rs730881306

Positions:

• chr11-108345733-CTATT-C

Variant summary

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

The NM_000051.4(ATM):​c.8419-7_8419-4delTTTA variant causes a splice region, intron change. The variant allele was found at a frequency of 0.00000128 in 1,567,368 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: ATM NM_000051.4 splice_region, intron
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7 B:1
• Conservation: PhyloP100: 4.44

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]

ATM (HGNC:):

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/exons	MANE	Protein	UniProt
ATM	NM_000051.4	c.8419-7_8419-4delTTTA		splice_region_variant, intron_variant		ENST00000675843.1	NP_000042.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ATM	ENST00000675843.1	c.8419-7_8419-4delTTTA		splice_region_variant, intron_variant			NM_000051.4	ENSP00000501606.1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151944 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000656

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 7.07e-7 AC: 1 AN: 1415424 Hom.: 0 AF XY: 0.00000142 AC XY: 1 AN XY: 705376

Gnomad4 AFR exome AF: 0.00

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: 9.28e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151944 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74194

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000656

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000113

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:7 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:3

Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Feb 02, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Aug 15, 2022	This variant removes 4 nucleotides at the +4 to +7 positions in the intron 57 acceptor region of the ATM gene. Splice site prediction tools predict that this variant may have a significant impact on RNA splicing. To our knowledge, RNA analysis studies have not been reported for this variant. This variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 01, 2024	The c.8419-7_8419-4delTTTA intronic variant, located in intron 56 of the ATM gene, results from a deletion of 4 nucleotides within intron 56 of the ATM gene. This nucleotide region is well conserved in available vertebrate species. In silico splice site analysis for this alteration is inconclusive; however, direct evidence is insufficient at this time (Ambry internal data). Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Sep 08, 2014	This variant is denoted ATM c.8419-(7_4)delTTTA or IVS57-(7_4)delTTTA and consists of a deletion of four nucleotides at the -4 to -7 position in intron 57 of the ATM gene. The normal sequence with the bases that are deleted in brackets is tcta[delTTTA]aagG. Multiple in silico models predict this variant to weaken or destroy the nearby natural acceptor site, and to possibly cause abnormal gene splicing. This variant has not, to our knowledge, been published in the literature as pathogenic or benign. The nucleotides that are deleted are moderately conserved across species. Based on currently available information, it is unclear whether ATM c.8419-(7_4)delTTTA is pathogenic or benign. We consider it to be a variant of uncertain significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Oct 03, 2023	- -

Ataxia-telangiectasia syndrome Uncertain:1 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 02, 2024	- -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 29, 2020	- -

ATM-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 26, 2024

The ATM c.8419-7_8419-4delTTTA variant is predicted to result in an intronic deletion. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. This variant has conflicting interpretations regarding its pathogenicity in ClinVar, ranging from uncertain significance to likely benign (https://www.ncbi.nlm.nih.gov/clinvar/variation/181877/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.28		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.28		Position offset: 10

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

Publications

LitVar

Other links and lift over

dbSNP: rs730881306; hg19: chr11-108216460;