Crystal Structure of TB-RBP, a Novel RNA-binding and Regulating Protein
Pascal, J.M., Hart, P.J., Hecht, N.B., Robertus, J.D.(2002) J Mol Biol 319: 1049-1057
- PubMed: 12079346
- DOI: https://doi.org/10.1016/S0022-2836(02)00364-9
- Primary Citation of Related Structures:
1KEY - PubMed Abstract:
The testis/brain-RNA-binding protein (TB-RBP) spatially and temporally controls the expression of specific mRNAs in developing male germ cells and brain cells, and is implicated in DNA recombination and repair events. We report the 2.65 A crystal structure of mouse TB-RBP. The structure is predominantly alpha-helical and exhibits a novel protein fold and mode of assembly. Crystal symmetry and molecular symmetry combine to form an octet of TB-RBP monomers in the shape of an elongated spherical particle with a large cavity at its center. Amino acid residues that affect RNA and DNA binding are located on the interior surface of the assembled particle, and a putative nucleotide-binding domain that controls RNA binding is located at a dimer interface. Other modes of assembly are suggested for TB-RBP based on our structure and recently reported electron microscopic reconstructions of human TB-RBP.
Organizational Affiliation:
Institute for Cellular and Molecular Biology and the Department of Chemistry and Biochemistry, University of Texas at Austin, 78712, USA.