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- W2551701542 abstract "Over the past two decades, orthogonal acceleration time-of-flight has been the de facto analyzer for solution and membrane-soluble protein native mass spectrometry (MS) studies; this however is gradually changing. Three MS instruments are compared, the Q-ToF, Orbitrap, and the FT-ICR, to analyze, under native instrument and buffer conditions, the seven-transmembrane helical protein bacteriorhodopsin–octylglucoside micelle and the empty nanodisc (MSP1D1-Nd) using both MS and tandem-MS modes of operation. Bacteriorhodopsin can be released from the octylglucoside-micelle efficiently on all three instruments (MS-mode), producing a narrow charge state distribution (z = 8+ to 10+) by either increasing the source lens or collision cell (or HCD) voltages. A lower center-of-mass collision energy (0.20–0.41 eV) is required for optimal bacteriorhodopsin liberation on the FT-ICR, in comparison to the Q-ToF and Orbitrap instruments (0.29–2.47 eV). The empty MSP1D1-Nd can be measured with relative ease on all three instruments, resulting in a highly complex spectrum of overlapping, polydisperse charge states. There is a measurable difference in MSP1D1-Nd charge state distribution (z = 15+ to 26+), average molecular weight (141.7 to 169.6 kDa), and phospholipid incorporation number (143 to 184) under low activation conditions. Utilizing tandem-MS, bacteriorhodopsin can be effectively liberated from the octylglucoside-micelle by collisional (Q-ToF and FT-ICR) or continuous IRMPD activation (FT-ICR). MSP1D1-Nd spectral complexity can also be significantly reduced by tandem-MS (Q-ToF and FT-ICR) followed by mild collisional or continuous IRMPD activation, resulting in a spectrum in which the charge state and phospholipid incorporation levels can easily be determined." @default.
- W2551701542 created "2016-11-30" @default.
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- W2551701542 date "2016-12-01" @default.
- W2551701542 modified "2023-10-13" @default.
- W2551701542 title "Native MS Analysis of Bacteriorhodopsin and an Empty Nanodisc by Orthogonal Acceleration Time-of-Flight, Orbitrap and Ion Cyclotron Resonance" @default.
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- W2551701542 doi "https://doi.org/10.1021/acs.analchem.6b03762" @default.
- W2551701542 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5505737" @default.
- W2551701542 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28193065" @default.
- W2551701542 hasPublicationYear "2016" @default.
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