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Dual functions of DNA repair genes: molecular, cellular, and clinical implications

✍ Scribed by A.R. Lehmann

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 270 KB
Volume: 20
Category: Article
ISSN: 0265-9247
DOI: 10.1002/(sici)1521-1878(199802)20:2<146::aid-bies7>3.0.co;2-r

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✦ Synopsis

The complex series of DNA repair pathways that are used to repair damage to cellular DNA employ many different proteins. A substantial number of these have second functions. Defects in these multifunctional proteins in man can lead to widely differing clinical phenotypes depending on which of the functions is affected. This is illustrated most clearly in the transcription factor TFIIH, which is involved in both basal transcription and nucleotide excision repair. Different mutations in genes encoding TFIIH subunits can result in the highly cancer-prone repair disorder xeroderma pigmentosum, or the noncancer-prone multisystem disorder trichothiodystrophy, the features of which are probably a consequence of abnormalities in transcription. The involvement of repair proteins in other processes also poses interesting evolutionary questions.

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