title: Cooperative control of translational fidelity by ribosomal proteins in Escherichia coli. III. A ram mutation in the structural gene for protein S5 (rpx E).
abstract: The effect on translational fidelity of a particular mutation in the gene coding for protein S5(rpxE) has been investigated. This mutation has the opposite effect of a restrictive strA mutation; in vivo, it relieves the restriction imposed by strA on the suppression of T4 nonsense mutants and results in hypersensitivity to streptomycin; in vitro, the presence of the altered S5 protein in 30S ribosomes results in increased intrinsic misreading. It is concluded that this mutation, ramC319, acts as a ribosomal ambiguity mutation similar to certain mutations of protein S4 (ramA).
mesh_terms: D001426:Bacterial Proteins / Q000096:biosynthesis*; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects / Q000378:metabolism*; D005796:Genes; D009154:Mutation; D010641:Phenotype; D014176:Protein Biosynthesis; D012269:Ribosomal Proteins / Q000096:biosynthesis*; D013307:Streptomycin / Q000494:pharmacology
chemical_list: D001426:Bacterial Proteins; D012269:Ribosomal Proteins; D013307:Streptomycin