17-31182600-A-T
Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PP2
The NM_001042492.3(NF1):c.823A>T(p.Ile275Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,730 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. I275L) has been classified as Uncertain significance.
Frequency
Consequence
NM_001042492.3 missense
Scores
Clinical Significance
Conservation
Genome browser will be placed here
ACMG classification
Verdict is Uncertain_significance. Variant got 5 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
NF1 | NM_001042492.3 | c.823A>T | p.Ile275Phe | missense_variant | 8/58 | ENST00000358273.9 | |
NF1 | NM_000267.3 | c.823A>T | p.Ile275Phe | missense_variant | 8/57 | ||
NF1 | NM_001128147.3 | c.823A>T | p.Ile275Phe | missense_variant | 8/15 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
NF1 | ENST00000358273.9 | c.823A>T | p.Ile275Phe | missense_variant | 8/58 | 1 | NM_001042492.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461730Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 727160
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Neurofibromatosis, type 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 26, 2022 | 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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 216415). This variant has not been reported in the literature in individuals affected with NF1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces isoleucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 275 of the NF1 protein (p.Ile275Phe). - |
Hereditary cancer-predisposing syndrome;CN230736:Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Apr 15, 2020 | The p.I275F variant (also known as c.823A>T), located in coding exon 8 of the NF1 gene, results from an A to T substitution at nucleotide position 823. The isoleucine at codon 275 is replaced by phenylalanine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at