The alignments of the amino acid sequences of inorganic pyrophosphatase (PPase) from Saccharomyces cerevisiae (Y1-PPase, 286 amino acids) and Escherichia coli (E-PPase, 175 amino acids) are examined in the light of crystallographic and chemical modification results placing specific amino acid residues at the active site of the yeast enzyme. The major results are: (1) the full E-PPase sequence aligns within residues 28-225 of Y1-PPase, raising the possibility that the N-terminal and C-terminal portions of Y1-PPase may not be essential for activity, and (2) that whereas the overall identity between the two sequences is only modest (22-27% depending on the choice of alignment parameters), of some 17 putative active site residues, 14-16 are identical between Y-PPase and E-PPase. PPase thus appears to be an example of enzymes from widely divergent species that conserve common functional elements within the context of substantial overall sequence variation.
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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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