Download MendeleySolution Structure and Self-association Properties of the p8 TFIIH Subunit Responsible for Trichothiodystrophy
Vitorino, M., Coin, F., Zlobinskaya, O., Atkinson, R.A., Moras, D., Egly, J.M., Poterszman, A., Kieffer, B.(2007) J Mol Biol 368: 473-480
- PubMed: 17350038
- DOI: https://doi.org/10.1016/j.jmb.2007.02.020
- Primary Citation of Related Structures:
2JNJ - PubMed Abstract:
Trichothiodystrophy (TTD) is a rare hereditary multi-system disorder associated with defects in nucleotide excision repair (NER) and transcription as consequences of mutations in XPB, XPD and p8/TTD-A subunits of transcription factor IIH (TFIIH). Here, we report the solution structure of the p8/TTD-A protein, a small alpha/beta protein built around an antiparallel beta-sheet that forms a homodimer with an extended interface. In order to characterize the dimer interface, we have introduced a mutation at position 44, which destabilizes the dimeric form of the protein. We have shown that this mutation has no effect on the intrinsic ability of p8/TTD-A to stimulate NER in vitro, but affects the capacity of p8/TTD-A to restore TFIIH concentration in TTD-A fibroblasts. Point mutations found in TTD-A patients are discussed on the basis of the present structure.
Organizational Affiliation:
Institut de Génétique et de Biologie Moléculaire et Cellulaire, UMR 7104, 1 rue Laurent Fries, BP 10142, 67404 Illkirch Cedex, France.
