Source:http://linkedlifedata.com/resource/pubmed/id/15032356
Switch to
Predicate | Object |
---|---|
rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1-2
|
pubmed:dateCreated |
2004-3-22
|
pubmed:abstractText |
Pre-fractionation of a complex mixture of proteins increases the resolution in analytical separations of proteins from cells, tissues or organisms. Here we demonstrate a novel method for pre-fractionation of membrane proteins by a detergent-based aqueous two-phase system. Membrane proteins are strongly under-represented in proteomic studies based on two-dimensional electrophoresis (2-DE). As a model system, we have isolated mitochondria from the yeast Saccharomyces cerevisiae. Mitochondrial proteins were fractionated in an aqueous two-phase system consisting of the polymer poly(ethylene glycol) and either of two commonly used non-ionic detergents, Triton X-114 or dodecyl maltoside (DDM). Soluble proteins partitioned mainly to the polymer phase while membrane proteins were enriched in the detergent phase, as identified from one-dimensional electrophoresis (1-DE) and/or 2-DE followed by mass spectrometric analysis. Pre-fractionation was further enhanced by addition of an anionic detergent, sodium dodecyl sulfate, or a chaotropic salt, NaClO4, and by raising the pH in the system. The two-phase system pre-fractionation was furthermore combined with an alternative two-dimensional high-resolution separation method, namely ion-exchange chromatography and 1-DE. By this approach a larger number of membrane proteins could be identified compared to separation with conventional 2-DE. Thus, pre-fractionation of complex protein mixtures using the aqueous two-phase systems developed here will help to disclose larger proportions of membrane proteins in different proteomes.
|
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:chemical | |
pubmed:status |
MEDLINE
|
pubmed:month |
Mar
|
pubmed:issn |
0021-9673
|
pubmed:author | |
pubmed:issnType |
Print
|
pubmed:day |
12
|
pubmed:volume |
1029
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
113-24
|
pubmed:dateRevised |
2009-1-15
|
pubmed:meshHeading |
pubmed-meshheading:15032356-Chromatography, Ion Exchange,
pubmed-meshheading:15032356-Detergents,
pubmed-meshheading:15032356-Electrophoresis, Polyacrylamide Gel,
pubmed-meshheading:15032356-Membrane Proteins,
pubmed-meshheading:15032356-Polymers,
pubmed-meshheading:15032356-Proteomics,
pubmed-meshheading:15032356-Saccharomyces cerevisiae,
pubmed-meshheading:15032356-Spectrometry, Mass, Matrix-Assisted Laser...
|
pubmed:year |
2004
|
pubmed:articleTitle |
Protein pre-fractionation in detergent-polymer aqueous two-phase systems for facilitated proteomic studies of membrane proteins.
|
pubmed:affiliation |
Department of Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
|
pubmed:publicationType |
Journal Article
|