Structural basis of pyrimidine specificity in the MS2 RNA hairpin-coat-protein complex.
Grahn, E., Moss, T., Helgstrand, C., Fridborg, K., Sundaram, M., Tars, K., Lago, H., Stonehouse, N.J., Davis, D.R., Stockley, P.G., Liljas, L.(2001) RNA 7: 1616-1627
- PubMed: 11720290 
- Primary Citation of Related Structures:  
2BU1, 2C4Q, 2C4Y, 2C4Z, 2C50, 2C51 - PubMed Abstract: 
We have determined the X-ray structures of six MS2 RNA hairpin-coat-protein complexes having five different substitutions at the hairpin loop base -5. This is a uracil in the wild-type hairpin and contacts the coat protein both by stacking on to a tyrosine side chain and by hydrogen bonding to an asparagine side chain ...