Peroxisome assembly protein 12

Definition:

Component of a retrotranslocation channel required for peroxisome organization by mediating export of the PEX5 receptor from peroxisomes to the cytosol, thereby promoting PEX5 recycling. The retrotranslocation channel is composed of PEX2, PEX10 and PEX12; each subunit contributing transmembrane segments that coassemble into an open channel that specifically allows the passage of PEX5 through the peroxisomal membrane (By similarity). PEX12 also regulates PEX5 recycling by activating the E3 ubiquitin-protein ligase activity of PEX10. When PEX5 recycling is compromised, PEX12 stimulates PEX10-mediated polyubiquitination of PEX5, leading to its subsequent degradation (By similarity).

References:

[1]. K Okumoto, et al. PEX12 encodes an integral membrane protein of peroxisomes. Nat Genet. 1997 Nov;17(3):265-6. [Content Brief]

[2]. Kanji Okumoto, et al. Distinct modes of ubiquitination of peroxisome-targeting signal type 1 (PTS1) receptor Pex5p regulate PTS1 protein import. J Biol Chem. 2014 May 16;289(20):14089-108. [Content Brief]

[3]. K Okumoto, et al. PEX12, the pathogenic gene of group III Zellweger syndrome: cDNA cloning by functional complementation on a CHO cell mutant, patient analysis, and characterization of PEX12p. Mol Cell Biol. 1998 Jul;18(7):4324-36. [Content Brief]

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