rs1057519480
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_001453.3(FOXC1):c.718_719del(p.Leu240ValfsTer65) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. L240L) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 31)
Consequence
FOXC1
NM_001453.3 frameshift
NM_001453.3 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 0.534
Genes affected
FOXC1 (HGNC:3800): (forkhead box C1) This gene belongs to the forkhead family of transcription factors which is characterized by a distinct DNA-binding forkhead domain. The specific function of this gene has not yet been determined; however, it has been shown to play a role in the regulation of embryonic and ocular development. Mutations in this gene cause various glaucoma phenotypes including primary congenital glaucoma, autosomal dominant iridogoniodysgenesis anomaly, and Axenfeld-Rieger anomaly. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 18 ACMG points.
PVS1
?
Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 27 pathogenic variants in the truncated region.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 6-1611162-CCT-C is Pathogenic according to our data. Variant chr6-1611162-CCT-C is described in ClinVar as [Pathogenic]. Clinvar id is 375429.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-1611162-CCT-C is described in Lovd as [Likely_pathogenic]. Variant chr6-1611162-CCT-C is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
FOXC1 | NM_001453.3 | c.718_719del | p.Leu240ValfsTer65 | frameshift_variant | 1/1 | ENST00000645831.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
FOXC1 | ENST00000645831.2 | c.718_719del | p.Leu240ValfsTer65 | frameshift_variant | 1/1 | NM_001453.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 31
GnomAD3 genomes
?
Cov.:
31
We have no GnomAD4 exomes data on this position. Probably position not covered by the project.
GnomAD4 genome ? Cov.: 31
GnomAD4 genome
?
Cov.:
31
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:4
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Axenfeld-Rieger syndrome type 3 Pathogenic:3
Pathogenic, no assertion criteria provided | clinical testing | Genetics and Molecular Pathology, SA Pathology | Jun 11, 2015 | Frame-shift introducing premature terminating codon (PTC) effecting functional haploinufficiency; clinical significance consistent with FOXC1 PTC variants found upstream and down stream of this position - each regarded as pathogenic in published literature. - |
Pathogenic, criteria provided, single submitter | research | Human Developmental Genetics Laboratory, Medical College of Wisconsin | Jun 23, 2022 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | May 25, 2017 | For these reasons, this variant has been classified as Pathogenic. A different truncation downstream of this variant (c.816_817delinsG) has been determined to be pathogenic (PMID: 20881294). This suggests that deletion of this region of the FOXC1 protein is causative of disease. This variant has been reported to be de novo in an individual affected with Axenfeld-Rieger syndrome with developmental glaucoma (PMID: 16638984). ClinVar contains an entry for this variant (Variation ID: 375429). While this variant is not present in population databases, the frequency information is unreliable, as metrics indicate poor data quality at this position in the ExAC database. This sequence change results in a premature translational stop signal in the FOXC1 gene (p.Leu240Valfs*65). While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 314 amino acids of the FOXC1 protein. - |
Anterior segment dysgenesis 3 Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Victorian Clinical Genetics Services, Murdoch Childrens Research Institute | Dec 21, 2023 | Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as Pathogenic. Following criteria are met: 0102 - Loss of function is a likely mechanism of disease in this gene and is associated with Axenfeld-Rieger syndrome, type 3 (MIM #602482), anterior segment dysgenesis 3 (MIM #601631), congenital glaucoma (PMID: 31836490) and juvenile open angle glaucoma (PMID: 31836490). While loss of function has been functionally proven for some missense variants, the evidence for truncating variants is currently limited (PMID: 19513095). (I) 0107 - This gene is associated with autosomal dominant disease. (I) 0115 - Variants in this gene are known to have variable expressivity. Variants in FOXC1 have been reported to demonstrate interfamilial and intrafamilial expressivity (PMIDs: 19513095; 31836490). 0204 - Variant is predicted to result in a truncated protein (premature termination codon is NOT located at least 54 nucleotides upstream of the final exon-exon junction) with at least 1/3 of the protein sequence affected. (SP) 0251 - This variant is heterozygous. (I) 0301 - Variant is absent from gnomAD (both v2 and v3). (SP) 0604 - Variant is not located in an established domain, motif, hotspot or informative constraint region. (I) 0701 - Other protein-truncating variants comparable to the one identified in this case have very strong previous evidence for pathogenicity. There are greater than four protein-truncating variants located downstream of this variant (ClinVar; Decipher). (SP) 0801 - This variant has strong previous evidence of pathogenicity in unrelated individuals. This variant has been reported as pathogenic in ClinVar and has been observed as de novo in an internal VCGS patient and in an unrelated individual in the literature with FOXC1-related features (ClinVar, PMID: 16638984). (SP) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1205 - This variant has been shown to be maternally inherited (by trio analysis). (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign - |
Computational scores
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at