Primary and secondary structure of 7-3 (K) RNA of Novikoff hepatoma
- PMID: 6434539
Primary and secondary structure of 7-3 (K) RNA of Novikoff hepatoma
Abstract
7-3 RNA (also known as K-RNA and 7SK-RNA) is a distinct small RNA found in insect to mammalian cells. Previous studies showed that this RNA is not capped, contains no modified nucleotides, is conserved through evolution, is synthesized by RNA polymerase III, and, in part, is associated by polyribosomes. In this study, the complete nucleotide sequence of 7-3 RNA was determined by RNA-sequencing methods, and the sequence is compared with several small RNAs and repetitive DNA sequences for homology. This 330-nucleotide-long RNA contained pppGp as its 5' terminus and exhibited heterogeneity with respect to the 3'-terminal AoH. The nucleotide sequence is: (sequence in text) The RNA is G-C rich, and evidence is presented that 7-3 RNA is in a ribonucleoprotein particle in the cytoplasm.
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