Frameshift mutations in the protein polyglutamine tract-binding protein 1 (PQBP1) are believed to cause X-linked mental retardation. Here, Mizuguchi et al.present the crystal structure of a C-terminal fragment of PQBP1 in complex with the spliceosomal protein U5–15kD, and show details of this interaction that can lead to mechanistic insights into the disease.
- Mineyuki Mizuguchi
- Takayuki Obita
- Hitoshi Okazawa
