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EXO1 (Exonuclease 1)

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Encyclopedia of Signaling Molecules

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Synonyms

EXO1; Exonuclease 1; HEX1; hEXO1

Historical Background

Exonuclease 1 (EXO1) was first identified in Schizosaccharomyces pombe (Szankasi and Smith 1995) and belongs to the Rad2/XPG family, which is conserved in its nuclease domain through species (Szankasi and Smith 1995; Wilson et al. 1998). The nuclease domain is located at the NH2-terminus and contains two subdomains the N-domain (N) and the internal (I) domain separated by a spacer region (Fig. 1). The EXO1 gene product exerts a 5′ → 3′ exonuclease and 5′ flap endonuclease activity (Lee and Wilson 1999; Keijzers et al. 2015). In addition, the EXO1 protein exhibits 5′ → 3′ intrinsic RNase H activity (Qiu et al. 1999). EXO1 has high affinity for processing double stranded DNA breaks (DSB), nicks, gaps, and pseudo-Y structures and can resolve double Holliday junctions. EXO1 is expressed at low level, independently of the cell cycle progression or proliferative status of the human cell (El-Shemerly et al. 2005). However, in...

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References

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Authors and Affiliations

  1. Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark

    Lene Juel Rasmussen & Guido Keijzers

Authors
  1. Lene Juel Rasmussen
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  2. Guido Keijzers
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Correspondence to Lene Juel Rasmussen or Guido Keijzers .

Editor information

Editors and Affiliations

  1. Dept. Biological Science, Department of Molecular Science and Tech College of Natural Science, Suwon, Korea (Republic of)

    Sangdun Choi

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Rasmussen, L.J., Keijzers, G. (2016). EXO1 (Exonuclease 1). In: Choi, S. (eds) Encyclopedia of Signaling Molecules. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6438-9_101686-1

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  • DOI: https://doi.org/10.1007/978-1-4614-6438-9_101686-1

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