3-142449452-G-A

Position:

• chr3-142449452-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_001184.4(ATR):​c.7912C>T​(p.Leu2638Phe) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. L2638P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ATR NM_001184.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.69

Genes affected

ATR (HGNC:882): (ATR serine/threonine kinase) The protein encoded by this gene is a serine/threonine kinase and DNA damage sensor, activating cell cycle checkpoint signaling upon DNA stress. The encoded protein can phosphorylate and activate several proteins involved in the inhibition of DNA replication and mitosis, and can promote DNA repair, recombination, and apoptosis. This protein is also important for fragile site stability and centrosome duplication. Defects in this gene are a cause of Seckel syndrome 1. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ATR. . Gene score misZ 4.3648 (greater than the threshold 3.09). Trascript score misZ 7.1274 (greater than threshold 3.09). GenCC has associacion of gene with sarcoma, Seckel syndrome, familial cutaneous telangiectasia and oropharyngeal predisposition cancer syndrome, Seckel syndrome 1.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATR	NM_001184.4	c.7912C>T	p.Leu2638Phe	missense_variant	47/47	ENST00000350721.9
ATR	NM_001354579.2	c.7720C>T	p.Leu2574Phe	missense_variant	46/46
ATR	XM_011512924.2	c.7918C>T	p.Leu2640Phe	missense_variant	47/47
ATR	XM_011512925.2	c.7726C>T	p.Leu2576Phe	missense_variant	46/46

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATR	ENST00000350721.9	c.7912C>T	p.Leu2638Phe	missense_variant	47/47	1	NM_001184.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 27, 2023

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 2638 of the ATR protein (p.Leu2638Phe). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ATR-related conditions. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.31
BayesDel_addAF	Uncertain	0.033	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.11	T
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.93	D
M_CAP	Benign	0.020	T
MetaRNN	Uncertain	0.49	T
MetaSVM	Benign	-0.37	T
MutationAssessor	Benign	0.42	N
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-1.2	N
REVEL	Uncertain	0.38
Sift	Benign	0.20	T
Sift4G	Benign	0.15	T
Polyphen		0.97	D
Vest4		0.22
MutPred		0.50		Loss of catalytic residue at L2638 (P = 0.0295);
MVP		0.69
MPC		1.6
ClinPred		0.86	D
GERP RS		5.5
Varity_R		0.12
gMVP		0.57

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-142168294;