Open AccessProtein binding sites onEscherichia coli16S RNA; RNA regions that are protected by proteins S7, S14 and S19 in the presence or absence of protein S9
Author(s) -
Laura Wiener,
Richard Brimacombe
Publication year - 1987
Publication title -
nucleic acids research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 9.008
H-Index - 537
eISSN - 1362-4954
pISSN - 0305-1048
DOI - 10.1093/nar/15.9.3653
Subject(s) - biology , rna , temperature gradient gel electrophoresis , ribosomal protein , microbiology and biotechnology , ribonuclease , 16s ribosomal rna , ribosomal rna , gel electrophoresis , protein subunit , biochemistry , escherichia coli , 30s , ribosome , gene
14C-labelled proteins from E. coli 30S ribosomal subunits were isolated by HPLC, and selected groups of these proteins were reconstituted with 32P-labelled 16S RNA. The isolated reconstituted particles were partially digested with ribonuclease A, and the RNA fragments protected by the proteins were separated by gel electrophoresis and subjected to sequence analysis. Protein S7 alone gave no protected fragments, but S7 together with S14 and S19 protected an RNA region comprising the sequences 936-965, 972-1030, 1208-1262 and 1285-1379 of the 16S RNA. Addition of increasing amounts of protein S9 to the S7/S14/S19 particle resulted in a parallel increase in the protection of the hairpin loop between bases 1262 and 1285. The results are discussed in terms of the three-dimensional folding of 16S RNA in the 30S subunit.