Macromolecule Content

• Total Structure Weight: 14.98 kDa 
• Atom Count: 990 
• Residue Count: 47 
• Unique nucleic acid chains: 1

1YMO

Solution structure of the P2b-P3 pseudoknot from human telomerase RNA

• DOI: 10.2210/pdb1YMO/pdb
• NDB: 1YMO
• BMRB: 6477

• Classification: RNA
• Mutation(s): No 


• Deposited: 2005-01-21 Released: 2005-03-15 
• Deposition Author(s): Theimer, C.A., Blois, C.A., Feigon, J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy, no restraint violations, consistent with residual dipolar couplings 

Literature

Structure of the human telomerase RNA pseudoknot reveals conserved tertiary interactions essential for function

Theimer, C.A., Blois, C.A., Feigon, J.

(2005) Mol Cell 17: 671-682

• PubMed: 15749017 
• DOI: 10.1016/j.molcel.2005.01.017
• Primary Citation of Related Structures:  
  1YMO


• PubMed Abstract: 
  

Human telomerase contains a 451 nt RNA (hTR) and several proteins, including a specialized reverse transcriptase (hTERT). The 5' half of hTR comprises the pseudoknot (core) domain, which includes the RNA template for telomere synthesis and a highly conserved pseudoknot that is required for telomerase activity. The solution structure of this essential pseudoknot, presented here, reveals an extended triple helix surrounding the helical junction. The network of tertiary interactions explains the phylogenetic sequence conservation and existing human and mouse TR functional studies as well as mutations linked to disease. Thermodynamic stability, dimerization potential, and telomerase activity of mutant RNAs that alter the tertiary contacts were investigated. Telomerase activity is strongly correlated with tertiary structure stability, whereas there is no correlation with dimerization potential of the pseudoknot. These studies reveal that a conserved pseudoknot tertiary structure is required for telomerase activity.

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Related Citations: 

• Mutations linked to dyskeratosis congenita cause changes in the structural equilibrium in telomerase RNA
  Theimer, C.A., Finger, L.D., Trantirek, L., Feigon, J.
  (2003) Proc Natl Acad Sci U S A 100: 449

• YNMG tetraloop formation by a dyskeratosis congenita mutation in human telomerase RNA
  Theimer, C.A., Finger, L.D., Feigon, J.
  (2003) RNA 9: 1446

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, USA

Macromolecules

Entity ID: 1
Molecule	Chains	Length	Organism	Image
Telomerase RNA P2b-P3 pseudoknot	A	47	N/A

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy, no restraint violations, consistent with residual dipolar couplings 
• OLDERADO: 1YMO Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-01-21 
• Released Date: 2005-03-15 
Deposition Author(s): Theimer, C.A., Blois, C.A., Feigon, J.

Revision History 

• Version 1.0: 2005-03-15
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance