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© Research
Publication : The Journal of biological chemistry

Peptide environment of the peptidyl transferase center from Escherichia coli 70 S ribosomes as determined by thermoaffinity labeling with dihydrospiramycin

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of biological chemistry - 29 Sep 1995

Bischof O, Urlaub H, Kruft V, Wittmann-Liebold B

Link to Pubmed [PMID] – 7559446

J. Biol. Chem. 1995 Sep;270(39):23060-4

In an attempt to gain information about the peptidyl transferase center at the peptide level we cross-linked the spiramycin derivative dihydrospiramycin to its functional binding site in the 70 S ribosome of Escherichia coli. In this manner ribosomal proteins S12, S14, L17, L18, L27 and L35 were found specifically affinity-labeled. Proteolytic fragmentation of these proteins, separation by C18 reversed-phase high performance liquid chromatography of the peptide mixtures, and subsequent sequence analysis of labeled peptides revealed peptide regions at positions Ala1-Lys9 and Tyr116-Lys119 of S12, Leu47-Asp53 of protein S14, Ser6-Lys35 of protein L17, Ala57-Lys63 of protein L18, Ala5-Lys18 and Val66-Lys71 of protein L27, and Thr5-Lys11 of protein L35. This approach is a valuable tool to characterize the binding site of spiramycin as well as the peptidyl transferase center at the molecular level.

http://www.ncbi.nlm.nih.gov/pubmed/7559446