The deubiquitinating enzyme USP9X binds ubiquitinated PEX5L (ubiquitin conjugated to the large isoform of PEX5, Ub:PEX5L) and then hydrolyzes the thioester bond between the carboxyl terminus of ubiquitin and cysteine-11 of PEX5L (Grou et al. 2012).
Grou, CP, Francisco, T, Rodrigues, TA, Freitas, MO, Pinto, MP, Carvalho, AF, Domingues, P, Wood, SA, Rodríguez-Borges, JE, Sá-Miranda, C, Fransen, M, Azevedo, JE
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