Complementary MALDI MS and SALD ICP MS detection of a single separation record for metalloprotein analaysis

Logo poskytovatele
Logo poskytovatele

Varování

Publikace nespadá pod Fakultu sportovních studií, ale pod Středoevropský technologický institut. Oficiální stránka publikace je na webu muni.cz.
Autoři

TOMALOVÁ Iva FOLTYNOVÁ Pavla KANICKÝ Viktor PREISLER Jan

Rok publikování 2013
Druh Konferenční abstrakty
Fakulta / Pracoviště MU

Středoevropský technologický institut

Citace
Popis Metals play a crucial role in physiology and pathology of biological systems. It has been estimated that the metalloproteins encompass about one third of all proteins. A novel method for comprehensive multidimensional analysis of metalloproteins is presented here. This approach is based on an off-line coupling of a single micro-column separation run to both substrate-assisted laser desorption (SALD) inductively coupled plasma (ICP) mass spectrometry (MS) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI) MS. The effluent fractions are collected on a custom-designed Au-coated polyethylene terephthalate glycol (PETG) sample target that is compatible to both MS methods. The whole concept is demonstrated on analysis of rabbit-liver metallothionein (MT) isoform mixture. The MTs are separated by capillary electrophoresis (CE) coupled to MALDI MS/SALD ICP MS via a liquid junction interface and a sub-atmospheric deposition chamber. MALDI MS and SALD ICP MS provide information about both molecular mass of present proteins and metal distribution and quantity, respectively. We believe the presented method is a viable alternative to on-line coupling employing electrospray ionization and nebulizer ICP MS. The off-line hyphenation allows decoupling separation and both detection processes in time and space and offers further options, e.g. re-analysis or archiving of the separation record, laser-induced fluorescence detection or on target protein digestion.
Související projekty:

Používáte starou verzi internetového prohlížeče. Doporučujeme aktualizovat Váš prohlížeč na nejnovější verzi.

Další info