Summary
The 30S ribosomal protein S7 purified from E. coli MRE600 displaces specifically and stoichiometrically the endogenous K-S7 protein when it is added to a reconstitution system containing total K strain 30S protein and 16S RNA. The S7 proteins from the two strains have been shown to contain a group of common trypic peptides and to crossreact immunologically. Therefore, the 30S ribosomal protein S7 from E. coli K strain and MRE600 are functionally and structurally homologous despite differences in amino acid composition, molecular weight and electrophoretic mobility.
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Sun, TT., Traut, R.R. The functional and structural homology of ribosomal protein S7 of E. coli strains K and MRE600. Molec. gen. Genet. 122, 1–9 (1973). https://doi.org/10.1007/BF00337968
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DOI: https://doi.org/10.1007/BF00337968