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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Characterization of ATPase activity of recombinant human pif1.

Saccharomyces cerevisiae Pif1p helicase is the founding member of the Pif1 subfamily that is conserved from yeast to human. The potential human homolog of the yeast PIF1 gene has been cloned from the cDNA library of the Hek293 cell line. Here, we described a purification procedure of glutathione S-transferase (GST)-fused N terminal truncated human Pif1 protein (hPif1DN) from yeast and characterized the enzymatic kinetics of its ATP hydrolysis activity. The ATPase activity of human Pif1 is dependent on divalent cation, such as Mg2+, Ca2+ and single-stranded DNA. Km for ATP for the ATPase activity is approximately 200 mM. As the ATPase activity is essential for hPif1's helicase activity, these results will facilitate the further investigation on hPif1.[1]

References

  1. Characterization of ATPase activity of recombinant human pif1. Huang, Y., Zhang, D.H., Zhou, J.Q. Acta Biochim. Biophys. Sin. (Shanghai) (2006) [Pubmed]
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