rs200833729

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong

The NM_022168.4(IFIH1):c.2597C>T(p.Pro866Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00032 in 1,611,814 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P866S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00028 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00032 ( 6 hom. )

Consequence

IFIH1
NM_022168.4 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.131

Variant links:

Genes affected

IFIH1 (HGNC:18873): (interferon induced with helicase C domain 1) IFIH1 encodes MDA5 which is an intracellular sensor of viral RNA that triggers the innate immune response. Sensing RNA length and secondary structure, MDA5 binds dsRNA oligonucleotides with a modified DExD/H-box helicase core and a C-terminal domain, thus leading to a proinflammatory response that includes interferons. It has been shown that Coronaviruses (CoVs) as well as various other virus families, are capable of evading the MDA5-dependent interferon response, thus impeding the activation of the innate immune response to infection. MDA5 has also been shown to play an important role in enhancing natural killer cell function in malaria infection. In addition to its protective role in antiviral responses, MDA5 has been implicated in autoimmune and autoinflammatory diseases such as type 1 diabetes, systemic lupus erythematosus, and Aicardi-Goutieres syndrome[provided by RefSeq, Jul 2020]

IFIH1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.031043172).

BP6

Variant 2-162272245-G-A is Benign according to our data. Variant chr2-162272245-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 541773.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-162272245-G-A is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IFIH1	NM_022168.4 linkuse as main transcript	c.2597C>T	p.Pro866Leu	missense_variant	13/16	ENST00000649979.2
IFIH1	XM_047445407.1 linkuse as main transcript	c.1880C>T	p.Pro627Leu	missense_variant	12/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IFIH1	ENST00000649979.2 linkuse as main transcript	c.2597C>T	p.Pro866Leu	missense_variant	13/16		NM_022168.4	P1	Q9BYX4-1

Frequencies

GnomAD3 genomes

AF:

0.000270

AC:

AN:

152072

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000524

Gnomad ASJ

AF:

0.00144

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.000398

AC:

AN:

248756

Hom.:

AF XY:

0.000476

AC XY:

AN XY:

134478

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000497

Gnomad ASJ exome

AF:

0.000799

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000330

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000516

Gnomad OTH exome

AF:

0.000991

GnomAD4 exome

AF:

0.000325

AC:

474

AN:

1459624

Hom.:

Cov.:

AF XY:

0.000353

AC XY:

256

AN XY:

726014

show subpopulations

Gnomad4 AFR exome

AF:

0.000240

Gnomad4 AMR exome

AF:

0.000517

Gnomad4 ASJ exome

AF:

0.000844

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000256

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000257

Gnomad4 OTH exome

AF:

0.000647

GnomAD4 genome

AF:

0.000276

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.000363

AC XY:

AN XY:

74414

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.00144

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000280

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.000468

Hom.:

Bravo

AF:

0.000249

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000396

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 10, 2023

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Apr 01, 2020

- -

Aicardi-Goutieres syndrome 7;C4225427:Singleton-Merten syndrome 1

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 22, 2024

- -

IFIH1-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 24, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.48

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.29

T;T;.

Eigen

Uncertain

0.20

Eigen_PC

Benign

0.19

FATHMM_MKL

Benign

0.74

M_CAP

Benign

0.012

MetaRNN

Benign

0.031

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.9

L;L;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.31

Polyphen

0.94

P;P;.

Vest4

0.30

MVP

0.52

MPC

0.032

ClinPred

0.11

GERP RS

4.9

Varity_R

0.15

gMVP

0.47

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over