ClinVar Miner

Submissions for variant NM_001395413.1(POR):c.1651C>T (p.Arg551Ter)

gnomAD frequency: 0.00003  dbSNP: rs782336856
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Illumina Laboratory Services, Illumina RCV000779538 SCV000916205 uncertain significance Congenital adrenal hyperplasia due to cytochrome P450 oxidoreductase deficiency 2017-08-28 criteria provided, single submitter clinical testing The POR c.1660C>T (p.Arg554Ter) variant is a stop-gained variant, which was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018) and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score for this variant, it could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change. No publications were found based on this search. Due to the potential impact of stop-gained variants and the lack of clarifying evidence, this variant is classified as a variant of unknown significance but suspicious for pathogenicity for cytochrome P450 oxidoreductase deficiency.
Invitae RCV000779538 SCV001415888 pathogenic Congenital adrenal hyperplasia due to cytochrome P450 oxidoreductase deficiency 2024-01-02 criteria provided, single submitter clinical testing This sequence change creates a premature translational stop signal (p.Arg554*) in the POR gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in POR are known to be pathogenic (PMID: 14758361, 20732302, 21741353). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with POR-related conditions. ClinVar contains an entry for this variant (Variation ID: 632506). For these reasons, this variant has been classified as Pathogenic.

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