ANALYSIS OF NON-ENZYMATIC POSTTRANSLATIONAL MODIFICATED (GLYCATED) ALBUMIN BY NANO-LC/MS/MS

0436493 - FGÚ 2015 RIV CZ eng C - Conference Paper (international conference)
Šťastná, Zdeňka - Pataridis, Statis - Sedláková, Pavla - Mikšík, Ivan
ANALYSIS OF NON-ENZYMATIC POSTTRANSLATIONAL MODIFICATED (GLYCATED) ALBUMIN BY NANO-LC/MS/MS.
CECE 2012. 9th International Interdisciplinary Meeting on Bioanalysis. Brno: Ústav analytické chemie AV ČR, v. v. i, 2012 - (Foret, F.; Křenková, J.; Guttman, A.; Klepárník, K.; Boček, P.), s. 61-65. ISBN 978-80-904959-1-3.
[CECE 2012. International Interdisciplinary Meeting on Bioanalysis /9./. Brno (CZ), 01.11.2012-02.11.2012]
R&D Projects: GA ČR(CZ) GAP206/12/0453; GA ČR(CZ) GA203/08/1428
Institutional support: RVO:67985823
Keywords : non-enzymatic glycation * serum albumin
Subject RIV: CB - Analytical Chemistry, Separation

Posttranslational modifications of proteins are important reactions, which significantly affect the function of proteins in the organism. In principle, they can be divided into enzymatic and non-enzymatic modifications. Non-enzymatic reactions include glycation (earlier called nonezymatic glycosylation), which plays an important role in the development of chronic complications of diabetes mellitus, uremia, in the process of aging and degeneration of the brain.This work deals with the study of glycated albumins (human serum albumin and bovine serum albumin). Methodologically we used nano-liquid chromatography coupled to Q-TOF mass spectrometer. In vitro modified proteins were cleavaged by trypsin and arising peptides were separated on C18 nano column with trap-column. Peptides and their modifications were analysed by high-resolution Q-TOF mass spectrometer MaXis with precision determination of mass below 2 ppm. We found some modifications of proteins. Besides well known carboxymethyllysine new ones were determined - create mass shift 78, 132 and 218. Origin of these modifications is discussed and possible structure is presented. All found modifications were allocated to the structure of proteins and reactivity to various oxo-compounds was also examined
Permanent Link: http://hdl.handle.net/11104/0240234