Title: The difference in recognition of terminal tripeptides as peroxisomal targeting signal 1 between yeast and human is due to different affinities of their receptor Pex5p to the cognate signal and to residues adjacent to it
Authors: Lametschwandtner, G
Brocard, C
Fransen, Marc
Van Veldhoven, Paul P
Berger, J
Hartig, A # ×
Issue Date: Jan-1998
Series Title: Journal of Biological Chemistry vol:273 issue:50 pages:33635-33643
Abstract: Pex5p is the receptor for the peroxisomal targeting signal 1 (PTS1) that consists of a C-terminal tripeptide (consensus (S/A/C)(K/R/H)(L/M)). Hexadecapeptides recognized by Pex5p from Homo sapiens and Saccharomyces cerevisiae were identified by screening a two-hybrid peptide library, and the targeting ability of the peptides was demonstrated using the green fluorescent protein as reporter. The PTS1 receptors recognized in a species-specific manner a broad range of C-terminal tripeptides, and these are reported herein. In addition, residues upstream of the tripeptide influenced the strength of the interaction in the two-hybrid system as well as in an in vitro competition assay. In peptides interacting with the human protein, hydrophobic residues were found with high frequency especially at positions -2 and -5, whereas peptides interacting with S. cerevisiae Pex5p were more hydrophilic and frequently contained arginine at position -2. In instances where the terminal tripeptide deviated from the consensus, upstream residues exerted a greater influence on the ability of the hexadecapeptides to bind Pex5p.
ISSN: 0021-9258
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Pharmacology Section (-)
Laboratory of Lipid Biochemistry and Protein Interactions
× corresponding author
# (joint) last author

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