Title
ETD allows for native surface mapping of a 150 kDa noncovalent complex on a commercial Q-TWIMS-TOF instrument ETD allows for native surface mapping of a 150 kDa noncovalent complex on a commercial Q-TWIMS-TOF instrument
Author
Faculty/Department
Faculty of Sciences. Biology
Faculty of Sciences. Chemistry
Publication type
article
Publication
New York, N.Y. ,
Subject
Chemistry
Biology
Source (journal)
Journal of the American Society for Mass Spectrometry. - New York, N.Y.
Volume/pages
25(2014) :3 , p. 343-350
ISSN
1044-0305
1044-0305
ISI
000330831900006
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Top-down approaches for the characterization of intact proteins and macromolecular complexes are becoming increasingly popular, since they potentially simplify and speed up the assignment process. Here we demonstrate how, on a commercially available Q-TWIMS-TOF instrument, we performed top-down ETD of the native form of tetrameric alcohol dehydrogenase. We achieved good sequence coverage throughout the first 81 N-terminal amino acids of ADH, with the exception of a loop located on the inside of the protein. This is in agreement with the exposed parts of the natively folded protein according to the crystal structure. Choosing the right precursor charge state and applying supplemental activation were found to be key to obtaining a high ETD fragmentation efficiency. Finally, we briefly discuss opportunities to further increase the performance of ETD based on our results.
E-info
https://repository.uantwerpen.be/docman/iruaauth/71605f/7897159.pdf
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