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Related Experiment Videos

Sequence and structural conservation in RNA ribose zippers.

Makio Tamura1, Stephen R Holbrook

  • 1Lawrence Berkeley National Laboratory, Structural Biology Department, Physical Biosciences Division, 1 Cyclotron Road, 132 Melvin Calvin Lab, Bldg 3, Berkeley, CA 94720, USA.

Journal of Molecular Biology
|July 5, 2002
PubMed
Summary

This study identified 97 ribose zippers, crucial RNA tertiary structure elements, in ribosomal RNAs. These zippers, stabilized by proteins and conserved sequences, are vital for RNA structure prediction and molecular design.

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Area of Science:

  • Molecular Biology
  • Structural Biology
  • Biochemistry

Background:

  • The ribose zipper is a key RNA tertiary structure element involving hydrogen bonds between ribose 2'-hydroxyls.
  • These interactions can also involve base-backbone and base-base contacts, such as A-minor motifs.

Purpose of the Study:

  • To identify and analyze ribose zipper tertiary interactions in ribosomal RNAs from different organisms.
  • To investigate the sequence conservation, structural stability, and phylogenetic relevance of these interactions.

Main Methods:

  • Crystal structure analysis of large ribosomal subunit RNAs (Haloarcula marismortui, Deinococcus radiodurans) and small ribosomal subunit RNA (Thermus thermophilus).
  • Identification and classification of ribose zippers based on interaction types and location within secondary structure.

Related Experiment Videos

  • Analysis of sequence conservation across ribosomal RNAs and prokaryotic sequences.

    • Main Results:

    • A total of 97 ribose zippers were identified across the studied ribosomal RNAs.
    • Seven distinct types of ribose zippers were observed, with the canonical type being most common.
    • Ribose zippers predominantly link stem/stem-like segments with loop regions and are often stabilized by ribosomal proteins.
    • Strong sequence and structural conservation was observed, linked to stacked base triples (A-minor motifs).

    Conclusions:

    • Ribose zippers are conserved structural elements in ribosomal RNAs, stabilized by proteins and specific base-pairing interactions.
    • The identified types and conservation patterns of ribose zippers offer valuable insights for RNA tertiary structure prediction.
    • These findings have potential applications in molecular modeling and the rational design of RNA structures.