Crystal structure of a model branchpoint-U2 snRNA duplex containing bulged adenosines.
Berglund, J.A., Rosbash, M., Schultz, S.C.(2001) RNA 7: 682-691
- PubMed: 11350032 
- DOI: 10.1017/s1355838201002187
- Primary Citation of Related Structures:  
1I9X - PubMed Abstract: 
Bulged nucleotides play a variety of important roles in RNA structure and function, frequently forming tertiary interactions and sometimes even participating in RNA catalysis. In pre-mRNA splicing, the U2 snRNA base pairs with the intron branchpoint sequence (BPS) to form a short RNA duplex that contains a bulged adenosine that ultimately serves as the nucleophile that attacks the 5' splice site ...