chr3-142449468-T-A

Position:

• chr3-142449468-T-A

Variant summary

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

The NM_001184.4(ATR):​c.7896A>T​(p.Leu2632Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. 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. L2632V) 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: 0.253

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.7896A>T	p.Leu2632Phe	missense_variant	47/47	ENST00000350721.9
ATR	NM_001354579.2	c.7704A>T	p.Leu2568Phe	missense_variant	46/46
ATR	XM_011512924.2	c.7902A>T	p.Leu2634Phe	missense_variant	47/47
ATR	XM_011512925.2	c.7710A>T	p.Leu2570Phe	missense_variant	46/46

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATR	ENST00000350721.9	c.7896A>T	p.Leu2632Phe	missense_variant	47/47	1	NM_001184.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251424 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135890

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: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 30, 2023

The p.L2632F variant (also known as c.7896A>T), located in coding exon 47 of the ATR gene, results from an A to T substitution at nucleotide position 7896. The leucine at codon 2632 is replaced by phenylalanine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.21	T
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Uncertain	0.93	D
M_CAP	Benign	0.044	D
MetaRNN	Uncertain	0.63	D
MetaSVM	Benign	-0.34	T
MutationAssessor	Benign	1.6	L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.76	T
PROVEAN	Benign	-1.2	N
REVEL	Uncertain	0.52
Sift	Benign	0.19	T
Sift4G	Benign	0.082	T
Polyphen		1.0	D
Vest4		0.67
MutPred		0.61		Gain of helix (P = 0.1736);
MVP		0.94
MPC		1.7
ClinPred		0.65	D
GERP RS		1.7
Varity_R		0.15
gMVP		0.65

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: rs1489068438; hg19: chr3-142168310;