We surveyed Delta1-pyrroline 5-carboxylate dehydrogenase genes from four patients with hyperprolinemia type II using RT-PCR amplification, genomic PCR amplification and direct sequencing. We found four mutant alleles, two with frameshift mutations [A7fs(-1) and G521fs(+1)] and two with missense mutations (S352L and P16L). To test the functional consequences of three of these, we expressed them in a P5CDh-deficient strain of Saccharomyces cerevisiae . In contrast to wild-type human P5CDh, yeast expressing S352L and G521fs(+1) failed to grow on proline and had no detectable P5CDh activity. The P16L allele, however, produced fully functional P5CDh and subsequent analysis suggests that it is polymorphic in the relevant (Spanish) population. Interestingly, the G521fs(+1) allele segregates in the large Irish Traveller pedigree used to define the HPII phenotype. To our knowledge, this is the first description of the molecular basis for this inborn error.
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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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