8-89970369-G-A
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Variant summary
Our verdict is Benign. Variant got -11 ACMG points: 2P and 13B. PM2BP4_StrongBP6_Very_StrongBP7
The NM_002485.5(NBN):c.891C>T(p.Leu297=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000688 in 1,453,774 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 Likely benign (★★).
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 6.9e-7 ( 0 hom. )
Consequence
NBN
NM_002485.5 synonymous
NM_002485.5 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -0.327
Genes affected
NBN (HGNC:7652): (nibrin) Mutations in this gene are associated with Nijmegen breakage syndrome, an autosomal recessive chromosomal instability syndrome characterized by microcephaly, growth retardation, immunodeficiency, and cancer predisposition. The encoded protein is a member of the MRE11/RAD50 double-strand break repair complex which consists of 5 proteins. This gene product is thought to be involved in DNA double-strand break repair and DNA damage-induced checkpoint activation. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -11 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.67).
BP6
Variant 8-89970369-G-A is Benign according to our data. Variant chr8-89970369-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 485926.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BP7
Synonymous conserved (PhyloP=-0.327 with no splicing effect.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| NBN | NM_002485.5 | c.891C>T | p.Leu297= | synonymous_variant | 7/16 | ENST00000265433.8 | NP_002476.2 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| NBN | ENST00000265433.8 | c.891C>T | p.Leu297= | synonymous_variant | 7/16 | 1 | NM_002485.5 | ENSP00000265433 | P1 |
Frequencies
GnomAD3 genomes
GnomAD3 genomes
Cov.:
32
GnomAD4 exome AF: 6.88e-7 AC: 1AN: 1453774Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0AN XY: 723932
GnomAD4 exome
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30
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GnomAD4 genome
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Likely benign
Submissions summary: Benign:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Microcephaly, normal intelligence and immunodeficiency Benign:1
| Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Aug 14, 2023 | - - |
Hereditary cancer-predisposing syndrome Benign:1
| Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 08, 2017 | This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. - |
Computational scores
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Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
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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