Isopeptide linkage between N-alpha-monomethylalanine and lysine in ribosomal protein S11 from Escherichia coli.
- 1 November 1977
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 74 (11), 4905-4908
- https://doi.org/10.1073/pnas.74.11.4905
Abstract
Protein S11 from the E. coli ribosome has a unique NH2-terminal structure not previously observed among ribosomal proteins. Owing to the formation of an isopeptide bond between a secondary amino acid (N-.alpha.-monomethylalanine) and the .epsilon.-amino group of the NH2-terminal lysine residue, a branching point is formed. Threfore, 2 amino acids are seen when the NH2 terminus of the protein is determined.Keywords
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