1-241857433-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_130398.4(EXO1):c.494A>G(p.Gln165Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: EXO1 NM_130398.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.20

Genes affected

EXO1 (HGNC:3511): (exonuclease 1) This gene encodes a protein with 5' to 3' exonuclease activity as well as an RNase H activity. It is similar to the Saccharomyces cerevisiae protein Exo1 which interacts with Msh2 and which is involved in mismatch repair and recombination. Alternative splicing of this gene results in three transcript variants encoding two different isoforms. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.825

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EXO1	NM_130398.4	c.494A>G	p.Gln165Arg	missense_variant	7/16	ENST00000366548.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EXO1	ENST00000366548.8	c.494A>G	p.Gln165Arg	missense_variant	7/16	1	NM_130398.4	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 14, 2021

The c.494A>G (p.Q165R) alteration is located in exon 5 (coding exon 4) of the EXO1 gene. This alteration results from a A to G substitution at nucleotide position 494, causing the glutamine (Q) at amino acid position 165 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.0
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D;T;D;.;T
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Uncertain	0.96	D
M_CAP	Benign	0.032	D
MetaRNN	Pathogenic	0.83	D;D;D;D;D
MetaSVM	Uncertain	0.15	D
MutationAssessor	Benign	1.9	M;.;M;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Uncertain	-3.0	D;D;D;D;D
REVEL	Uncertain	0.60
Sift	Uncertain	0.0040	D;D;D;D;D
Sift4G	Uncertain	0.0060	D;D;D;D;D
Polyphen		0.99	D;.;D;D;.
Vest4		0.76
MutPred		0.70		Loss of ubiquitination at K160 (P = 0.0694);.;Loss of ubiquitination at K160 (P = 0.0694);Loss of ubiquitination at K160 (P = 0.0694);.;
MVP		0.87
MPC		0.21
ClinPred		0.96	D
GERP RS		5.9
Varity_R		0.58
gMVP		0.83

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: chr1-242020735;