Download MendeleyZinc binding catalytic domain of human tankyrase 1.
Lehtio, L., Collins, R., van den Berg, S., Johansson, A., Dahlgren, L.G., Hammarstrom, M., Helleday, T., Holmberg-Schiavone, L., Karlberg, T., Weigelt, J.(2008) J Mol Biol 379: 136-145
- PubMed: 18436240
- DOI: https://doi.org/10.1016/j.jmb.2008.03.058
- Primary Citation of Related Structures:
2RF5 - PubMed Abstract:
Tankyrases are recently discovered proteins implicated in many important functions in the cell including telomere homeostasis and mitosis. Tankyrase modulates the activity of target proteins through poly(ADP-ribosyl)ation, and here we report the structure of the catalytic poly(ADP-ribose) polymerase (PARP) domain of human tankyrase 1. This is the first structure of a PARP domain from the tankyrase subfamily. The present structure reveals that tankyrases contain a short zinc-binding motif, which has not been predicted. Tankyrase activity contributes to telomere elongation observed in various cancer cells and tankyrase inhibition has been suggested as a potential route for cancer therapy. In comparison with other PARPs, significant structural differences are observed in the regions lining the substrate-binding site of tankyrase 1. These findings will be of great value to facilitate structure-based design of selective PARP inhibitors, in general, and tankyrase inhibitors, in particular.
Organizational Affiliation:
Structural Genomics Consortium, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, S-17177 Stockholm, Sweden.
