2017
Beta-secretase kinetics detected by MALDI TOF MS
MACHÁLKOVÁ, Markéta; Jan SCHEJBAL; Zdeněk GLATZ a Jan PREISLERZákladní údaje
Originální název
Beta-secretase kinetics detected by MALDI TOF MS
Název česky
Kinetika beta-sekretasy detekovaná pomocí MALDI TOF MS
Autoři
MACHÁLKOVÁ, Markéta; Jan SCHEJBAL; Zdeněk GLATZ a Jan PREISLER
Vydání
ČSHS 2017, 2017
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10406 Analytical chemistry
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Označené pro přenos do RIV
Ne
Organizační jednotka
Přírodovědecká fakulta
ISBN
978-80-905045-7-8
Klíčová slova česky
beta-sekretasa, MALDI, kinetika, hmotnostní spektrometrie
Klíčová slova anglicky
beta-secretase, MALDI, kinetics, mass spectrometry
Změněno: 26. 1. 2018 08:24, prof. RNDr. Zdeněk Glatz, CSc.
Anotace
V originále
Alzheimer’s disease is a serious neurodegenerative illness affecting around 44 million people worldwide. The crucial role in disease development possibly plays the β-site APP-cleaving enzyme (β-secretase, BACE). Its overexpression leads to the production of αβ peptide (αβ42 rather than αβ40 isoform) and to the accumulation of toxic amyloid plaques in brain [1]. β-secretase activity can be measured by a commercial fluorescence resonance energy transfer (FRET) assay with fluorescently marked substrates, however, this approach is relatively insensitive and requires high concentrations of the enzyme. Alternative option is the detection of reaction products by mass spectrometry. Two distinctive techniques were established for this purpose, the first involving the capillary electrophoresis separation and electrospray mass spectrometry detection (CE-ESI MS). The advantages of this method are both sensitivity and preciseness, yet, it includes the time consuming separation step [2]. The separation may be completely omitted if using matrix-assisted laser desorption/ionization (MALDI), which employs UV-laser to desorb and generate ion molecules from the sample surface [3]. While MALDI is not perceived as quantitative in general, we showed that with suitable internal standard, it may represent easy and accurate method useful in enzymatic research. The Km for selected substrate and IC50 values for β-secretase inhibitor were in a good agreement with results obtained by CE-ESI MS.
Návaznosti
| GA15-05387S, projekt VaV |
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| GA16-06106S, projekt VaV |
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| LQ1601, projekt VaV |
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| MUNI/A/1278/2016, interní kód MU |
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