chr11-108343322-GATAC-G

Position:

• chr11-108343322-GATAC-G

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000051.4(ATM):​c.8371_8374del​(p.Tyr2791GlyfsTer14) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,738 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ATM NM_000051.4 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 7.68

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]

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]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-108343322-GATAC-G is Pathogenic according to our data. Variant chr11-108343322-GATAC-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 418047.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATM	NM_000051.4	c.8371_8374del	p.Tyr2791GlyfsTer14	frameshift_variant	57/63	ENST00000675843.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATM	ENST00000675843.1	c.8371_8374del	p.Tyr2791GlyfsTer14	frameshift_variant	57/63		NM_000051.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461738 Hom.: 0 AF XY: 0.00000138 AC XY: 1 AN XY: 727172

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Oct 25, 2021	This variant deletes 4 nucleotides in exon 57 of the ATM gene, creating a frameshift and premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been observed in individuals affected with breast cancer (PMID: 26182300) and pancreatic cancer (Color Health internal data). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Loss of ATM function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Ambry Genetics	Mar 21, 2024	The c.8371_8374delTACA pathogenic mutation, located in coding exon 56 of the ATM gene, results from a deletion of 4 nucleotides at nucleotide positions 8371 to 8374, causing a translational frameshift with a predicted alternate stop codon (p.Y2791Gfs*14). In a study of patients with a personal and/or family histories that were concerning for Hereditary Diffuse Gastric Cancer syndrome, this variant was been observed in a patient with breast cancer at age 59, who also had a family history of pancreatic and other cancers (Hansford S et al. JAMA Oncol, 2015 Apr;1:23-32). This variant was also reported in a patient diagnosed with pancreatic cancer under the age of fifty (Hutchings D et al. Mod Pathol, 2019 12;32:1806-1813). This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

Familial cancer of breast Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Feb 01, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Feb 01, 2024	This variant is considered pathogenic. This variant creates a frameshift predicted to result in premature protein truncation. -

Ataxia-telangiectasia syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 06, 2023

This sequence change creates a premature translational stop signal (p.Tyr2791Glyfs*14) in the ATM gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ATM are known to be pathogenic (PMID: 23807571, 25614872). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with breast cancer and suspected Lynch syndrome (PMID: 25980754, 26182300). This variant is also known as c.8369GATAC>G. ClinVar contains an entry for this variant (Variation ID: 418047). For these reasons, this variant has been classified as Pathogenic. -

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Sep 18, 2017

This deletion of four nucleotides in ATM is denoted c.8371_8374delTACA at the cDNA level and p.Tyr2791GlyfsX14 (Y2791GfsX14) at the protein level. The normal sequence, with the bases that are deleted in brackets, is AAGA[delTACA]GGCC. The deletion causes a frameshift which changes a Tyrosine to a Glycine at codon 2791, and creates a premature stop codon at position 14 of the new reading frame. This variant is predicted to cause loss of normal protein function through either protein truncation or nonsense-mediated mRNA decay. ATM c.8371_8374delTACA, also published as ATM c.8369GATAC>G using alternate nomenclature, has been observed in one individual with breast cancer and a strong family history of gastric cancer as well as in one individual with a Lynch syndrome-associated cancer and/or polyps (Hansford 2015, Yurgelun 2015). Based on the currently available information, we consider this deletion to be a likely pathogenic variant. -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs1064793046; hg19: chr11-108214049;