We have previously shown that the Saccharomyces cerevisiae cell adhesion protein alpha-agglutinin has sequence characteristics of immunoglobulin-like proteins and have successfully modeled residues 200-325, based on the structure of immunoglobulin variable-type domains. Alignments matching residues 20-200 of alpha-agglutinin with domains I and II of members of the CD2/CD4 subfamily of the immunoglobulin superfamily showed > 80% conservation of key residues despite low sequence similarity overall. Three-dimensional models of two alpha-agglutinin domains constructed on the basis of these alignments were shown to conform to peptide mapping data and biophysical properties of alpha-agglutinin. In addition, the residue volume and surface accessibility characteristics of these models resembled those of the well-packed structures of related proteins. Residue-by-residue analysis showed that packing and accessibility anomalies were largely confined to glycosylated and protease-susceptible loop regions of the domains. Surface accessibility of hydrophobic residues was typical of proteins with extensive domain interactions, a finding compatible with the hydrodynamic properties of alpha -agglutinin and the hydrophobic nature of binding to its peptide ligand alpha-agglutinin. The procedures used to align the alpha-agglutinin sequence and test the quality of the model may be applicable to other proteins, especially those that resist crystallization because of extensive glycosylation.
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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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