Genetic Variant IFNGR2:p.Thr168Ile (chr21-33426974-C-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 6P and 2B. PM1PM2PM5BP4_Moderate

The NM_005534.4(IFNGR2):c.503C>T(p.Thr168Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,306 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T168N) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

IFNGR2
NM_005534.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.461

Variant links:

Genes affected

IFNGR2 (HGNC:5440): (interferon gamma receptor 2) This gene (IFNGR2) encodes the non-ligand-binding beta chain of the gamma interferon receptor. Human interferon-gamma receptor is a heterodimer of IFNGR1 and IFNGR2. Defects in IFNGR2 are a cause of mendelian susceptibility to mycobacterial disease (MSMD), also known as familial disseminated atypical mycobacterial infection. MSMD is a genetically heterogeneous disease with autosomal recessive, autosomal dominant or X-linked inheritance. [provided by RefSeq, Jul 2008]

IFNGR2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM1

In a domain Fibronectin type-III 2 (size 98) in uniprot entity INGR2_HUMAN there are 4 pathogenic changes around while only 1 benign (80%) in NM_005534.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr21-33426974-C-A is described in Lovd as [Pathogenic].

BP4

Computational evidence support a benign effect (MetaRNN=0.078492135).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IFNGR2	NM_005534.4 link	c.503C>T	p.Thr168Ile	missense_variant	Exon 4 of 7	ENST00000290219.11	NP_005525.2
IFNGR2	NM_001329128.2 link	c.560C>T	p.Thr187Ile	missense_variant	Exon 5 of 8		NP_001316057.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IFNGR2	ENST00000290219.11 link	c.503C>T	p.Thr168Ile	missense_variant	Exon 4 of 7	1	NM_005534.4	ENSP00000290219.5		P38484

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461306

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726992

show subpopulations

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.69

CADD

Benign

0.065

DANN

Benign

0.92

DEOGEN2

Benign

0.085

T;.;.

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.022

LIST_S2

Benign

0.50

T;T;T

M_CAP

Benign

0.0013

MetaRNN

Benign

0.078

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

L;.;.

PrimateAI

Benign

0.31

PROVEAN

Benign

-1.1

N;N;N

REVEL

Benign

0.020

Sift

Benign

0.20

T;T;T

Sift4G

Benign

0.17

T;T;T

Polyphen

0.040

B;B;.

Vest4

0.084

MutPred

0.41

.;Loss of glycosylation at S188 (P = 0.1013);.;

MVP

0.39

MPC

0.67

ClinPred

0.12

GERP RS

-8.0

Varity_R

0.18

gMVP

0.20

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over