Publication: Large-scale speciation of selenium in rice proteins using ICP-MS assisted electrospray MS/MS proteomics
Issued Date
2014-03-01
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ISSN
1756591X
17565901
17565901
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2-s2.0-84896809697
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Mahidol University
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SCOPUS
Bibliographic Citation
Metallomics. Vol.6, No.3 (2014), 646-653
Suggested Citation
Pracha Cheajesadagul, Juliusz Bianga, Carine Arnaudguilhem, Ryszard Lobinski, Joanna Szpunar Large-scale speciation of selenium in rice proteins using ICP-MS assisted electrospray MS/MS proteomics. Metallomics. Vol.6, No.3 (2014), 646-653. doi:10.1039/c3mt00299c Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/33298
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Title
Large-scale speciation of selenium in rice proteins using ICP-MS assisted electrospray MS/MS proteomics
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Abstract
A Se-targeted bottom-up proteomics approach was developed for the identification of Se-containing proteins in rice grown naturally on seleniferous soils. The proteins were separated by 2D gel electrophoresis. The position of Se-containing spots was tentatively identified by the correlation between the 1D isoelectrofocusing (IEF) and 1D SDS electropherograms of a sample aliquot and confirmed by 78Se imaging in the 2D gel. The method was complemented by the ICP-MS assisted shotgun proteomics approach. The proteins were identified by capHPLC with the dual ICP MS and electrospray Orbitrap MS detection. The first ever comprehensive study of rice selenoproteome revealed the presence of selenium, as both selenomethionine (SeMet) and selenocysteine (SeCys) residues, in a dozen proteins including a 19 kDa globulin, granule-bound starch synthase, and the family of glutelin-type seed storage proteins. © 2014 The Royal Society of Chemistry.