1YMO

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


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 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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

  • DOI: 10.1016/j.molcel.2005.01.017
  • Also Cited By: 2K96

  • 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 c ...

    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.


    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.USA 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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
Telomerase RNA P2b-P3 pseudoknotA47N/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 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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