PMID:8844851

Citation	Kowalak, JA and Walsh, KA (1996) Beta-methylthio-aspartic acid: identification of a novel posttranslational modification in ribosomal protein S12 from Escherichia coli. Protein Sci. 5:1625-32
Abstract	Utilizing microscale chemical derivatization reactions and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, we have identified a novel posttranslational modification of aspartic acid, beta-methylthio-aspartic acid. The modified residue is located at position 88 in ribosomal protein S12 from Escherichia coli, a phylogenetically conserved protein that has been implicated in maintaining translational accuracy of the ribosome.
Links	PubMed PMC2143476 Online version:10.1002/pro.5560050816
Keywords	Aspartic Acid/chemistry; Aspartic Acid/metabolism; Chromatography, High Pressure Liquid; Escherichia coli/chemistry; Hydrolysis; Oxidation-Reduction; Peptide Fragments/analysis; Peptide Fragments/chemistry; Protein Processing, Post-Translational; Ribosomal Proteins/chemistry; Ribosomal Proteins/metabolism; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; Trypsin/metabolism
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