Research Paper Volume 6, Issue 1 pp 70—81

Serines 440 and 467 in the Werner syndrome protein are phosphorylated by DNA-PK and affects its dynamics in response to DNA double strand breaks

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Figure 3. In vitro phosphorylation at Ser-440 and −467 by DNA-PK.

GST-tagged WRN fragment (239-499) as schematically represented was used. Purified GST or GST-tagged fragment with or without Ala substitution at Ser-440 and/or −467 was incubated with purified DNA-PKcs, Ku 70/86, and activated DNA in the presence of [γ-32P]ATP. Phosphorylation was visualized (upper panel). An immunoblot with anti-GST antibody is shown (lower panel).