E3 ubiquitin ligase Cullin-5 (CUL5) is recruited to the ERBB2 site at the plasma membrane and ubiquitinates ERBB2 in an HSP90-dependent way, targeting it for degradation. Ubiquitination of ERBB2 by CUL5 appears to be independent of CUL5 adaptor proteins ElonginB and ElonginC.
Yu, XF, Luo, K, Xiao, Z, Neckers, LM, Martinez, T, Xu, W, Wang, T, Ehrlich, ES, Niewiadomska, AM
ubiquitin-protein transferase activity of CUL5 [cytosol]
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