1K6H

Solution Structure of Conserved AGNN Tetraloops: Insights into Rnt1p RNA processing

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.3 of the entry. See complete history. 


Literature

Solution structure of conserved AGNN tetraloops: insights into Rnt1p RNA processing.

Lebars, I., Lamontagne, B., Yoshizawa, S., Aboul-Elela, S., Fourmy, D.

(2001) EMBO J 20: 7250-7258

  • DOI: 10.1093/emboj/20.24.7250
  • Primary Citation of Related Structures:  
    1K6G, 1K6H

  • PubMed Abstract: 

    • Rnt1p, the yeast orthologue of RNase III, cleaves rRNAs, snRNAs and snoRNAs at a stem capped with conserved AGNN tetraloop. Here we show that 9 bp long stems ending with AGAA or AGUC tetraloops bind to Rnt1p and direct specific but sequence-independent RNA cleavage when provided with stems longer than 13 bp ...

    Rnt1p, the yeast orthologue of RNase III, cleaves rRNAs, snRNAs and snoRNAs at a stem capped with conserved AGNN tetraloop. Here we show that 9 bp long stems ending with AGAA or AGUC tetraloops bind to Rnt1p and direct specific but sequence-independent RNA cleavage when provided with stems longer than 13 bp. The solution structures of these two tetraloops reveal a common fold for the terminal loop stabilized by non-canonical A-A or A-C pairs and extensive base stacking. The conserved nucleotides are stacked at the 5' side of the loop, exposing their Watson-Crick and Hoogsteen faces for recognition by Rnt1p. These results indicate that yeast RNase III recognizes the fold of a conserved single-stranded tetraloop to direct specific dsRNA cleavage.

    Organizational Affiliation: 

    Laboratoire de RMN, ICSN-CNRS, 1 ave de la terrasse, F-91190 Gif-sur-Yvette, France.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
RNA (5'-R(P*GP*GP*CP*GP*UP*GP*UP*UP*CP*AP*GP*AP*AP*GP*AP*AP*CP*GP*CP*GP*CP*C)-3')A 22N/A
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1K6H Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-12-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations