Structural basis of polypyrimidine tract recognition by the essential splicing factor U2AF65.
Sickmier, E.A., Frato, K.E., Paranawithana, S., Shen, H., Green, M.R., Kielkopf, C.L.(2006) Mol Cell 23: 49-59
- PubMed: 16818232 
- DOI: 10.1016/j.molcel.2006.05.025
- Primary Citation of Related Structures:  
2G4B - PubMed Abstract: 
The essential pre-mRNA splicing factor, U2AF(65), guides the early stages of splice site choice by recognizing a polypyrimidine (Py) tract consensus sequence near the 3' splice site. Since Py tracts are relatively poorly conserved in higher eukaryotes, U2AF(65) is faced with the problem of specifying uridine-rich sequences, yet tolerating a variety of nucleotide substitutions found in natural Py tracts ...