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J Proteome Res. 2013 Jan 4;12(1):299-307. doi: 10.1021/pr3009308. Epub 2012 Dec 20.

RNA deep sequencing as a tool for selection of cell lines for systematic subcellular localization of all human proteins.

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Science for Life Laboratory, KTH - Royal Institute of Technology, SE-171 21 Stockholm, Sweden.


One of the major challenges of a chromosome-centric proteome project is to explore in a systematic manner the potential proteins identified from the chromosomal genome sequence, but not yet characterized on a protein level. Here, we describe the use of RNA deep sequencing to screen human cell lines for RNA profiles and to use this information to select cell lines suitable for characterization of the corresponding gene product. In this manner, the subcellular localization of proteins can be analyzed systematically using antibody-based confocal microscopy. We demonstrate the usefulness of selecting cell lines with high expression levels of RNA transcripts to increase the likelihood of high quality immunofluorescence staining and subsequent successful subcellular localization of the corresponding protein. The results show a path to combine transcriptomics with affinity proteomics to characterize the proteins in a gene- or chromosome-centric manner.

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