2frl
From Proteopedia
(New page: 200px<br /><applet load="2frl" size="350" color="white" frame="true" align="right" spinBox="true" caption="2frl" /> '''Solution structure of the helix II template ...) |
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==Overview== | ==Overview== | ||
| - | Telomere addition by telomerase requires an internal templating sequence | + | Telomere addition by telomerase requires an internal templating sequence located in the RNA subunit of telomerase. The correct boundary definition of this template sequence is essential for the proper addition of the nucleotide repeats. Incorporation of incorrect telomeric repeats onto the ends of chromosomes has been shown to induce chromosomal instability in ciliate, yeast and human cells. A 5' template boundary defining element (TBE) has been identified in human, yeast and ciliate telomerase RNAs. Here, we report the solution structure of the TBE element (helix II) from Tetrahymena thermophila telomerase RNA. Our results indicate that helix II and its capping pentaloop form a well-defined structure including unpaired, stacked adenine nucleotides in the stem and an unusual syn adenine nucleotide in the loop. A comparison of the T.thermophila helix II pentaloop with a pentaloop of the same sequence found in the 23S rRNA of the Haloarcula marismortui ribosome suggests possible RNA and/or protein interactions for the helix II loop within the Tetrahymena telomerase holoenzyme. |
==About this Structure== | ==About this Structure== | ||
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[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Feigon, J.]] | [[Category: Feigon, J.]] | ||
| - | [[Category: Finger, L | + | [[Category: Finger, L D.]] |
| - | [[Category: Richards, R | + | [[Category: Richards, R J.]] |
| - | [[Category: Theimer, C | + | [[Category: Theimer, C A.]] |
[[Category: pentaloop]] | [[Category: pentaloop]] | ||
[[Category: rna hairpin]] | [[Category: rna hairpin]] | ||
[[Category: syn adenine]] | [[Category: syn adenine]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:24:26 2008'' |
Revision as of 15:24, 21 February 2008
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Solution structure of the helix II template boundary element from Tetrahymena telomerase RNA
Overview
Telomere addition by telomerase requires an internal templating sequence located in the RNA subunit of telomerase. The correct boundary definition of this template sequence is essential for the proper addition of the nucleotide repeats. Incorporation of incorrect telomeric repeats onto the ends of chromosomes has been shown to induce chromosomal instability in ciliate, yeast and human cells. A 5' template boundary defining element (TBE) has been identified in human, yeast and ciliate telomerase RNAs. Here, we report the solution structure of the TBE element (helix II) from Tetrahymena thermophila telomerase RNA. Our results indicate that helix II and its capping pentaloop form a well-defined structure including unpaired, stacked adenine nucleotides in the stem and an unusual syn adenine nucleotide in the loop. A comparison of the T.thermophila helix II pentaloop with a pentaloop of the same sequence found in the 23S rRNA of the Haloarcula marismortui ribosome suggests possible RNA and/or protein interactions for the helix II loop within the Tetrahymena telomerase holoenzyme.
About this Structure
2FRL is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
Structure of the Tetrahymena thermophila telomerase RNA helix II template boundary element., Richards RJ, Theimer CA, Finger LD, Feigon J, Nucleic Acids Res. 2006 Feb 1;34(3):816-25. Print 2006. PMID:16452301
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