Saccharomyces cerevisiae Pex14p contains two independent Pex5p binding sites, which are both essential for PTS1 protein import. 2005

Chris Williams, and Marlene van den Berg, and Ben Distel
Department of Medical Biochemistry, Academic Medical Center, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.

Pex14p is a peroxisomal membrane-associated protein involved in docking of both Pex5p and Pex7p to the peroxisomal membrane. Previous studies have shown that, in humans, the N-terminal region of Pex14p interacts with WxxxF/Y motifs in Pex5p. Here, we report that Saccharomyces cerevisiae Pex14p contains two independent Pex5p binding sites, one in the N- and one in the C-terminus. Using deletion analysis we show that, in vivo, both of these interactions are needed for PTS1 import. Furthermore, we show that the characterized WxxxF/Y motifs of Pex5p are not essential for binding to the N-terminus of Pex14p but do play a role in the interaction with the Pex14 C-terminus. Thus, the data suggest that the mechanism of the Pex14p-Pex5p interaction in yeast is different from that previously reported for humans.

UI MeSH Term Description Entries
D008565 Membrane Proteins Proteins which are found in membranes including cellular and intracellular membranes. They consist of two types, peripheral and integral proteins. They include most membrane-associated enzymes, antigenic proteins, transport proteins, and drug, hormone, and lectin receptors. Cell Membrane Protein,Cell Membrane Proteins,Cell Surface Protein,Cell Surface Proteins,Integral Membrane Proteins,Membrane-Associated Protein,Surface Protein,Surface Proteins,Integral Membrane Protein,Membrane Protein,Membrane-Associated Proteins,Membrane Associated Protein,Membrane Associated Proteins,Membrane Protein, Cell,Membrane Protein, Integral,Membrane Proteins, Integral,Protein, Cell Membrane,Protein, Cell Surface,Protein, Integral Membrane,Protein, Membrane,Protein, Membrane-Associated,Protein, Surface,Proteins, Cell Membrane,Proteins, Cell Surface,Proteins, Integral Membrane,Proteins, Membrane,Proteins, Membrane-Associated,Proteins, Surface,Surface Protein, Cell
D012097 Repressor Proteins Proteins which maintain the transcriptional quiescence of specific GENES or OPERONS. Classical repressor proteins are DNA-binding proteins that are normally bound to the OPERATOR REGION of an operon, or the ENHANCER SEQUENCES of a gene until a signal occurs that causes their release. Repressor Molecules,Transcriptional Silencing Factors,Proteins, Repressor,Silencing Factors, Transcriptional
D005656 Fungal Proteins Proteins found in any species of fungus. Fungal Gene Products,Fungal Gene Proteins,Fungal Peptides,Gene Products, Fungal,Yeast Proteins,Gene Proteins, Fungal,Peptides, Fungal,Proteins, Fungal
D000074401 Peroxins Proteins that are essential for the assembly of PEROXISOMES. They recognize and transport cytoplasmic proteins that contain PEROXISOMAL TARGETING SIGNALS (PTS) to the peroxisome. Mutations in peroxin (PEX) genes are associated with several PEROXISOMAL DISORDERS. Peroxin,Peroxisome Biogenesis Factors,Biogenesis Factors, Peroxisome
D000074435 Peroxisome-Targeting Signal 1 Receptor A cytoplasmic receptor and peroxin that contains a series of TETRATRICOPEPTIDE REPEATS and binds to PEROXISOME TARGETING SIGNAL 1 (SKL-type). It is essential for protein import into PEROXISOMES; mutations in the PEX5 gene are associated with PEROXISOMAL DISORDERS such as ZELLWEGER SYNDROME. PTS1 Receptor,PTS1 Receptors,Peroxin PEX5,Peroxin-5,Peroxisomal Biogenesis Factor 5,Peroxisome Receptor 1,PEX5, Peroxin,Peroxin 5,Peroxisome Targeting Signal 1 Receptor,Receptor, PTS1,Receptors, PTS1
D001665 Binding Sites The parts of a macromolecule that directly participate in its specific combination with another molecule. Combining Site,Binding Site,Combining Sites,Site, Binding,Site, Combining,Sites, Binding,Sites, Combining
D012441 Saccharomyces cerevisiae A species of the genus SACCHAROMYCES, family Saccharomycetaceae, order Saccharomycetales, known as "baker's" or "brewer's" yeast. The dried form is used as a dietary supplement. Baker's Yeast,Brewer's Yeast,Candida robusta,S. cerevisiae,Saccharomyces capensis,Saccharomyces italicus,Saccharomyces oviformis,Saccharomyces uvarum var. melibiosus,Yeast, Baker's,Yeast, Brewer's,Baker Yeast,S cerevisiae,Baker's Yeasts,Yeast, Baker
D017384 Sequence Deletion Deletion of sequences of nucleic acids from the genetic material of an individual. Deletion Mutation,Deletion Mutations,Deletion, Sequence,Deletions, Sequence,Mutation, Deletion,Mutations, Deletion,Sequence Deletions
D018160 Receptors, Cytoplasmic and Nuclear Intracellular receptors that can be found in the cytoplasm or in the nucleus. They bind to extracellular signaling molecules that migrate through or are transported across the CELL MEMBRANE. Many members of this class of receptors occur in the cytoplasm and are transported to the CELL NUCLEUS upon ligand-binding where they signal via DNA-binding and transcription regulation. Also included in this category are receptors found on INTRACELLULAR MEMBRANES that act via mechanisms similar to CELL SURFACE RECEPTORS. Cytoplasmic Receptor,Cytoplasmic and Nuclear Receptors,Cytosolic and Nuclear Receptors,Hormone Receptors, Cytoplasmic,Hormone Receptors, Nuclear,Nuclear Hormone Receptor,Nuclear Receptor,Nuclear and Cytoplasmic Receptors,Cytoplasmic Hormone Receptors,Cytoplasmic Receptors,Cytosol and Nuclear Receptors,Intracellular Membrane Receptors,Nuclear Hormone Receptors,Nuclear Receptors,Receptors, Cytoplasmic,Receptors, Cytosol and Nuclear,Receptors, Cytosolic and Nuclear,Receptors, Intracellular Membrane,Receptors, Nuclear,Receptors, Nuclear and Cytoplasmic,Hormone Receptor, Nuclear,Membrane Receptors, Intracellular,Receptor, Cytoplasmic,Receptor, Nuclear,Receptor, Nuclear Hormone,Receptors, Cytoplasmic Hormone,Receptors, Nuclear Hormone
D020798 Two-Hybrid System Techniques Screening techniques first developed in yeast to identify genes encoding interacting proteins. Variations are used to evaluate interplay between proteins and other molecules. Two-hybrid techniques refer to analysis for protein-protein interactions, one-hybrid for DNA-protein interactions, three-hybrid interactions for RNA-protein interactions or ligand-based interactions. Reverse n-hybrid techniques refer to analysis for mutations or other small molecules that dissociate known interactions. One-Hybrid System Techniques,Reverse One-Hybrid System Techniques,Reverse Two-Hybrid System Techniques,Three-Hybrid System Techniques,Yeast Two-Hybrid Assay,Yeast Two-Hybrid System Techniques,One-Hybrid System Technics,Reverse Three-Hybrid System Techniques,Three-Hybrid System Technics,Tri-Hybrid System Techniques,Two-Hybrid Assay,Two-Hybrid Method,Two-Hybrid System Technics,Yeast One-Hybrid System Techniques,Yeast Three-Hybrid Assay,Yeast Three-Hybrid System,Yeast Three-Hybrid System Techniques,Yeast Two-Hybrid System,n-Hybrid System Techniques,Assay, Two-Hybrid,Assay, Yeast Three-Hybrid,Assay, Yeast Two-Hybrid,Assays, Two-Hybrid,Assays, Yeast Three-Hybrid,Assays, Yeast Two-Hybrid,Method, Two-Hybrid,Methods, Two-Hybrid,One Hybrid System Technics,One Hybrid System Techniques,One-Hybrid System Technic,One-Hybrid System Technique,Reverse One Hybrid System Techniques,Reverse Three Hybrid System Techniques,Reverse Two Hybrid System Techniques,System Technique, n-Hybrid,System Techniques, n-Hybrid,System, Yeast Three-Hybrid,System, Yeast Two-Hybrid,Systems, Yeast Three-Hybrid,Systems, Yeast Two-Hybrid,Technic, One-Hybrid System,Technic, Three-Hybrid System,Technic, Two-Hybrid System,Technics, One-Hybrid System,Technics, Three-Hybrid System,Technics, Two-Hybrid System,Technique, One-Hybrid System,Technique, Three-Hybrid System,Technique, Tri-Hybrid System,Technique, Two-Hybrid System,Technique, n-Hybrid System,Techniques, One-Hybrid System,Techniques, Three-Hybrid System,Techniques, Tri-Hybrid System,Techniques, Two-Hybrid System,Techniques, n-Hybrid System,Three Hybrid System Technics,Three Hybrid System Techniques,Three-Hybrid Assay, Yeast,Three-Hybrid Assays, Yeast,Three-Hybrid System Technic,Three-Hybrid System Technique,Three-Hybrid System, Yeast,Three-Hybrid Systems, Yeast,Tri Hybrid System Techniques,Tri-Hybrid System Technique,Two Hybrid Assay,Two Hybrid Method,Two Hybrid System Technics,Two Hybrid System Techniques,Two-Hybrid Assay, Yeast,Two-Hybrid Assays,Two-Hybrid Assays, Yeast,Two-Hybrid Methods,Two-Hybrid System Technic,Two-Hybrid System Technique,Two-Hybrid System, Yeast,Two-Hybrid Systems, Yeast,Yeast One Hybrid System Techniques,Yeast Three Hybrid Assay,Yeast Three Hybrid System,Yeast Three Hybrid System Techniques,Yeast Three-Hybrid Assays,Yeast Three-Hybrid Systems,Yeast Two Hybrid Assay,Yeast Two Hybrid System,Yeast Two Hybrid System Techniques,Yeast Two-Hybrid Assays,Yeast Two-Hybrid Systems,n Hybrid System Techniques,n-Hybrid System Technique

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