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

Identification of a rat 30-kDa protein recognized by the antibodies to a recombinant rat cutaneous fatty acid-binding protein as a 14-3-3 protein.

Immunoblot analysis with polyclonal antibodies raised against a recombinant rat cutaneous fatty acid-binding protein revealed a 30-kDa protein other than the 15-kDa fatty acid-binding protein in rat skin cytosol. This protein was present in a number of rat organs and in mouse 3T3 L1 cells. The amino acid sequences of the enzymatic peptides of the 30-kDa protein extracted from SDS-PAGE gels suggested that it was a mixture of the subunits of the eukaryotic signaling molecule, 14-3-3 protein. Glutathione S-transferase fusion proteins of 14-3-3 protein subunits were examined for cross-reaction by Western blotting, and the epsilon-subunit alone was found to be immunoreactive, so far as tested. It is likely that the 30-kDa protein detected in the rat tissues by the antibodies is the 14-3-3 protein epsilon-subunit. Although there is no apparent sequence similarity between the fatty acid-binding protein and the 14-3-3 protein subunit, they appear to share a common structural element recognized by the antibodies. Since 14-3-3 proteins and fatty acid-binding proteins are known to interact with a wide variety of cellular proteins, the presence of a common local structure might mutually modulate such interactions.[1]


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