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Author

Kang, Sebyung
Protein Nanobio Lab
Research Interests
  • Protein engineering, Drug/diagnostics delivery nanoplatform, Protein-base vaccine delivery systems, Biosensor & imaging

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Synthesis of biotin-tagged chemical cross-linkers and their applications for mass spectrometry

Cited 23 times inthomson ciCited 21 times inthomson ci
Title
Synthesis of biotin-tagged chemical cross-linkers and their applications for mass spectrometry
Author
Kang, SebyungMou, LiyuanLanman, JasonVelu, SadanandanBrouillette, Wayne J.Prevelige, Peter E., Jr.
Keywords
HYDROGEN/DEUTERIUM EXCHANGE; PROTEIN COMPLEXES; COAT PROTEIN; SUBUNIT-E; LINKING; IDENTIFICATION; BACTERIOPHAGE-P22; STOICHIOMETRY; DOMAIN; SIGNAL
Issue Date
200906
Publisher
WILEY-BLACKWELL
Citation
RAPID COMMUNICATIONS IN MASS SPECTROMETRY, v.23, no.11, pp.1719 - 1726
Abstract
Chemical cross-linking combined with mass spectrometry (MS) has been used to elucidate protein structures and protein-protein interactions. However, heterogeneity of the samples and the relatively low abundance of cross-linked peptides make this approach challenging. As an effort to overcome this hurdle, we have synthesized lysine-reactive homobifunctional cross-linkers with the biotin in the middle of the linker and used them to enrich cross-linked peptides. The reaction of biotin-tagged cross-linkers with purified HIV-1 CA resulted in the formation of hanging and intramolecular crosslinks. The peptides modified with biotinylated cross-linkers were effectively enriched and recovered using a streptavidin-coated plate and MS-friendly buffers. The enrichment of modified peptides and removal of the dominantly unmodified peptides simplify mass spectra and their analyses. The combination of the high mass accuracy of Fourier transform ion cyclotron resonance (FT-ICR)MSand the tandem mass spectrometric (MS/MS) capability of the linear ion trap allows us to unambiguously identify the cross-linking sites and additional modification, such as oxidation.
URI
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DOI
http://dx.doi.org/10.1002/rcm.4066
ISSN
0951-4198
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