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

Molecular cloning and mRNA expression of the bovine insulin-responsive glucose transporter (GLUT4).

Insulin-response glucose transporter GLUT4 is a member of the glucose transporter family (GLUT) and is present exclusively in muscle and adipose tissue. It is a target of insulin action in humans and rodents. To clarify the molecular structure of bovine GLUT4, its GLUT4 cDNA was cloned by the RT-PCR method. Several cDNA clones corresponding to the different regions of GLUT4 were obtained by amplifying reverse-transcriptase products of RNA extracted from Holstein cattle skeletal muscle. Nucleotide sequence analysis of the cDNA clones revealed that bovine GLUT4 cDNA was composed of 2,656 base pairs with a coding region for a 509 amino acid protein. The deduced amino acid sequence was 64% and 92% identical with bovine GLUT1 (GLUT ubiquitously expressed in all tissues) and rat GLUT4, respectively. Although the amino acid sequence of the GLUT4 COOH-terminal region is highly conserved among the species so far reported, one amino acid (Asp) of the region was replaced by His in bovine GLUT4. The tissue distribution of GLUT4 was also examined by Northern blot analysis using a probe prepared from the bovine cDNA. GLUT4 mRNA was detected in skeletal muscle, heart, and adipose tissue, but not in liver, kidney, lung, brain, or spleen. Such a distribution is essentially the same as in humans and rodents, suggesting that GLUT4 is an insulin-responsive glucose transporter in cattle.[1]


  1. Molecular cloning and mRNA expression of the bovine insulin-responsive glucose transporter (GLUT4). Abe, H., Morimatsu, M., Nikami, H., Miyashige, T., Saito, M. J. Anim. Sci. (1997) [Pubmed]
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