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. 1989 Aug;8(8):2217–2223. doi: 10.1002/j.1460-2075.1989.tb08345.x

A protein induced by NGF in PC12 cells is stored in secretory vesicles and released through the regulated pathway.

R Possenti 1, J D Eldridge 1, B M Paterson 1, A Grasso 1, A Levi 1
PMCID: PMC401151  PMID: 2676516

Abstract

We have previously described the isolation of a cDNA clone corresponding to an mRNA rapidly induced to high levels in PC12 cells by treatment with NGF. We report here the complete amino acid sequence of the protein (named VGF8a) as deduced by nucleotide sequencing of overlapping cDNA clones. VGF8a is particularly rich in proline residues and has a conspicuous number of short stretches of basic amino acid residues which may represent potential targets for proteolytic cleavage. Antibodies directed against recombinant VGF8a-beta-galactosidase fusion proteins were used for immunofluorescent staining of the protein in PC12 cells as well as for its localization, by Western blot analysis, in subfractions of cell homogenates. We demonstrate that in PC12 cells, VGF8a protein is stored in secretory vesicles and is released in response to a variety of stimuli that are known to induce the regulated secretion of neurotransmitters.

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