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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Genomic structure and an alternative transcript of bovine mitochondrial glycerol-3-phosphate acyltransferase gene (GPAM).

GPAM maps in BTA26q22, where several QTLs affecting milk production, milk fat and protein content have been mapped. On the basis of the QTL location, the GPAM gene could be considered a good candidate gene for the mentioned traits. Glycerol-3-phosphate acyltransferase mitochondrial (GPAM) is the enzyme that catalyses the initial and committed step of glycerolipid synthesis and, therefore, it is a potential site for triacylglycerol synthesis regulation. In this study, the structure of the cDNA and the genomic DNA of the bovine GPAM gene were determined and the expression of its mRNA was studied. The cDNA of the gene was cloned by RT-PCR, 5' and 3' rapid amplification of cDNA ends. The GPAM mRNA sequence contains a 2,475-bp coding region and a 3,689-bp 3' UTR. Its ORF encoded for an 825-amino acid protein and has an 89% homology with the coding regions of previously characterized mouse and human GPAM genes. The predicted amino acid sequence had an 89 and 93% similarity with mouse and human GPAM proteins, respectively. Using a 5' RACE strategy, two different 5' UTRs were cloned. Northern blot analysis confirmed the presence of two different transcripts. Adipose tissues and lung had the highest levels of GPAM mRNA expression, whereas it was barely detectable in liver. This expression pattern differs with those of non-ruminant animals where liver is one of the tissues with higher GPAM mRNA expression level.[1]

References

  1. Genomic structure and an alternative transcript of bovine mitochondrial glycerol-3-phosphate acyltransferase gene (GPAM). Roy, R., Ordovas, L., Taourit, S., Zaragoza, P., Eggen, A., Rodellar, C. Cytogenet. Genome Res. (2006) [Pubmed]
 
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