11-108347318-A-G

Position:

• chr11-108347318-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The NM_000051.4(ATM):​c.8624A>G​(p.Asn2875Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,459,518 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N2875H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ATM NM_000051.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:5
• Conservation: PhyloP100: 8.84

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 Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a mutagenesis_site Loss of kinase activity. (size 0) in uniprot entity ATM_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.951

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATM	NM_000051.4	c.8624A>G	p.Asn2875Ser	missense_variant	59/63	ENST00000675843.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATM	ENST00000675843.1	c.8624A>G	p.Asn2875Ser	missense_variant	59/63		NM_000051.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250406 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135378

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.00000886

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1459518 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 726214

Gnomad4 AFR exome AF: 0.0000299

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: 9.01e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Ataxia-telangiectasia syndrome Uncertain:2

Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Dec 22, 2023	This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 2875 of the ATM protein (p.Asn2875Ser). This variant is present in population databases (rs587782451, gnomAD 0.0009%). This missense change has been observed in individual(s) with ataxia telangiectasia, colorectal cancer, and/or familial breast cancer (PMID: 19440741, 30303537, 30730459). ClinVar contains an entry for this variant (Variation ID: 142418). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -

Hereditary cancer-predisposing syndrome Uncertain:2

Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Jul 26, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jan 23, 2024	The p.N2875S variant (also known as c.8624A>G), located in coding exon 58 of the ATM gene, results from an A to G substitution at nucleotide position 8624. The asparagine at codon 2875 is replaced by serine, an amino acid with highly similar properties. This variant was reported in a compound heterozygous state with a frameshift mutation in a patient diagnosed with ataxia telangiectasia, however, phase was not determined (Anheim, M. Neurogenetics. 2010 Feb;11(1):1-12). This alteration has been identified in cohorts of breast and colon cancer patients (Tavtigian SV et al. Am J Hum Genet. 2009 Oct;85:427-46; Girard E et al. Int J Cancer. 2019 04;144:1962-1974; You YN et al. Dis Colon Rectum. 2019 04;62:429-437). Based on internal structural analysis, this alteration eliminates a residue that is critical for binding of the MgATP substrate and therefore impairs its catalytic activity (Gerlits O et al. J. Biol. Chem., 2015 Jun;290:15538-48). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be inconclusive by in silico analyses. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 06, 2020

Not observed at a significant frequency in large population cohorts (Lek 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Observed in individuals with breast and colon cancers (Girard 2019, You 2019); Observed with a nonsense variant in an individual with ataxia telangiectasia, but it is not known whether the variants occurred on the same (in cis) or on different (in trans) chromosomes (Anheim 2010); This variant is associated with the following publications: (PMID: 27304073, 30730459, 30303537, 19440741, 25232094) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.66	D;D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.94
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Pathogenic	0.99	D;.
M_CAP	Pathogenic	0.59	D
MetaRNN	Pathogenic	0.95	D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.8	H;H
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-4.3	D;D
REVEL	Pathogenic	0.90
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.97
MutPred		0.75		Loss of catalytic residue at N2875 (P = 0.0631);Loss of catalytic residue at N2875 (P = 0.0631);
MVP		0.99
MPC		0.52
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.90
gMVP		0.96

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: rs587782451; hg19: chr11-108218045; COSMIC: COSV53726848;