8-89982718-A-T
Variant summary
Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong
The NM_002485.5(NBN):c.171+4T>A variant causes a splice donor region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,459,762 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Consequence
NM_002485.5 splice_donor_region, intron
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -2 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
NBN | NM_002485.5 | c.171+4T>A | splice_donor_region_variant, intron_variant | ENST00000265433.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
NBN | ENST00000265433.8 | c.171+4T>A | splice_donor_region_variant, intron_variant | 1 | NM_002485.5 | P1 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD4 exome AF: 0.00000137 AC: 2AN: 1459762Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1AN XY: 726374
GnomAD4 genome Cov.: 33
ClinVar
Submissions by phenotype
Microcephaly, normal intelligence and immunodeficiency Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 26, 2021 | This sequence change falls in intron 2 of the NBN gene. It does not directly change the encoded amino acid sequence of the NBN protein. It affects a nucleotide within the consensus splice site of the intron. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with NBN-related conditions. Nucleotide substitutions within 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 is not likely to affect RNA splicing, but this prediction has not been confirmed by published transcriptional studies. 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. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 27, 2024 | The c.171+4T>A intronic variant results from a T to A substitution 4 nucleotides after coding exon 2 in the NBN gene. This nucleotide position is not well conserved in available vertebrate species. In silico splice site analysis predicts that this alteration will not have any significant effect on splicing. Based on the available evidence, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.