Functional Characterization of a Single Nucleotide Polymorphism in the 3' Untranslated Region of Sheep DLX3 Gene

PloS One
Enguang RongNing Wang

Abstract

The Distal-less 3 (homeobox protein DLX-3), a transcription factor, is critical for the development of hair follicle and hair formation and regeneration. We previously identified and found that four SNPs (c. *118T>C, c. *228T>C, c. *688A>G and c. *1,038_1,039 insC) in 3' untranslated region (UTR) of sheep DLX3 were in high linkage disequilibrium with each other and significantly associated with wool crimp (P<0.05), however, the underlying mechanisms by which these SNPs affect the wool crimp remains unknown. In the present study, we performed association analysis between these four identified SNPs and DLX3 gene expression in sheep skin using quantitative real-time RT-PCR. The results showed that these SNPs were significantly associated with sheep skin DLX3 mRNA expression levels. Then, we constructed DLX3 3'UTR luciferase reporters and validated the association. The reporter assays showed that the three major haplotypes, derived from the four SNPs, had significantly different effects on luciferase reporter activity and the four SNPs also had significantly different allelic effects on the luciferase reporter activity (p < 0.05). Bioinformatics analysis showed that the SNP (c. *1,038_1,039 insC) was located within a potential miR-...Continue Reading

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Methods Mentioned

BETA
Transfection
electrophoresis
thermal dissociation
genotyping
PCRs

Software Mentioned

JMP5
Microinspector
TargetScan

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