Functional characterisation of the bovine neuropeptide Y gene promoter and evaluation of the transcriptional activities of promoter haplotypes

Neuropeptide Y (NPY) is a potent orexigenic agent. The molecular mechanisms underlying the regulation of bovine NPY gene expression by its promoter region is currently unknown. The objectives of this research were to: (i) identify the SNPs in the promoter region of the bovine NPY gene, (ii) investig...

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Veröffentlicht in:Molecular biology reports 2012-02, Vol.39 (2), p.919-928
Hauptverfasser: Alam, Tanweer, Bahar, Bojlul, Waters, Sinéad M., McGee, Mark, O’Doherty, John V., Sweeney, Torres
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container_title Molecular biology reports
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creator Alam, Tanweer
Bahar, Bojlul
Waters, Sinéad M.
McGee, Mark
O’Doherty, John V.
Sweeney, Torres
description Neuropeptide Y (NPY) is a potent orexigenic agent. The molecular mechanisms underlying the regulation of bovine NPY gene expression by its promoter region is currently unknown. The objectives of this research were to: (i) identify the SNPs in the promoter region of the bovine NPY gene, (ii) investigate the effects of these SNPs by measuring promoter transcriptional activities of different bovine NPY promoter haplotypes and; (iii) identify the minimal promoter region (MPR) required for basal activity of the NPY gene in vitro. Seventeen SNPs were identified in the promoter region. Of these, 14 affected putative transcription factors binding motifs including a TATA binding protein factor at −20, GC-Box factors SP1 at −170 and GATA binding motifs at −120 and −347. The SNPs were assigned to five major haplotypes (BtNPY_H1-5), of which BtNPY_H5 had maximum transcriptional activity. The region extending to −134 nt was identified as the MPR. This MPR was confirmed by the identification of a putative TATA box (−29 nt) and two SP1/GC binding sites (−94 and −118 nt), within this region. However, promoter expression was significantly enhanced when the construct contained the −614 to −1019 nt region. In conclusion, a number of SNPs characterised in the bovine NPY promoter especially those affecting the transcription factor binding sites, enhancer and repressor regions have the potential to affect NPY gene expression. Natural variation exists in the promoter region of the bovine NPY gene, which should be further explored for selection of energetic efficiency in cattle.
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The molecular mechanisms underlying the regulation of bovine NPY gene expression by its promoter region is currently unknown. The objectives of this research were to: (i) identify the SNPs in the promoter region of the bovine NPY gene, (ii) investigate the effects of these SNPs by measuring promoter transcriptional activities of different bovine NPY promoter haplotypes and; (iii) identify the minimal promoter region (MPR) required for basal activity of the NPY gene in vitro. Seventeen SNPs were identified in the promoter region. Of these, 14 affected putative transcription factors binding motifs including a TATA binding protein factor at −20, GC-Box factors SP1 at −170 and GATA binding motifs at −120 and −347. The SNPs were assigned to five major haplotypes (BtNPY_H1-5), of which BtNPY_H5 had maximum transcriptional activity. The region extending to −134 nt was identified as the MPR. 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subjects Animal Anatomy
Animal Biochemistry
Animals
Base Sequence
Biomedical and Life Sciences
Cattle - genetics
DNA Primers - genetics
Enhancers
Gene expression
Gene Expression Regulation - genetics
Genetic Variation
Guanylate cyclase
Haplotypes
Haplotypes - genetics
Histology
Life Sciences
Linear Models
Linkage Disequilibrium
Molecular biology
Molecular modelling
Molecular Sequence Data
Morphology
Neuropeptide Y
Neuropeptide Y - genetics
Neuropeptide Y - metabolism
Peptides
Polymerase Chain Reaction
Polymorphism
Polymorphism, Single Nucleotide - genetics
Promoter Regions, Genetic - genetics
Promoters
Protein Interaction Domains and Motifs - genetics
Repressors
Sequence Analysis, DNA
Single-nucleotide polymorphism
Sp1 protein
Tata box
TATA-binding protein
Transcription factors
title Functional characterisation of the bovine neuropeptide Y gene promoter and evaluation of the transcriptional activities of promoter haplotypes
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