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A tertiary interaction that links active-site domains to the 5′ splice site of a group II intron

Author

Listed:
  • Marc Boudvillain

    (Department of Biochemistry and Molecular Biophysics
    Howard Hughes Medical Institute, Columbia University
    CNRS, Rue Charles Sadron)

  • Alexandre de Lencastre

    (Department of Biochemistry and Molecular Biophysics)

  • Anna Marie Pyle

    (Department of Biochemistry and Molecular Biophysics
    Howard Hughes Medical Institute, Columbia University)

Abstract

Group II introns are self-splicing RNAs that are commonly found in the genes of plants, fungi, yeast and bacteria1,2. Little is known about the tertiary structure of group II introns, which are among the largest natural ribozymes. The most conserved region of the intron is domain 5 (D5), which, together with domain 1 (D1), is required for all reactions catalysed by the intron3. Despite the importance of D5, its spatial relationship and tertiary contacts to other active-site constituents have remained obscure. Furthermore, D5 has never been placed directly at a site of catalysis by the intron. Here we show that a set of tertiary interactions (λ–λ′) links catalytically essential regions of D5 and D1, creating the framework for an active-site and anchoring it at the 5′ splice site. Highly conserved elements similar to components of the λ–λ′ interaction are found in the eukaryotic spliceosome.

Suggested Citation

  • Marc Boudvillain & Alexandre de Lencastre & Anna Marie Pyle, 2000. "A tertiary interaction that links active-site domains to the 5′ splice site of a group II intron," Nature, Nature, vol. 406(6793), pages 315-318, July.
    • Handle: RePEc:nat:nature:v:406:y:2000:i:6793:d:10.1038_35018589
    DOI: 10.1038/35018589
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