Protein-protein interactions are essential to cellular mechanisms at all levels in biologically responsive systems. These interactions occur extracellularly and include ligand-receptor interactions, cell adhesion, antigen recognition, and virus-host recognition. Intracellular protein-protein interactions occur in the formation of multi-protein complexes, during the assembly of cytoskeletal elements, and between receptor-effector, as well as effector-effector, molecules of signal transduction pathways. Finally, assembly of transcriptional machinery involves protein interactions. The yeast two-hybrid method is a powerful technique for analyzing these protein-protein interactions. Since the publication of this technique in the late 1980s, the robust nature and far-reaching utility of yeast two-hybrid systems for functional expression library cloning has led to the identification of many novel proteins in all areas of biological life science research. Additionally, two-hybrid techniques provide a rapid and versatile system for the further characterization of discrete protein-protein interactions. Recent variations on the basic system have enabled application well beyond protein pairs, to investigate multi-protein complexes and protein-nucleotide interactions. Yeast two-hybrid methods necessitate expression and subsequent interaction between a "protein of interest" functional pair within the yeast cell, ultimately driving reporter gene expression and thus effectively linking protein-protein interaction(s) to a change in yeast cell phenotype. Functional protein-protein interactions using the two-hybrid techniques have been demonstrated for all levels of cellular biology; however, until recently, extracellular protein-protein interactions were excluded from investigations using this technique. Investigations from several labs have now demonstrated that extracellular proteins can be studied using two-hybrid methods, thereby enabling intense study of extracellular protein partners using the robust nature and the genetic power of yeast.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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