4-1801844-C-A
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PM5PP3_Moderate
The NM_000142.5(FGFR3):c.749C>A(p.Pro250Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000187 in 1,606,992 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P250R) has been classified as Pathogenic.
Frequency
Consequence
NM_000142.5 missense
Scores
Clinical Significance
Conservation
Genome browser will be placed here
ACMG classification
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00000657 AC: 1AN: 152186Hom.: 0 Cov.: 33
GnomAD4 exome AF: 0.00000137 AC: 2AN: 1454806Hom.: 0 Cov.: 39 AF XY: 0.00 AC XY: 0AN XY: 722914
GnomAD4 genome AF: 0.00000657 AC: 1AN: 152186Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0AN XY: 74364
ClinVar
Submissions by phenotype
not provided Uncertain:2
This sequence change replaces proline, which is neutral and non-polar, with glutamine, which is neutral and polar, at codon 250 of the FGFR3 protein (p.Pro250Gln). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with FGFR3-related conditions. Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on FGFR3 protein function. This variant disrupts the p.Pro250 amino acid residue in FGFR3. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 9042914, 10094188, 10861678, 15915095, 26740388). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 8841188) -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at