| Literature DB >> 17583932 |
Michael J Rindler1, Chong-Feng Xu, Iwona Gumper, Nora N Smith, Thomas A Neubert.
Abstract
The composition of zymogen granules from rat pancreas was determined by LC-MS/MS. Enriched intragranular content, peripheral membrane, and integral membrane protein fractions were analyzed after one-dimensional SDS-PAGE and tryptic digestion of gel slices. A total of 371 proteins was identified with high confidence, including 84 previously identified granule proteins. The 287 remaining proteins included 37 GTP-binding proteins and effectors, 8 tetraspan membrane proteins, and 22 channels and transporters. Seven proteins, pantophysin, cyclic nucleotide phosphodiesterase, carboxypeptidase D, ecto-nucleotide phosphodiesterase 3, aminopeptidase N, ral, and the potassium channel TWIK-2, were confirmed by immunofluorescence microscopy or by immunoblotting to be new zymogen granule membrane proteins.Entities:
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Year: 2007 PMID: 17583932 PMCID: PMC2582026 DOI: 10.1021/pr0607029
Source DB: PubMed Journal: J Proteome Res ISSN: 1535-3893 Impact factor: 4.466