2QH2 image
Deposition Date 2007-06-29
Release Date 2007-09-25
Last Version Date 2024-05-01
Entry Detail
PDB ID:
2QH2
Keywords:
RNA
Title:
Solution structure of the CR7 terminal hairpin loop from human telomerase RNA
Biological Source:
Source Organism:
(Taxon ID: )
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
200
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy, no restraint violation, consistent with residual dipolar couplings
2QH2 validation report
Macromolecular Entities
Polymer Type:polyribonucleotide
Molecule:Human telomerase RNA CR7 terminal hairpin loop
Chain IDs:A
Chain Length:24
Number of Molecules:1
Biological Source:
Ligand Molecules
NA
Primary Citation
Structural and functional characterization of human telomerase RNA processing and cajal body localization signals.
Mol.Cell 27 869 881 (2007)
PMID: 17889661 DOI: 10.1016/j.molcel.2007.07.017

Abstact

The RNA component of human telomerase (hTR) includes H/ACA and CR7 domains required for 3' end processing, localization, and accumulation. The terminal loop of the CR7 domain contains the CAB box (ugAG) required for targeting of scaRNAs to Cajal bodies (CB) and an uncharacterized sequence required for accumulation and processing. To dissect out the contributions of the CR7 stem loop to hTR processing and localization, we solved the solution structures of the 3' terminal stem loops of hTR CR7 and U64 H/ACA snoRNA, and the 5' terminal stem loop of U85 C/D-H/ACA scaRNA. These structures, together with analysis of localization, processing, and accumulation of hTRs containing nucleotide substitutions in the CR7 domain, identified the sequence and structural requirements of the hTR processing and CB localization signals and showed that these signals are functionally independent. Further, 3' end processing was found to be a prerequisite for translocation of hTR to CBs.

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Primary Citation of related structures
2QH2