ATR (ATM- and rad3-related) kinase is an essential checkpoint factor in human cells constitutively associated with ATRIP (ATR-interacting protein). The ATR:ATRIP complex binds RPA complex (RPA1:RPA2:RPA3) associated with ssDNA at resected DNA double strand breaks (DSBs). Complex formation is primarily mediated by physical interaction between ATRIP and RPA1 (Zou and Elledge 2003, Jazayeri et al. 2006).
Zou, L, Elledge, SJ
Jazayeri, A, Falck, J, Lukas, C, Bartek, J, Smith, GC, Lukas, J, Jackson, SP
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