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. 1982 Nov 11;10(21):6733–6745. doi: 10.1093/nar/10.21.6733

The nucleotide sequence at the 3'-end of Neurospora crassa 18S-rRNA and studies on the interaction with 5S-rRNA.

J M Kelly, R A Cox
PMCID: PMC326960  PMID: 6217449

Abstract

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.

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Selected References

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