Journal
TRENDS IN CELL BIOLOGY
Volume 11, Issue 2, Pages 60-65Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/S0962-8924(00)01877-8
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DNA helicases are required for DNA replication, recombination and repair. Despite a common enzymatic function - the ability to unwind duplex DNA most helicases share only limited amino acid sequence similarity. Helicases that have significant sequence similarity define a subfamily. It remains unclear, however, how this sequence similarity relates to helicase function. The Saccharomyces cerevisiae Pif1p helicase is the prototype member of a helicase subfamily that is conserved from yeasts to humans. As the two Pif1p subfamily members studied to date affect the same DNA sequences, the amino acid similarity that defines this subfamily might reflect common substrates.
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