11-108229171-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_000051.4(ATM):c.186-7C>T variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00098 in 1,607,836 control chromosomes in the GnomAD database, including 20 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0051 (9 hom., cov: 33)
  • Exomes 𝑓: 0.00055 (11 hom.)
• Consequence: ATM NM_000051.4 splice_region, splice_polypyrimidine_tract, intron
• Scores: Splicing: ADA: 0.00007595
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:21
• Conservation: PhyloP100: 0.249

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.67).
• BP6: Variant 11-108229171-C-T is Benign according to our data. Variant chr11-108229171-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 135737.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-108229171-C-T is described in Lovd as [Benign]. Variant chr11-108229171-C-T is described in Lovd as [Likely_benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00507 (771/152054) while in subpopulation AFR AF= 0.0177 (736/41468). AF 95% confidence interval is 0.0167. There are 9 homozygotes in gnomad4. There are 354 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd at 9 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATM	NM_000051.4	c.186-7C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000675843.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATM	ENST00000675843.1	c.186-7C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant			NM_000051.4	P1

Frequencies

GnomAD3 genomes AF: 0.00507 AC: 771 AN: 151936 Hom.: 9 Cov.: 33

Gnomad AFR AF: 0.0178

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00158

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000415

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00287

GnomAD3 exomes AF: 0.00124 AC: 303 AN: 243718 Hom.: 2 AF XY: 0.000907 AC XY: 120 AN XY: 132238

Gnomad AFR exome AF: 0.0181

Gnomad AMR exome AF: 0.000708

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000101

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000182

Gnomad OTH exome AF: 0.000503

GnomAD4 exome AF: 0.000553 AC: 805 AN: 1455782 Hom.: 11 Cov.: 32 AF XY: 0.000479 AC XY: 347 AN XY: 723750

Gnomad4 AFR exome AF: 0.0210

Gnomad4 AMR exome AF: 0.000747

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000470

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000451

Gnomad4 OTH exome AF: 0.00105

GnomAD4 genome AF: 0.00507 AC: 771 AN: 152054 Hom.: 9 Cov.: 33 AF XY: 0.00476 AC XY: 354 AN XY: 74302

Gnomad4 AFR AF: 0.0177

Gnomad4 AMR AF: 0.00157

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000415

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00284

Alfa AF: 0.00245 Hom.: 2

Bravo AF: 0.00597

Asia WGS AF: 0.000867 AC: 3 AN: 3476

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:21

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:9

Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Oct 03, 2016	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 11, 2013	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Feb 10, 2020	- -
Benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Dec 19, 2018	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Feb 06, 2024	- -

Ataxia-telangiectasia syndrome Benign:3

Benign, criteria provided, single submitter	clinical testing	Invitae	Feb 01, 2024	- -
Benign, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Mar 25, 2016	Variant summary: The c.186-7C>T variant affects a non-conserved intronic nucleotide. Mutation taster predicts benign outcome for this variant. 5/5 programs in Alamut predict no significant effect on RNA splicing sites. ESE finder predicts that this variant may affect ESE site of SRp40. However, these predictions are not validated by experimental studies yet. This variant is found in 149/83742 control chromosomes, predominantly observed in African subpopulation in ExAC with observed MAF of 0.01887 (139/7368 chr, 1 homozygote), This frequency exceeds the maximal expected frequency of a pathogenic allele (0.0005), suggesting this variant is a benign polymorphism especially for Africans. This variant has been reported in multiple pts with different kinds of cancers (including BrC, T-ALL, AML, LS associated cancer, etc.) without strong evidence for causality. In addition, two clinical laboratories via ClinVar classified this variant as benign, without evidence to independently evaluate. Taken together, this variant was classified as Benign. -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Sep 18, 2023	- -

Hereditary cancer-predisposing syndrome Benign:2

Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 06, 2016	This alteration is classified as 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. -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Apr 13, 2015	- -

Breast and/or ovarian cancer Benign:1

Benign, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Feb 17, 2023

- -

Carcinoma of colon Benign:1

Benign, no assertion criteria provided

clinical testing

Department of Pathology and Laboratory Medicine, Sinai Health System

-

The ATM c.186-7C>T variant was identified in 4 of 2730 proband chromosomes (frequency: 0.00146) from individuals or families with Lynch syndrome (Yorczyk 2015, Yurgelun 2015). The variant was also identified in dbSBP (ID: rs55674039) as “With Benign allele,” ClinVar (as benign by GeneDx and Invitae), and Clinvitae (as benign) databases. The variant was not identified in Cosmic, MutDB, LOVD 3.0, ATM-LOVD databases. The variant was identified in control databases in 438 of 270788 chromosomes at a frequency of 0.001618 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Consortium Feb 27, 2017). The variant was identified in the African population at a frequency greater than 1% in 404 (4 homozygous) of 23450 chromosomes (freq: 0.017), and at lower frequencies in the following populations: Other in 3 of 6358 chromosomes (freq. 0.00047), Latino in 24 of 33868 chromosomes (freq. 0.0007), European (Non-Finnish) in 3 of 123042 chromosomes (freq. 0.00002), and South Asian in 4 of 29908 chromosomes (freq. 0.0001), increasing the likelihood this could be a low frequency benign variant. The c.186-7C>T variant is located in the 3' splice region but does not affect the invariant -1 and -2 positions. However, positions -3 and -5 to -12 are part of the splicing consensus sequence and variants involving these positions sometimes affect splicing. However, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information this variant meets our laboratory's criteria to be classified as benign. -

Familial cancer of breast Benign:1

Benign, criteria provided, single submitter

clinical testing

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Jul 07, 2023

- -

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
BayesDel_noAF	Benign	-0.67
Cadd	Benign	7.5
Dann	Benign	0.77

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000076
dbscSNV1_RF	Benign	0.014
SpliceAI score (max)		0.040		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

Other links and lift over

dbSNP: rs55674039; hg19: chr11-108099898; COSMIC: COSV104592386; COSMIC: COSV104592386;