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Adaptive recognition in RNA complexes with peptides and protein modules.

D J Patel1

  • 1Cellular Biochemistry and Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. pateld@mskcc.org

Current Opinion in Structural Biology
|February 27, 1999
PubMed
Summary

Researchers characterized novel RNA-bound arginine-rich peptide structures and their binding pockets in viral systems. Peptides adopt alpha-helical or beta-hairpin folds, interacting with RNA through various contacts, revealing diverse recognition strategies.

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Area of Science:

  • Structural biology
  • Molecular biology
  • Biochemistry

Background:

  • Recent advances in characterizing RNA-bound arginine-rich peptides and their binding pockets in viral and phage systems.
  • Studies focus on minimalist modular domains undergoing adaptive structural transitions upon complex formation.

Purpose of the Study:

  • To structurally characterize novel folds of RNA-bound arginine-rich peptides.
  • To elucidate the architecture of peptide-binding RNA pockets in viral and phage systems.
  • To understand the principles, patterns, and diversity of adaptive transitions in RNA recognition.

Main Methods:

  • Structural characterization of peptide-RNA complexes.
  • Analysis of minimalist modular domains and their adaptive structural transitions.

Related Experiment Videos

  • Investigating RNA tertiary fold-generated binding pockets and protein secondary structure interactions.

    • Main Results:

    • RNA-bound peptides adopt isolated alpha-helical or beta-hairpin folds within the RNA major groove.
    • RNA binding pockets are sculpted by mismatches, triples, and looped-out bases, accommodating sidechains via hydrophobic, hydrogen bonding, and ionic contacts.
    • Alternative strategies observed in HIV-1 nucleocapsid and MS2 phage coat proteins involve base residue insertion into protein surface pockets.

    Conclusions:

    • Peptide-RNA recognition involves adaptive structural transitions where RNA pockets envelop protein secondary structures.
    • RNA binding pockets are precisely engineered through specific base modifications to interact with amino acid sidechains.
    • Distinct recognition strategies exist at peptide and protein module levels, offering insights into RNA recognition diversity.