chr8-89978217-T-C

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3PP5

The NM_002485.5(NBN):c.584+3A>G variant causes a splice region, intron change. The variant allele was found at a frequency of 0.00000125 in 1,597,784 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 predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

NBN
NM_002485.5 splice_region, intron

Scores

Splicing: ADA: 0.9996

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:4

Conservation

PhyloP100: 5.98

Publications

0 publications found

Variant links:

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]

NBN Gene-Disease associations (from GenCC):

Nijmegen breakage syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, Myriad Women’s Health
rhabdomyosarcoma
Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
idiopathic aplastic anemia
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
prostate cancer
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
hereditary breast carcinoma
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

NBN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.

PP5

Variant 8-89978217-T-C is Pathogenic according to our data. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362. Variant chr8-89978217-T-C is described in CliVar as Conflicting_classifications_of_pathogenicity. Clinvar id is 142362.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NBN	NM_002485.5 link	c.584+3A>G		splice_region_variant, intron_variant	Intron 5 of 15	ENST00000265433.8	NP_002476.2	O60934

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NBN	ENST00000265433.8 link	c.584+3A>G		splice_region_variant, intron_variant	Intron 5 of 15	1	NM_002485.5	ENSP00000265433.4		O60934

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251122

AF XY:

0.00000737

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.92e-7

AC:

AN:

1445600

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

720344

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33202

American (AMR)

AF:

0.00

AC:

AN:

44692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26020

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39476

South Asian (SAS)

AF:

0.00

AC:

AN:

85830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53388

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5728

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1097448

Other (OTH)

AF:

0.00

AC:

AN:

59816

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74362

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41442

American (AMR)

AF:

0.0000655

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3462

East Asian (EAS)

AF:

0.00

AC:

AN:

5202

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Microcephaly, normal intelligence and immunodeficiency

Uncertain:3

Jun 25, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change falls in intron 5 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. This variant is present in population databases (rs587782407, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with NBN-related conditions. ClinVar contains an entry for this variant (Variation ID: 142362). 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 is not likely to affect RNA splicing. 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. -

Nov 07, 2021

Genome-Nilou Lab

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 28, 2021

Natera, Inc.

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Hereditary cancer-predisposing syndrome

Pathogenic:1

Dec 28, 2023

Ambry Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.584+3A>G intronic variant results from an A to G substitution 3 nucleotides after coding exon 5 in the NBN gene. This nucleotide position is highly conserved in available vertebrate species. In silico splice site analysis for this alteration is inconclusive; however RNA studies have demonstrated that this alteration results in abnormal splicing in the set of samples tested (Ambry internal data). Based on the majority of available evidence to date, this variant is likely to be pathogenic. -

not provided

Uncertain:1

Apr 27, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); Has not been previously published as pathogenic or benign to our knowledge; In silico analysis suggests this variant may impact gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown.; This variant is associated with the following publications: (PMID: 17576681, 9536098) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.32

CADD

Benign

(source)

DANN

Benign

0.94

PhyloP100

6.0

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.98

SpliceAI score (max)

0.26

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.26

Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over