and 4. To determine the gene structure of mammalian Asip and to elucidate trends in its evolution, non-coding sequences of six rodent (mouse, rat, Chinese hamster, squirrel, guinea pig, and naked mole rat) and three non-rodent (rabbit, human, and cow) species were retrieved from databases and compared. Our homology search analyses revealed the presence of three to five highly conserved non-coding elements (CNE). These CNEs were found to form IRs in rodents and lagomorphs. Combinations of IRs were further shown to build symmetric, long IR arrays. Intra- and inter-specific comparisons of the sequences of three universal CNEs showed homogeneity between CNE pairs within species. This implies that certain evolutionary constraints maintained the IR structure in the rodent and rabbit species.

© 2019 Zoological Society of Japan
Yuki Sakuma, Masatoshi Matsunami, Toyoyuki Takada, and Hitoshi Suzuki "Multiple Conserved Elements Structuring Inverted Repeats in the Mammalian Coat Color-Related Gene Asip," Zoological Science 36(1), 23-30, (1 February 2019). https://doi.org/10.2108/zs180081
Received: 7 May 2018; Accepted: 17 September 2018; Published: 1 February 2019
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KEYWORDS
ASIP
concerted evolution
conserved non-coding element
inverted repeats
mammals
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