Peroxisome Targeting Signal Type 1 (PTS1) Receptor Is Involved in Import of Both PTS1 and PTS2: Studies with PEX5 -Defective CHO Cell Mutants
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چکیده
منابع مشابه
Hsp70 regulates the interaction between the peroxisome targeting signal type 1 (PTS1)-receptor Pex5p and PTS1.
The peroxisome targeting signal type 1 (PTS1) receptor, Pex5p, of the tetratricopeptide repeat (TPR) motif family is located mostly in the cytosol and mediates the translocation of PTS1 proteins to peroxisomes. As a step towards understanding the mechanisms of protein import into peroxisomes, we investigated the molecular mechanisms involved in PTS1 recognition by Pex5p with regard to requireme...
متن کاملpex5 Mutants that differentially disrupt PTS1 and PTS2 peroxisomal matrix protein import in Arabidopsis.
PEX5 and PEX7 are receptors required for the import of peroxisome-bound proteins containing one of two peroxisomal targeting signals (PTS1 or PTS2). To better understand the role of PEX5 in plant peroxisomal import, we characterized the Arabidopsis (Arabidopsis thaliana) pex5-10 mutant, which has a T-DNA insertion in exon 5 of the PEX5 gene. Sequencing results revealed that exon 5, along with t...
متن کاملAn isoform of pex5p, the human PTS1 receptor, is required for the import of PTS2 proteins into peroxisomes.
Mutations in the peroxisome targeting signal (PTS) 1 receptor gene, PEX5 , are responsible for complementation group (CG) 2 of the peroxisome biogenesis disorders (PBD). Of the two reported patients in this CG, cells from PBD018 (homozygous for the missense mutation N489K) are defective in the import of PTS1 proteins into peroxisomes, as expected. However, cells from PBD005 (homozygous for the ...
متن کاملA small molecule with differential effects on the PTS1 and PTS2 peroxisome matrix import pathways.
The use of small molecules has great power to dissect biological processes. This study presents the identification and characterisation of an inhibitor of peroxisome matrix protein import. A mini-screen was carried out to identify molecules that cause alteration in peroxisome morphology, or mislocalization of a peroxisome targeted fluorescent reporter protein. A benzimidazole lead compound (LDS...
متن کاملPeroxisomal ubiquitin-protein ligases peroxin2 and peroxin10 have distinct but synergistic roles in matrix protein import and peroxin5 retrotranslocation in Arabidopsis.
Peroxisomal matrix proteins carry peroxisomal targeting signals (PTSs), PTS1 or PTS2, and are imported into the organelle with the assistance of peroxin (PEX) proteins. From a microscopy-based screen to identify Arabidopsis (Arabidopsis thaliana) mutants defective in matrix protein degradation, we isolated unique mutations in PEX2 and PEX10, which encode ubiquitin-protein ligases anchored in th...
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ژورنال
عنوان ژورنال: Molecular and Cellular Biology
سال: 1998
ISSN: 0270-7306,1098-5549
DOI: 10.1128/mcb.18.1.388