The mel-32 gene in the free living soil nematode Caenorhabditis elegans encodes a serine hydroxymethyltransferase (SHMT) isoform. Seventeen ethylmethanesulfonate (EMS)-induced mutant alleles of mel-32(SHMT) have been generated, each of which causes a recessive maternal effect lethal phenotype. Animals homozygous for the SHMT mutations have no observable mutant phenotype, but their offspring display an embryonic lethal phenotype. The Mel-32 phenotype has been rescued with a transgenic array containing only mel-32(SHMT) genomic DNA. Heteroduplex analysis of the 17 alleles allowed 14 of the mutations to be positioned to small regions. Subsequent sequence analysis has shown that 16 of the alleles alter highly conserved amino acids, while one allele introduces a stop codon that truncates two thirds of the predicted protein. mel-32(SHMT) has a 55-60% identity at the amino acid level with both isoforms of SHMT found in yeast and humans and a 50% identity with the Escherichia coli isoform. The C. elegans mel-32 mutation represents the first case where SHMT has been shown to be an essential gene.
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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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