title: Low-molecular weight protein profiling of genetically modified maize using fast liquid chromatography electrospray ionization and time-of-flight mass spectrometry.
abstract: In this work, the use of liquid chromatography coupled to electrospray time-of-flight mass spectrometry (LC-TOFMS) has been evaluated for the profiling of relatively low-molecular weight protein species in both genetically modified (GM) and non-GM maize. The proposed approach consisted of a straightforward sample fractionation with different water and ethanol-based buffer solutions followed by separation and detection of the protein species using liquid chromatography with a small particle size (1.8 μm) C(18)  column and electrospray-time-of-flight mass spectrometry detection in the positive ionization mode. The fractionation of maize reference material containing different content of transgenic material (from 0 to 5% GM) led to five different fractions (albumins, globulins, zeins, zein-like glutelins, and glutelins), all of them containing different protein species (from 2 to 52 different species in each fraction). Some relevant differences in the quantity and types of protein species were observed in the different fractions of the reference material (with different GM contents) tested, thus revealing the potential use of the proposed approach for fast protein profiling and to detect tentative GMO markers in maize.
authors: Department of Chemistry, University of Warsaw, Warsaw, Poland.
authors: Anna
authors: A
authors: Koc
authors: Ana
authors: A
authors: Cañuelo
authors: Juan F
authors: JF
authors: Garcia-Reyes
authors: Antonio
authors: A
authors: Molina-Diaz
authors: Marek
authors: M
authors: Trojanowicz
mesh_terms: D002853:Chromatography, Liquid / Q000295:instrumentation / Q000379:methods*; D008970:Molecular Weight; D010940:Plant Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D030821:Plants, Genetically Modified / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry; D003313:Zea mays / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism
chemical_list: D010940:Plant Proteins