ArticleMolecular and cellular biology2002
Peroxisomal targeting signal receptor Pex5p interacts with cargoes and import machinery components in a spatiotemporally differentiated manner: conserved Pex5p WXXXF/Y motifs are critical for matrix protein import.
Article in Molecular and cellular biology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers.
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71 citing papers in PubMed, 204 citations in OpenAlex.
- Structural basis of receptor retro-translocation in peroxisomal protein import.bioRxiv : the preprint server for biology · 2026Article
- Pex6 and ubiquitination regulate topological remodeling of the peroxisomal membrane protein Pex14.The Journal of biological chemistry · 2026Article
- Structure of Trypanosoma peroxisomal import complex unveils conformational heterogeneity.Nature communications · 2025Article
- PEX14 condensates recruit receptor and cargo pairs for peroxisomal protein import.Nature structural & molecular biology · 2025Article
- An Evolutionary Study in Glyphosate Oxidoreductase Gox Highlights Distinct Orthologous Groups and Novel Conserved Motifs That Can Classify Gox and Elucidate Its Biological Role.Journal of xenobiotics · 2025Article
- PEX39 facilitates the peroxisomal import of PTS2-containing proteins.Nature cell biology · 2025Article
- Towards solving the mystery of peroxisomal matrix protein import.Trends in cell biology · 2024Review
- Modulation of peroxisomal import by the PEX13 SH3 domain and a proximal FxxxF binding motif.Nature communications · 2024Article
- Noncanonical and reversible cysteine ubiquitination prevents the overubiquitination of PEX5 at the peroxisomal membrane.PLoS biology · 2024Article
- The peroxisome protein translocation machinery is developmentally regulated in the fungusMicrobiology spectrum · 2024Article
- Article
- Fusarium verticillioides Pex7/20 mediates peroxisomal PTS2 pathway import, pathogenicity, and fumonisin B1 biosynthesis.Applied microbiology and biotechnology · 2022Article
- PEX5 translocation into and out of peroxisomes drives matrix protein import.Molecular cell · 2022Article
- Insights into the Structure and Function of the Pex1/Pex6 AAA-ATPase in Peroxisome Homeostasis.Cells · 2022Review
- Two Pex5 Proteins With Different Cargo Specificity Are Critical for Peroxisome Function in Ustilago maydis.Frontiers in cell and developmental biology · 2022Article
- The Peroxisomal Localization of Hsd17b4 Is Regulated by Its Interaction with Phosphatidylserine.Molecules and cells · 2021Article
- Current advances in the function and biogenesis of peroxisomes and their roles in health and disease.Histochemistry and cell biology · 2021Article
- Challenges of Using Expansion Microscopy for Super-resolved Imaging of Cellular Organelles.Chembiochem : a European journal of chemical biology · 2021Article
- Comparative Genomics of Peroxisome Biogenesis Proteins: Making Sense of the PEX Proteins.Frontiers in cell and developmental biology · 2021Article
- Mitotic phosphorylation of Pex14p regulates peroxisomal import machinery.The Journal of cell biology · 2020Article
11 more citing papers are in PubMed but not listed here.
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6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Two isoforms of the peroxisomal targeting signal type 1 (PTS1) receptor, termed Pex5pS and (37-amino-acid-longer) Pex5pL, are expressed in mammals. Pex5pL transports PTS1 proteins and Pex7p-PTS2 cargo complexes to the initial Pex5p-docking site, Pex14p, on peroxisome membranes, while Pex5pS translocates only PTS1 cargoes. Here we report functional Pex5p domains responsible for interaction with peroxins Pex7p, Pex13p, and Pex14p. An N-terminal half, such as Pex5pL(1-243), comprising amino acid residues 1 to 243, bound to Pex7p, Pex13p, and Pex14p and was sufficient for restoring the impaired PTS2 import of pex5 cell mutants, while the C-terminal tetratricopeptide repeat motifs were required for PTS1 binding. N-terminal Pex5p possessed multiple Pex14p-binding sites. Alanine-scanning analysis of the highly conserved seven (six in Pex5pS) pentapeptide WXXXF/Y motifs residing at the N-terminal region indicated that these motifs were essential for the interaction of Pex5p with Pex14p and Pex13p. Moreover, mutation of several WXXXF/Y motifs did not affect the PTS import-restoring activity of Pex5p, implying that the binding of Pex14p to all of the WXXXF/Y sites was not a prerequisite for the translocation of Pex5p-cargo complexes. Pex5p bound to Pex13p at the N-terminal part, not to the C-terminal SH3 region, via WXXXF/Y motifs 2 to 4. PTS1 and PTS2 import required the interaction of Pex5p with Pex14p but not with Pex13p, while Pex5p binding to Pex13p was essential for import of catalase with PTS1-like signal KANL. Pex5p recruited PTS1 proteins to Pex14p but not to Pex13p. Pex14p and Pex13p formed a complex with PTS1-loaded Pex5p but dissociated in the presence of cargo-unloaded Pex5p, implying that PTS cargoes are released from Pex5p at a step downstream of Pex14p and upstream of Pex13p. Thus, Pex14p and Pex13p very likely form mutually and temporally distinct subcomplexes involved in peroxisomal matrix protein import.
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