title: Basepairing of oligonucleotides to the 3' end of 16S ribosomal RNA is not stabilized by ribosomal proteins.
abstract: We have studied the binding of the octanucleotide (5'-3')d(AAGGAGGT) which is fully complementary to the 3' end of 16S ribosomal RNA, to ribosomes and to the isolated target sequence (5'-3') (ACCUCCUUA). The binding constant for 30S or 70S ribosomes is (5 +/- 2) X 10(7) mol-1, whereas the duplex containing the octa- and the nonanucleotide has an association constant of (6 +/- 3) X 10(7) mol-1. The two values are the same within the experimental error. This result suggests that basepairing at the 3' end of 16S rRNA is not stabilized by ribosomal proteins.
mesh_terms: D001482:Base Composition; D001483:Base Sequence; D002942:Circular Dichroism; D007700:Kinetics; D008970:Molecular Weight; D009690:Nucleic Acid Conformation; D009841:Oligonucleotides / Q000378:metabolism*; D009843:Oligoribonucleotides / Q000378:metabolism*; D011485:Protein Binding; D012335:RNA, Ribosomal / Q000378:metabolism*; D012269:Ribosomal Proteins / Q000378:metabolism*; D012270:Ribosomes / Q000378:metabolism; D013816:Thermodynamics
chemical_list: D009841:Oligonucleotides; D009843:Oligoribonucleotides; D012335:RNA, Ribosomal; D012269:Ribosomal Proteins