The primary structure of purified SV-IV, a major secretory protein synthesized by the rat seminal vesicle (SV) epithelium, was analysed by electrospray mass spectrometry (ES-MS). The protein was found to be highly heterogeneous. The various components were separated and identified by reversed phase
Analysis of post-translational modification and characterization of the domain structure of dynamin A from Dictyostelium discoideum
✍ Scribed by Andreas Schlosser; Boris Klockow; Dietmar J. Manstein; Wolf D. Lehmann
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 284 KB
- Volume
- 38
- Category
- Article
- ISSN
- 1076-5174
- DOI
- 10.1002/jms.438
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✦ Synopsis
Abstract
The post‐translational modifications of the 96 kDa protein dynamin A from Dictyostelium discoideum were analyzed using Q‐TOF mass spectrometry. The accurate molecular mass of the intact protein revealed a covalent modification causing an additional mass of 42 Da. The modification could be identified as N‐terminal acetylation by tandem mass spectrometry. Extracted ion chromatograms for the a~1~ and b~1~ ion of the tryptic T1 peptide were used to detect the acetylated peptide within 54 nanoelectrospray ionization tandem mass spectra. Owing to the accurate molecular mass of the intact protein, additional covalent modifications could be excluded. In addition to the covalent modification, the domain structure of dynamin A was determined by applying a combination of limited proteolysis, sodium dodecylsulfate polyacrylamide gel electrophoresis, automated tandem mass spectrometry and protein database searching. Copyright © 2003 John Wiley & Sons, Ltd.
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