Open AccessThe nucleotide sequence at the 3′-end ofNeurospora crassa18S-rRNA and studies on the interaction with 5S-rRNA
Author(s) -
John M. Kelly,
Robert A. Cox
Publication year - 1982
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/10.21.6733
Subject(s) - 18s ribosomal rna , biology , ribosomal rna , neurospora crassa , ribosome , genetics , 23s ribosomal rna , nucleotide , 5.8s ribosomal rna , internal transcribed spacer , base pair , rna , gene , mutant
The sequence of more than 100 nucleotides at the 3'-end of Neurospora crassa 18S-rRNA was determined by chemical sequencing techniques. Extensive homologies with 18S-rRNA from other eukaryotes were found. Inspection of the nucleotide sequence at the 3'-end of N. crassa 5S-rRNA revealed the presence of sequences complementary to a region near the 3'-terminus of 18S-rRNA. Under the appropriate conditions a complex was formed between 18S-rRNA and 5S-rRNA (Tm 53 degrees C). Interaction was detected between 5S-rRNA and a specific 3'-terminal fragment from 18S-rRNA and between 18S-rRNA and a specific 3'-terminal fragment from 5S-rRNA. These findings are consistent with the idea that intermolecular base-pairing between nucleotides at the 3'-ends of 18S-rRNA and 5S-rRNA may be functionally important within the ribosome. Further investigation revealed that this intermolecular base-pairing is not essential for ribosome stability.