Protist oxygen-sensing and the role of prolyl hydroxylase-regulation of E3(SCF) ubiquitin ligases
A primary mechanism for sensing O2 in animals involves the O2-dependent prolyl hydroxylase PHD2, which generates a degron on the transcription co-factor HIF-α. In protists, its apparent evolutionary predecessor, PhyA, is dedicated to the modification of Skp1. Skp1 is a subunit of the E3(SCF) family of ubiquitin ligases whose impact on the proteome is mediated by …