Group A trichothiodystrophy is caused by mutations in the p8 subunit of the TFIIH complex, involved in transcription and nucleotide-excision repair. Now the structure of the yeast ortholog of p8 in complex with a fragment of the yeast ortholog of p52 shows how p8 stabilizes p52 and thus the whole TFIIH complex.
- Denis E Kainov
- Marc Vitorino
- Jean-Marc Egly