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  • Title: Further evidence for the participation of proteins S 3, S 14 and S 19 in tRNA binding to E. coli 30 S subunits.
    Author: Shimizu M, Craven GR.
    Journal: Mol Biol Rep; 1976 Nov; 3(2):105-11. PubMed ID: 796684.
    Abstract:
    Previous studies have shown that iodination of 30 S subunits causes inactivation for both enzymatic fMet-tRNA and non-enzymatic phe-tRNA binding activities. This inactivation was shown to be due to the modification of three to five ribosomal proteins [1]. In this report the role of these proteins in tRNA binding activity has been further studied. Purified ribosomal proteins, isolated from modified subunits, are re-assembled into otherwise unmodified 30 S ribosomes and assayed for tRNA binding capacity. The presence of modified S 3, S 14 and S 19 (S 15) in the reconstituted particle results in substantial reduction of both fMet-tRNA and phe-tRNA binding activities. This reduction in tRNA binding activity does not appear to be due to an assembly defect.
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