Mapping of interaction domains of putative telomere-binding proteins AtTRB1 and AtPOT1b from Arabidopsis thaliana. 2008

Petra Procházková Schrumpfová, and Milan Kuchar, and Jan Palecek, and Jirí Fajkus
Department of Functional Genomics and Proteomics, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, CZ-62500 Brno, Czech Republic.

We previously searched for interactions between plant telomere-binding proteins and found that AtTRB1, from the single-myb-histone (Smh) family, interacts with the Arabidopsis POT1-like-protein, AtPOT1b, involved in telomere capping. Here we identify domains responsible for that interaction. We also map domains in AtTRB1 responsible for interactions with other Smh-family-members. Our results show that the N-terminal OB-fold-domain of AtPOT1b mediates the interaction with AtTRB1. This domain is characteristic for POT1- proteins and is involved with binding the G-rich-strand of telomeric DNA. AtPOT1b also interacts with AtTRB2 and AtTRB3. The central histone-globular-domain of AtTRB1 is involved with binding to AtTRB2 and 3, as well as to AtPOT1b. AtTRB1-heterodimers with other Smh-family-members are more stable than AtTRB1-homodimers. Our results reveal interaction networks of plant telomeres.

UI MeSH Term Description Entries
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D003001 Cloning, Molecular The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells. Molecular Cloning
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D054730 Protein Interaction Domains and Motifs Protein modules with conserved ligand-binding surfaces which mediate specific interaction functions in SIGNAL TRANSDUCTION PATHWAYS and the specific BINDING SITES of their cognate protein LIGANDS. Protein Interaction Domains,Protein Interaction Motifs,Binding Motifs, Protein Interaction,Protein Interaction Binding Motifs,Protein-Protein Interaction Domains,Domain, Protein Interaction,Domain, Protein-Protein Interaction,Domains, Protein Interaction,Domains, Protein-Protein Interaction,Motif, Protein Interaction,Motifs, Protein Interaction,Protein Interaction Domain,Protein Interaction Motif,Protein Protein Interaction Domains,Protein-Protein Interaction Domain
D019281 Dimerization The process by which two molecules of the same chemical composition form a condensation product or polymer. Dimerizations
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
D029681 Arabidopsis Proteins Proteins that originate from plants species belonging to the genus ARABIDOPSIS. The most intensely studied species of Arabidopsis, Arabidopsis thaliana, is commonly used in laboratory experiments. Arabidopsis thaliana Proteins,Thale Cress Proteins,Proteins, Arabidopsis thaliana,thaliana Proteins, Arabidopsis
D034501 Telomere-Binding Proteins Proteins that specifically bind to TELOMERES. Proteins in this class include those that perform functions such as telomere capping, telomere maintenance and telomere stabilization. Telomere-Binding Protein,Double-Stranded Telomere-Binding Proteins,Double-Stranded Telomeric Binding Protein,Single-Stranded Telomere-Binding Protein,Single-Stranded Telomere-Binding Proteins,Telomer-Binding Protein, alpha-Subunit,Telomer-Binding Protein, beta-Subunit,Telomere End-Binding Protein (TEBP),Telomere Repeat Binding Factor,Telomere Repeat Binding Factors,Telomere Repeat Binding Proteins,Telomere-Binding Proteins, Double Stranded,Telomere-Binding Proteins, Single-Stranded,alpha-Telomere-Binding Protein,beta-Telomere-Binding Protein,Double Stranded Telomere Binding Proteins,Double Stranded Telomeric Binding Protein,Protein, Telomere-Binding,Single Stranded Telomere Binding Protein,Single Stranded Telomere Binding Proteins,Telomer Binding Protein, alpha Subunit,Telomer Binding Protein, beta Subunit,Telomere Binding Protein,Telomere Binding Proteins,Telomere Binding Proteins, Double Stranded,Telomere Binding Proteins, Single Stranded,Telomere-Binding Protein, Single-Stranded,Telomere-Binding Proteins, Double-Stranded,alpha Telomere Binding Protein,alpha-Subunit Telomer-Binding Protein,beta Telomere Binding Protein,beta-Subunit Telomer-Binding Protein

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