rs1555008221

Positions:

• chr11-94456288-A-C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BS2_Supporting

The NM_005591.4(MRE11):​c.1551T>G​(p.Asp517Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,460,324 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. 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. D517A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: MRE11 NM_005591.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.338

Genes affected

MRE11 (HGNC:7230): (MRE11 homolog, double strand break repair nuclease) This gene encodes a nuclear protein involved in homologous recombination, telomere length maintenance, and DNA double-strand break repair. By itself, the protein has 3' to 5' exonuclease activity and endonuclease activity. The protein forms a complex with the RAD50 homolog; this complex is required for nonhomologous joining of DNA ends and possesses increased single-stranded DNA endonuclease and 3' to 5' exonuclease activities. In conjunction with a DNA ligase, this protein promotes the joining of noncomplementary ends in vitro using short homologies near the ends of the DNA fragments. This gene has a pseudogene on chromosome 3. Alternative splicing of this gene results in two transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.049469918).
• BS2: High AC in GnomAdExome4 at 5 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MRE11	NM_005591.4	c.1551T>G	p.Asp517Glu	missense_variant	14/20	ENST00000323929.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MRE11	ENST00000323929.8	c.1551T>G	p.Asp517Glu	missense_variant	14/20	1	NM_005591.4	P3
MRE11	ENST00000323977.7	c.1551T>G	p.Asp517Glu	missense_variant	14/19	1
MRE11	ENST00000407439.7	c.1560T>G	p.Asp520Glu	missense_variant	14/20	2
MRE11	ENST00000393241.8	c.1551T>G	p.Asp517Glu	missense_variant	14/20	5		A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1460324 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 726566

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: 0.00000450

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 21, 2022

The p.D517E variant (also known as c.1551T>G), located in coding exon 13 of the MRE11A gene, results from a T to G substitution at nucleotide position 1551. The aspartic acid at codon 517 is replaced by glutamic acid, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Ataxia-telangiectasia-like disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 10, 2022

This sequence change replaces aspartic acid, which is acidic and polar, with glutamic acid, which is acidic and polar, at codon 517 of the MRE11A protein (p.Asp517Glu). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with MRE11A-related conditions. ClinVar contains an entry for this variant (Variation ID: 466432). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The glutamic acid amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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	0.069
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	15
DANN	Benign	0.91
DEOGEN2	Benign	0.060	T;.;.;.
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.60	D
LIST_S2	Benign	0.79	T;T;T;T
M_CAP	Benign	0.0093	T
MetaRNN	Benign	0.049	T;T;T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	1.1	L;.;L;.
MutationTaster	Benign	0.99	D;D;D;D
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-0.15	N;N;N;N
REVEL	Benign	0.13
Sift	Benign	0.61	T;T;T;T
Sift4G	Benign	0.66	T;T;T;T
Polyphen		0.0010	B;.;B;.
Vest4		0.14
MutPred		0.16		.;Loss of helix (P = 0.0376);.;.;
MVP		0.44
MPC		0.079
ClinPred		0.24	T
GERP RS		0.63
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.025
gMVP		0.067

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: rs1555008221; hg19: chr11-94189454;