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This template is intended for use on nucleic acid structure pages. To insert use: {{DNA RNA structure}}. On the primary, secondary, tertiary and quaternary structure pages, it displays alternative versions of the image with the relevant section highlighted. Alternatively, for the non-interactive image, use [[File:DNA RNA structure (full).png]]
An example of RNA secondary structure. This image includes several structural elements, including; single-stranded and double-stranded areas, bulges, internal loops and hairpin loops. Double-stranded RNA forms an A-type helical structure, unlike the common B-type conformation taken by double-stranded DNA molecules.
The article circulated to the members of the RNA Tie Club in January 1955 as "On Degenerate Templates and the Adaptor Hypothesis: A Note for the RNA Tie Club" is described as "one of the most important unpublished articles in the history of science", [25] [26] and "the most famous unpublished paper in the annals of molecular biology." [27]
Two important functions are the binding potential with ligands or proteins, and its ability to stabilize the whole tertiary structure of DNA or RNA. The strong structure can inhibit or modulate transcription and replication, such as in the telomeres of chromosomes and the UTR of mRNA. [18] The base identity is important towards ligand binding.
Frequently the primary structure encodes motifs that are of functional importance. Some examples of sequence motifs are: the C/D [12] and H/ACA boxes [13] of snoRNAs, Sm binding site found in spliceosomal RNAs such as U1, U2, U4, U5, U6, U12 and U3, the Shine-Dalgarno sequence, [14] the Kozak consensus sequence [15] and the RNA polymerase III ...
For example, the RNA component of the human telomerase contains a pseudoknot that is critical for its activity. [7] The hepatitis delta virus ribozyme is a well known example of a catalytic RNA with a pseudoknot in its active site. [10] [11] Though DNA can also form pseudoknots, they are generally not present in standard physiological conditions.
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