rs1555117084

Variant names:

• chr11-108321309-A-AAGTGGAAGAGATGTGT
• rs1555117084
• NM_000051.4:c.6463_6478dupGTGGAAGAGATGTGTA

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PP5_Moderate

The NM_000051.4(ATM):​c.6463_6478dupGTGGAAGAGATGTGTA​(p.Lys2160SerfsTer6) variant causes a frameshift, stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. K2160K) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATM NM_000051.4 frameshift, stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 2.08
• 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]

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]

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PP5: Variant 11-108321309-A-AAGTGGAAGAGATGTGT is Pathogenic according to our data. Variant chr11-108321309-A-AAGTGGAAGAGATGTGT is described in ClinVar as Pathogenic. ClinVar VariationId is 407653.Status of the report is criteria_provided_single_submitter, 1 stars.

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.6463_6478dupGTGGAAGAGATGTGTA	p.Lys2160SerfsTer6	frameshift stop_gained	Exon 45 of 63	NP_000042.3
	ATM	NM_001351834.2		c.6463_6478dupGTGGAAGAGATGTGTA	p.Lys2160SerfsTer6	frameshift stop_gained	Exon 46 of 64	NP_001338763.1
	C11orf65	NM_001330368.2		c.641-12254_641-12239dupACACATCTCTTCCACT		intron	N/A	NP_001317297.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATM	ENST00000675843.1	MANE Select	c.6463_6478dupGTGGAAGAGATGTGTA	p.Lys2160SerfsTer6	frameshift stop_gained	Exon 45 of 63	ENSP00000501606.1
	ATM	ENST00000452508.7	TSL:1	c.6463_6478dupGTGGAAGAGATGTGTA	p.Lys2160SerfsTer6	frameshift stop_gained	Exon 46 of 64	ENSP00000388058.2
	ATM	ENST00000527805.6	TSL:1	n.*1527_*1542dupGTGGAAGAGATGTGTA		non_coding_transcript_exon	Exon 43 of 61	ENSP00000435747.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Ataxia-telangiectasia syndrome Pathogenic:1

Oct 25, 2016

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change inserts 16 nucleotide in exon 45 of the ATM mRNA (c.6463_6478dup16), causing a frameshift at codon 2160. This creates a premature translational stop signal (p.Lys2160Serfs*6) and is expected to result in an absent or disrupted protein product. While this particular variant has not been reported in the literature, loss-of-function variants in ATM are known to be pathogenic (PMID: 10817650, 19781682). For these reasons, this variant has been classified as Pathogenic.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.1
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs1555117084; hg19: chr11-108192036;