The Cullin Ring Ligase family member, Cul7, is required for normal mouse development and cellular proliferation. Cul7 has a CPH domain which is a p53 interaction domain. The CPH domain interaction surface of P53 is present in the tetramerisation domain [1].

1: The conserved CPH domains of Cul7 and PARC are protein-protein interaction modules that bind the tetramerization domain of p53. Kaustov L, Lukin J, Lemak A, Duan S, Ho M, Doherty R, Penn LZ, Arrowsmith CH; J Biol Chem. 2007;282:11300-11307. PMID:17298945