Abstract
We report a new strategy for the parallel identification of O-GlcNAc-glycosylated proteins from cell lysates. The approach permits specific proteins of interest to be rapidly interrogated for the modification in any tissue or cell type and can be extended to peptides to facilitate the mapping of glycosylation sites. As an illustration of the approach, we identified four new O-GlcNAc-glycosylated proteins of low cellular abundance (c-Fos, c-Jun, ATF-1, and CBP) and two short regions of glycosylation in the enzyme O-GlcNAc transferase (OGT). The ability to target specific proteins across various tissue or cell types complements emerging proteomic technologies and should advance our understanding of this important posttranslational modification.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, Non-P.H.S.
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Acetylglucosamine / chemistry
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Acetylglucosamine / metabolism*
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Activating Transcription Factor 1
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Amino Acid Sequence
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CREB-Binding Protein
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DNA-Binding Proteins / chemistry
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DNA-Binding Proteins / metabolism
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Glycosylation
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HeLa Cells
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Humans
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Mass Spectrometry
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Molecular Sequence Data
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N-Acetylglucosaminyltransferases / chemistry
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N-Acetylglucosaminyltransferases / metabolism
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Nuclear Proteins / chemistry
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Nuclear Proteins / metabolism
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Proto-Oncogene Proteins c-fos / chemistry
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Proto-Oncogene Proteins c-fos / metabolism
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Proto-Oncogene Proteins c-jun / chemistry
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Proto-Oncogene Proteins c-jun / metabolism
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Trans-Activators / chemistry
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Trans-Activators / metabolism
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Transcription Factors / chemistry
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Transcription Factors / metabolism*
Substances
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Activating Transcription Factor 1
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DNA-Binding Proteins
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Nuclear Proteins
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Proto-Oncogene Proteins c-fos
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Proto-Oncogene Proteins c-jun
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Trans-Activators
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Transcription Factors
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CREB-Binding Protein
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CREBBP protein, human
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N-Acetylglucosaminyltransferases
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O-GlcNAc transferase
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Acetylglucosamine