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- W2063896210 abstract "Addition of 1.0 mM LaCl(3) to aqueous ammonium acetate solutions containing proteins in their folded native forms can result in a significant increase in the molecular ion charging obtained with electrospray ionization as a result of cation adduction. In combination with m-nitrobenzyl alcohol, molecular ion charge states that are greater than the number of basic sites in the protein can be produced from these native solutions, even for lysozyme, which is conformationally constrained by four intramolecular disulfide bonds. Circular dichroism spectroscopy indicates that the conformation of ubiquitin is not measurably affected with up to 1.0 M LaCl(3), but ion mobility data indicate that the high charge states that are formed when 1.0 mM LaCl(3) is present are more unfolded than the low charge states formed without this reagent. These and other results indicate that the increased charging is a result of La(3+) preferentially adducting onto compact or more native-like conformers during ESI and the gas-phase ions subsequently unfolding as a result of increased Coulomb repulsion. Electron capture dissociation of these high charge-state ions formed from these native solutions results in comparable sequence coverage to that obtained for ions formed from denaturing solutions without supercharging reagents, making this method a potentially powerful tool for obtaining structural information in native mass spectrometry." @default.
- W2063896210 created "2016-06-24" @default.
- W2063896210 creator A5014296444 @default.
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- W2063896210 date "2012-09-05" @default.
- W2063896210 modified "2023-09-27" @default.
- W2063896210 title "Supercharging with Trivalent Metal Ions in Native Mass Spectrometry" @default.
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- W2063896210 doi "https://doi.org/10.1007/s13361-012-0463-2" @default.
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