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

Molecular cloning and amino acid sequence of human plakoglobin, the common junctional plaque protein.

Plakoglobin is a major cytoplasmic protein that occurs in a soluble and a membrane-associated form and is the only known constituent common to the submembranous plaques of both kinds of adhering junctions, the desmosomes and the intermediate junctions. Using a partial cDNA clone for bovine plakoglobin, we isolated cDNAs encoding human plakoglobin, determined its nucleotide sequence, and deduced the complete amino acid sequence. The polypeptide encoded by the cDNA was synthesized by in vitro transcription and translation and identified by its comigration with authentic plakoglobin in two-dimensional gel electrophoresis. The identity was further confirmed by comparison of the deduced sequence with the directly determined amino acid sequence of two fragments from bovine plakoglobin. Analysis of the plakoglobin sequence showed the protein (744 amino acids; 81,750 Da) to be unrelated to any other known proteins, highly conserved between human and bovine tissues, and characterized by numerous changes between hydrophilic and hydrophobic sections. Only one kind of plakoglobin mRNA (3.4 kilobases) was found in most tissues, but an additional mRNA (3.7 kilobases) was detected in certain human tumor cell lines. This longer mRNA may be represented by a second type of plakoglobin cDNA, which contains an insertion of 297 nucleotides in the 3' non-coding region.[1]

References

  1. Molecular cloning and amino acid sequence of human plakoglobin, the common junctional plaque protein. Franke, W.W., Goldschmidt, M.D., Zimbelmann, R., Mueller, H.M., Schiller, D.L., Cowin, P. Proc. Natl. Acad. Sci. U.S.A. (1989) [Pubmed]
 
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