Download MendeleySolution structure of a substrate for the archaeal pre-tRNA splicing endonucleases: the bulge-helix-bulge motif.
Diener, J.L., Moore, P.B.(1998) Mol Cell 1: 883-894
- PubMed: 9660971
- Primary Citation of Related Structures:
1A9L, 2A9L - PubMed Abstract:
The structure of the bulge-helix-bulge motif that constitutes the intron/exon splice site in H. volcanii pre-tRNATrp has been determined by NMR spectroscopy. The conformations of the two 3 nt bulges, where the pre-tRNA is cleaved, are stabilized by stacking interactions between bulge nucleotides and bases in the adjacent Watson-Crick helices and by a network of backbone hydrogen bonds. Both bulges are presented on the same minor groove face of the central 4 bp helix, and the overall structure has approximate two-fold symmetry, which makes it well-suited for attack by archaeal splicing endonucleases, which are symmetric dimers.
Organizational Affiliation:
Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, USA.
