Download MendeleySolution structure of the R3H domain from human Smubp-2
Liepinsh, E., Leonchiks, A., Sharipo, A., Guignard, L., Otting, G.(2003) J Mol Biol 326: 217-223
- PubMed: 12547203
- DOI: https://doi.org/10.1016/s0022-2836(02)01381-5
- Primary Citation of Related Structures:
1MSZ - PubMed Abstract:
The R3H domain is a conserved sequence motif, identified in over 100 proteins, that is thought to be involved in polynucleotide-binding, including DNA, RNA and single-stranded DNA. In this work the 3D structure of the R3H domain from human Smubp-2 was determined by NMR spectroscopy. It is the first 3D structure determination of an R3H domain. The fold presents a small motif, consisting of a three-stranded antiparallel beta-sheet and two alpha-helices, which is related to the structures of the YhhP protein and the C-terminal domain of the translational initiation factor IF3. The similarities are non-trivial, as the amino acid identities are below 10%. Three conserved basic residues cluster on the same face of the R3H domain and could play a role in nucleic acid recognition. An extended hydrophobic area at a different site of the molecular surface could act as a protein-binding site. A strong correlation between conservation of hydrophobic amino acids and side-chain solvent protection indicates that the structure of the Smubp-2 R3H domain is representative of R3H domains in general.
Organizational Affiliation:
Department of Medical Biochemistry and Biophysics, Karolinska Institute, S-17177, Stockholm, Sweden
