chr17-31159097-A-T
Variant summary
Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate
The NM_001042492.3(NF1):c.288+4A>T variant causes a splice region, intron change. The variant allele was found at a frequency of 0.000000697 in 1,434,128 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Consequence
NM_001042492.3 splice_region, intron
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 0 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
NF1 | NM_001042492.3 | c.288+4A>T | splice_region_variant, intron_variant | Intron 3 of 57 | ENST00000358273.9 | NP_001035957.1 | ||
NF1 | NM_000267.3 | c.288+4A>T | splice_region_variant, intron_variant | Intron 3 of 56 | NP_000258.1 | |||
NF1 | NM_001128147.3 | c.288+4A>T | splice_region_variant, intron_variant | Intron 3 of 14 | NP_001121619.1 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD4 exome AF: 6.97e-7 AC: 1AN: 1434128Hom.: 0 Cov.: 26 AF XY: 0.00 AC XY: 0AN XY: 715236
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Neurofibromatosis, type 1 Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Victorian Clinical Genetics Services, Murdoch Childrens Research Institute | Sep 02, 2022 | Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3A. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with neurofibromatosis, type 1 (MIM#162200). (I) 0107 - This gene is associated with autosomal dominant disease. (I) 0115 - Variants in this gene are known to have variable expressivity (PMID: 20301288). (I) 0212 - Non-canonical splice site variant without proven consequence on splicing (no functional evidence available). (SP) 0251 - This variant is heterozygous. (I) 0301 - Variant is absent from gnomAD (both v2 and v3). (SP) 0311 - An alternative nucleotide change at the same position is present in gnomAD (v2) (1 heterozygote, 0 homozygotes). (I) 0508 - In silico predictions for abnormal splicing are conflicting. (I) 0704 - Another splice site variant comparable to the one identified in this case has limited previous evidence for pathogenicity. c.288+4A>G has been classified as likely pathogenic, pathogenic and as a VUS by clinical laboratories in ClinVar. This alternative change has also been observed in one individual with an NF1-related condition in the literature (PMID: 31370276). (SP) 0807 - This variant has no previous evidence of pathogenicity. (I) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign - |
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Sep 15, 2024 | This sequence change falls in intron 3 of the NF1 gene. It does not directly change the encoded amino acid sequence of the NF1 protein. It affects a nucleotide within the consensus splice site. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with NF1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1699115). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. This variant disrupts the c.288+4A nucleotide in the NF1 gene. Other variant(s) that disrupt this nucleotide have been determined to be pathogenic (PMID: 31370276; internal data). This suggests that this nucleotide is clinically significant, and that variants that disrupt this position 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. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.