11-108257577-T-G

Variant names:

• chr11-108257577-T-G
• rs1555075786
• NM_000051.4:c.2347T>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000051.4(ATM):​c.2347T>G​(p.Cys783Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATM NM_000051.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.70

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATM	NM_000051.4	c.2347T>G	p.Cys783Gly	missense_variant	Exon 15 of 63	ENST00000675843.1	NP_000042.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATM	ENST00000675843.1	c.2347T>G	p.Cys783Gly	missense_variant	Exon 15 of 63		NM_000051.4	ENSP00000501606.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Ataxia-telangiectasia syndrome Uncertain:1

Jul 19, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces cysteine with glycine at codon 783 of the ATM protein (p.Cys783Gly). The cysteine residue is highly conserved and there is a large physicochemical difference between cysteine and glycine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with ATM-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Benign	22
DANN	Benign	0.91
DEOGEN2	Benign	0.23	.;T;T
Eigen	Benign	0.17
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.67	T;T;.
M_CAP	Uncertain	0.13	D
MetaRNN	Uncertain	0.71	D;D;D
MetaSVM	Benign	-0.29	T
MutationAssessor	Uncertain	2.7	.;M;M
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-4.8	D;D;D
REVEL	Uncertain	0.48
Sift	Uncertain	0.015	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		0.43	.;B;B
Vest4		0.70, 0.67
MutPred		0.60		Loss of catalytic residue at M780 (P = 0.0414);Loss of catalytic residue at M780 (P = 0.0414);Loss of catalytic residue at M780 (P = 0.0414);
MVP		0.88
MPC		0.41
ClinPred		0.75	D
GERP RS		6.2
Varity_R		0.51
gMVP		0.50

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.19		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: rs1555075786; hg19: chr11-108128304;