Genetic Variant NM_001007561.3:c.1798G>A (chr19-43592100-C-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001007561.3(IRGQ):c.1798G>A(p.Val600Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,070 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

IRGQ
NM_001007561.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.08

Publications

0 publications found

Variant links:

Genes affected

IRGQ (HGNC:24868): (immunity related GTPase Q) Predicted to enable GTP binding activity. [provided by Alliance of Genome Resources, Apr 2022]

IRGQ links:

ENSG00000268361 (HGNC:):

ENSG00000268361 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3009683).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IRGQ	NM_001007561.3 link	c.1798G>A	p.Val600Ile	missense_variant	Exon 3 of 3	ENST00000422989.6	NP_001007562.1	Q8WZA9
IRGQ	NM_001388309.1 link	c.1798G>A	p.Val600Ile	missense_variant	Exon 3 of 3		NP_001375238.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
IRGQ	ENST00000422989.6 link	c.1798G>A	p.Val600Ile	missense_variant	Exon 3 of 3	5	NM_001007561.3	ENSP00000387535.1	Q8WZA9
IRGQ	ENST00000602269.2 link	c.1798G>A	p.Val600Ile	missense_variant	Exon 2 of 2	1		ENSP00000472250.1	Q8WZA9
ENSG00000268361	ENST00000594374.1 link	c.168+768G>A		intron_variant	Intron 1 of 2	3		ENSP00000472698.1	M0R2N6
IRGQ	ENST00000601520.1 link	n.251+657G>A		intron_variant	Intron 1 of 1	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00

AC:

AN:

244718

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1460070

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726364

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44706

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26094

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86214

European-Finnish (FIN)

AF:

0.0000192

AC:

AN:

52056

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111710

Other (OTH)

AF:

0.00

AC:

AN:

60350

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.013624), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.392

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 17, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1798G>A (p.V600I) alteration is located in exon 3 (coding exon 2) of the IRGQ gene. This alteration results from a G to A substitution at nucleotide position 1798, causing the valine (V) at amino acid position 600 to be replaced by an isoleucine (I). 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

0.24

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.53

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.010

T;T

Eigen

Uncertain

0.28

Eigen_PC

Benign

0.19

FATHMM_MKL

Benign

0.48

LIST_S2

Benign

0.59

T;.

M_CAP

Benign

0.016

MetaRNN

Benign

0.30

T;T

MetaSVM

Benign

-0.84

MutationAssessor

Benign

1.6

L;L

PhyloP100

1.1

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

0.070

N;.

REVEL

Benign

0.16

Sift

Benign

0.16

T;.

Sift4G

Benign

0.30

T;T

Polyphen

1.0

D;D

Vest4

0.11

MutPred

0.46

Gain of catalytic residue at L605 (P = 0.0317);Gain of catalytic residue at L605 (P = 0.0317);

MVP

0.43

ClinPred

0.67

GERP RS

4.9

Varity_R

0.060

gMVP

0.18

Mutation Taster

=85/15

polymorphism

(source)

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

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NM_001007561.3:c.1798G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over