A Class 2 alpha-mannosidase gene was cloned and sequenced from the filamentous fungus Aspergillus nidulans. A portion of the gene was amplified using degenerate oligonucleotide primers which were designed based on similarity between the Saccharomyces cerevisiae vacuolar and rat ER/cytosolic Class 2 protein sequences. The PCR amplification product was used to isolate the full length gene, and DNA sequencing revealed a 3383 bp coding region containing three introns. The predicted 1049 amino acid reading frame contained six potential N-glycosylation sites and encoded a protein of 118 kDa. The protein sequence did not appear to encode a typical fungal signal sequence or membrane spanning domain. Although the cellular location of the A.nidulans mannosidase was not determined, experimental evidence suggested that it was located within a subcellular organelle. The Matchbox sequence similarity matrix indicated that the A.nidulans protein sequence was more highly similar to the rat ER/cytosolic (Rij = 0.33) and S.cerevisiae vacuolar alpha-mannosidases (Rij = 0.43) than the rat and yeast sequences were to each other (Rij = 0.29). These three enzymes were found to be distantly related to other Class 2 sequences, and compose a third subgroup of Class 2 alpha-mannosidases, as shown by ClustalW sequence alignment.
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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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