chr11-108326225-G-A

Position:

chr11-108326225-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PP3_StrongBP6

The NM_000051.4(ATM):c.6975G>A(p.Ala2325=) variant causes a splice region, synonymous change. The variant allele was found at a frequency of 0.0000359 in 1,613,700 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

ATM
NM_000051.4 splice_region, synonymous

Scores

Splicing: ADA: 1.000

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:9B:2

Conservation

PhyloP100: 4.81

Variant links:

Genes affected

ATM (HGNC:795): (ATM serine/threonine kinase) The protein encoded by this gene belongs to the PI3/PI4-kinase family. This protein is an important cell cycle checkpoint kinase that phosphorylates; thus, it functions as a regulator of a wide variety of downstream proteins, including tumor suppressor proteins p53 and BRCA1, checkpoint kinase CHK2, checkpoint proteins RAD17 and RAD9, and DNA repair protein NBS1. This protein and the closely related kinase ATR are thought to be master controllers of cell cycle checkpoint signaling pathways that are required for cell response to DNA damage and for genome stability. Mutations in this gene are associated with ataxia telangiectasia, an autosomal recessive disorder. [provided by RefSeq, Aug 2010]

ATM links:

C11orf65 (HGNC:28519): (chromosome 11 open reading frame 65) Predicted to be involved in negative regulation of mitochondrial fission and negative regulation of protein targeting to mitochondrion. Predicted to be located in cytosol and mitochondrial outer membrane. [provided by Alliance of Genome Resources, Apr 2022]

C11orf65 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BP6

Variant 11-108326225-G-A is Benign according to our data. Variant chr11-108326225-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 141676.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=8}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATM	NM_000051.4 linkuse as main transcript	c.6975G>A	p.Ala2325=	splice_region_variant, synonymous_variant	47/63	ENST00000675843.1	NP_000042.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ATM	ENST00000675843.1 linkuse as main transcript	c.6975G>A	p.Ala2325=	splice_region_variant, synonymous_variant	47/63		NM_000051.4	ENSP00000501606	P1

Frequencies

GnomAD3 genomes

AF:

0.0000527

AC:

AN:

151776

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000394

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:

0.000479

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251310

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135824

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.00

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000342

AC:

AN:

1461808

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

727206

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000378

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000527

AC:

AN:

151892

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74224

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.00

Gnomad4 OTH

AF:

0.000474

Bravo

AF:

0.000147

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:9Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Dec 27, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Feb 23, 2024	Located in the critical FAT domain (PMID: 23532176); Alters the last nucleotide of the exon and is predicted to destroy the splice donor site and result in aberrant splicing, although in the absence of functional evidence the actual effect of this sequence change is unknown; Not observed at significant frequency in large population cohorts (gnomAD); Observed in individuals with personal and/or family history of breast cancer, but also in unaffected controls (PMID: 35402282, 28779002, 33128190, 35264596); This variant is associated with the following publications: (PMID: 27149842, 28779002, 33128190, 35264596, 35402282, 36243179, 23532176) -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Dec 27, 2019	In the published literature, this variant has been reported in individuals affected with breast cancer (PMIDs: 28779002 (2017), 33128190 (2021), 35264596 (2022), 35402282 (2022)) and unaffected controls (PMID: 28779002 (2017)). The frequency of this variant in the general population, 0.00039 (6/15234 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using software algorithms for the prediction of the effect of nucleotide changes on ATM mRNA splicing yielded inconclusive findings . Based on the available information, we are unable to determine the clinical significance of this variant. -

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Nov 08, 2022	Variant summary: ATM c.6975G>A (p.Ala2325Ala) alters a conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. One computational tool predicts the variant abolishes a canonical 5' splicing donor site, and three predict the variant has no significant impact on splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 1.2e-05 in 251310 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.6975G>A has been reported in the literature in individuals affected with breast cancer (Gomes_2020, Abdel-Razeq_2022, Guindalini_2022). These reports do not provide unequivocal conclusions about association of the variant with Ataxia-Telangiectasia. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Eight ClinVar submitters have assessed the variant since 2014: two classified the variant as likely benign, five as uncertain significance, and one as likely pathogenic. Based on the evidence outlined above, the variant was classified as uncertain significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Jul 31, 2024	- -

Ataxia-telangiectasia syndrome

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 28, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mendelics	Dec 29, 2023	This ATM synonymous variant is located at a splice site, with a SpliceAI score of 0.85. In an internal analysis of 6362 Breast Cancer patients and 9128 controls, we found 15 carriers in cases and 10 in controls, yielding an odds-ratio of 2.2, p-value 0.054. -

Hereditary cancer-predisposing syndrome

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Feb 17, 2023	This synonymous variant alters the conserved G at the last nucleotide position of exon 47 of the ATM gene. Splice site prediction tools suggest this variant may have a significant impact on splicing. To our knowledge, functional studies have not been performed for this variant. This variant has been reported in individuals affected with breast cancer and in healthy controls (PMID: 28779002, 33128190, 35264596, 35402282). This variant has been identified in 3/251310 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Oct 11, 2019	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. -

ATM-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 06, 2024

The ATM c.6975G>A variant is not predicted to result in an amino acid change (p.=). This variant occurs at the last nucleotide of an exon and is predicted to interfere with splicing based on splicing prediction programs (SpliceAI, Jaganathan K, et al. 2019. PubMed ID: 30661751). This variant has been reported in individuals with breast cancer and/or ovarian cancer (Gomes et al. 2021. PubMed ID: 33128190; Abdel-Razeq et al. 2022. PubMed ID: 35402282) and has also been documented in controls (Supplementary Table 2 in Guindalini et al. 2022. PubMed ID: 35264596). This variant is reported in 0.0029% of alleles in individuals of Latino descent in gnomAD, and has conflicting interpretations regarding its pathogenicity in ClinVar, ranging from likely benign to uncertain (https://www.ncbi.nlm.nih.gov/clinvar/variation/141676). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Familial cancer of breast

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Jul 13, 2021

ACMG classification criteria: PP3 supporting -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.37

CADD

Benign

DANN

Benign

0.80

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.98

SpliceAI score (max)

0.85

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.85

Position offset: 0

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