11-108268496-A-T

Variant names:

• chr11-108268496-A-T
• rs786203175
• NM_000051.4:c.2725A>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000051.4(ATM):​c.2725A>T​(p.Thr909Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign 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. T909A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATM NM_000051.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 3.67
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• hereditary breast carcinoma

  Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics, ClinGen
• ataxia telangiectasia

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P, ClinGen, Laboratory for Molecular Medicine, Orphanet
• hereditary nonpolyposis colon cancer

  Inheritance: AD Classification: MODERATE, LIMITED Submitted by: ClinGen, Ambry Genetics
• prostate cancer

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• sarcoma

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• familial ovarian cancer

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• gastric carcinoma

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21600729).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000051.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATM	NM_000051.4	MANE Select	c.2725A>T	p.Thr909Ser	missense	Exon 18 of 63	NP_000042.3
	ATM	NM_001351834.2		c.2725A>T	p.Thr909Ser	missense	Exon 19 of 64	NP_001338763.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATM	ENST00000675843.1	MANE Select	c.2725A>T	p.Thr909Ser	missense	Exon 18 of 63	ENSP00000501606.1
	ATM	ENST00000452508.7	TSL:1	c.2725A>T	p.Thr909Ser	missense	Exon 19 of 64	ENSP00000388058.2
	ATM	ENST00000531525.3	TSL:1	c.2725A>T	p.Thr909Ser	missense	Exon 18 of 30	ENSP00000434327.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Ataxia-telangiectasia syndrome Uncertain:1

Oct 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 909 of the ATM protein (p.Thr909Ser). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ATM-related conditions. ClinVar contains an entry for this variant (Variation ID: 186728). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt ATM protein function with a negative predictive value of 95%. 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:1

Jun 05, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.T909S variant (also known as c.2725A>T), located in coding exon 17 of the ATM gene, results from an A to T substitution at nucleotide position 2725. The threonine at codon 909 is replaced by serine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.050	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	19
DANN	Benign	0.94
DEOGEN2	Benign	0.051	T
Eigen	Benign	-0.20
Eigen_PC	Benign	-0.033
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Benign	0.63	T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.22	T
MetaSVM	Benign	-0.93	T
MutationAssessor	Benign	1.7	L
PhyloP100		3.7
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	-0.58	N
REVEL	Benign	0.11
Sift	Benign	0.36	T
Sift4G	Benign	0.15	T
Polyphen		0.076	B
Vest4		0.48
MutPred		0.41		Gain of relative solvent accessibility (P = 0.0479)
MVP		0.83
MPC		0.15
ClinPred		0.62	D
GERP RS		4.8
Varity_R		0.13
gMVP		0.15
Mutation Taster		=68/32	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs786203175; hg19: chr11-108139223;