HiRIEF LC-MS enables deep proteome coverage and unbiased proteogenomics.

Branca RM, Orre LM, Johansson HJ, Granholm V, Huss M, Pérez-Bercoff Å, Forshed J, Käll L, Lehtiö J

Nat. Methods 11 (1) 59-62 [2014-01-00; online 2013-11-17]

We present a liquid chromatography-mass spectrometry (LC-MS)-based method permitting unbiased (gene prediction-independent) genome-wide discovery of protein-coding loci in higher eukaryotes. Using high-resolution isoelectric focusing (HiRIEF) at the peptide level in the 3.7-5.0 pH range and accurate peptide isoelectric point (pI) prediction, we probed the six-reading-frame translation of the human and mouse genomes and identified 98 and 52 previously undiscovered protein-coding loci, respectively. The method also enabled deep proteome coverage, identifying 13,078 human and 10,637 mouse proteins.

Affiliated researcher

PubMed 24240322

DOI 10.1038/nmeth.2732

Crossref 10.1038/nmeth.2732

pii: nmeth.2732