chr8-89955326-T-G

Position:

chr8-89955326-T-G

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_002485.5(NBN):c.1354A>C(p.Thr452Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000131 in 1,613,856 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00068 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000075 ( 0 hom. )

Consequence

NBN
NM_002485.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:10

Conservation

PhyloP100: 0.351

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 links:

NBN (HGNC:):

NBN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008474678).

BP6

Variant 8-89955326-T-G is Benign according to our data. Variant chr8-89955326-T-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 142374.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=9, Uncertain_significance=5}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000677 (103/152222) while in subpopulation AFR AF= 0.00226 (94/41554). AF 95% confidence interval is 0.00189. There are 1 homozygotes in gnomad4. There are 54 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NBN	NM_002485.5 linkuse as main transcript	c.1354A>C	p.Thr452Pro	missense_variant	10/16	ENST00000265433.8	NP_002476.2	O60934

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NBN	ENST00000265433.8 linkuse as main transcript	c.1354A>C	p.Thr452Pro	missense_variant	10/16	1	NM_002485.5	ENSP00000265433.4		O60934

Frequencies

GnomAD3 genomes

AF:

0.000671

AC:

102

AN:

152104

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00224

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

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:

0.0000147

Gnomad OTH

AF:

0.000957

GnomAD3 exomes

AF:

0.000223

AC:

AN:

251218

Hom.:

AF XY:

0.000155

AC XY:

AN XY:

135776

show subpopulations

Gnomad AFR exome

AF:

0.00265

Gnomad AMR exome

AF:

0.000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000746

AC:

109

AN:

1461634

Hom.:

Cov.:

AF XY:

0.0000550

AC XY:

AN XY:

727118

show subpopulations

Gnomad4 AFR exome

AF:

0.00266

Gnomad4 AMR exome

AF:

0.000201

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.000677

AC:

103

AN:

152222

Hom.:

Cov.:

AF XY:

0.000725

AC XY:

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.00226

Gnomad4 AMR

AF:

0.000393

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000947

Alfa

AF:

0.000171

Hom.:

Bravo

AF:

0.000771

ESP6500AA

AF:

0.00340

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000296

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:10

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Jan 12, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 06, 2020	In silico analysis supports that this missense variant does not alter protein structure/function This variant is associated with the following publications: (PMID: 30564542, 27443514, 26976419, 25980754, 30309722) -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Aug 31, 2022	BP4 -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Sep 18, 2018	- -
Uncertain significance, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	The NBN p.Thr452Pro variant was identified in 2 of 1738 proband chromosomes (frequency: 0.001) from individuals or families with breast or endometrial cancer (Tung 2016, Ring 2016). The variant was also identified with one other NBN variant and a PALB2 variant, in one individual with primary male breast cancer and primary prostate cancer, though its significance was not conclusive (Kolli 2018). The variant was also identified in dbSNP (ID: rs141137543) as "With other allele", in ClinVar (classified as likely benign by GeneDx and Invitae; uncertain significance by Ambry Genetics, University of Chicago, Mendelics, EGL and ARUP Laboratories), LOVD 3.0 (classified as effect unknown by one submitter). The variant was identified in control databases in 72 of 276950 chromosomes at a frequency of 0.0003 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: African in 61 of 24010 chromosomes (freq: 0.003), Other in 1 of 6456 chromosomes (freq: 0.0002), Latino in 9 of 34394 chromosomes (freq: 0.0003), European Non-Finnish in 1 of 126548 chromosomes (freq: 0.000008); it was not observed in the Ashkenazi Jewish, East Asian, Finnish, and South Asian populations. The p.Thr452 residue is conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. The variant occurs outside of the splicing consensus sequence and 1 of 4 in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) predict a greater than 10% difference in splicing; this is not very predictive of pathogenicity. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -

not specified

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Apr 05, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 07, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Mar 04, 2024	- -

Hereditary cancer-predisposing syndrome

Uncertain:1Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Institute for Biomarker Research, Medical Diagnostic Laboratories, L.L.C.	Nov 15, 2022	- -
Likely benign, criteria provided, single submitter	curation	Sema4, Sema4	Aug 11, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Apr 07, 2020	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. -

Microcephaly, normal intelligence and immunodeficiency

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 07, 2021	- -

NBN-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 07, 2022

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Hereditary cancer

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Mendelics

Jan 23, 2024

- -

Hereditary breast ovarian cancer syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

National Health Laboratory Service, Universitas Academic Hospital and University of the Free State

Apr 19, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.37

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

T;T

Eigen

Benign

0.065

Eigen_PC

Benign

-0.021

FATHMM_MKL

Benign

0.53

LIST_S2

Benign

0.50

T;T

M_CAP

Benign

0.022

MetaRNN

Benign

0.0085

T;T

MetaSVM

Benign

-0.72

MutationAssessor

Uncertain

2.6

M;.

PrimateAI

Benign

0.39

PROVEAN

Benign

-1.3

N;N

REVEL

Benign

0.055

Sift

Uncertain

0.0070

D;D

Sift4G

Uncertain

0.021

D;D

Polyphen

0.97

D;.

Vest4

0.15

MVP

0.73

MPC

0.090

ClinPred

0.057

GERP RS

2.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.20

gMVP

0.21

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over