2-162268127-T-G
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Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_022168.4(IFIH1):c.2767A>C(p.Ile923Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. I923V) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 32)
Consequence
IFIH1
NM_022168.4 missense
NM_022168.4 missense
Scores
1
9
9
Clinical Significance
Not reported in ClinVar
Conservation
PhyloP100: 5.71
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]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
IFIH1 | NM_022168.4 | c.2767A>C | p.Ile923Leu | missense_variant | 14/16 | ENST00000649979.2 | |
IFIH1 | XM_047445407.1 | c.2050A>C | p.Ile684Leu | missense_variant | 13/15 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
IFIH1 | ENST00000649979.2 | c.2767A>C | p.Ile923Leu | missense_variant | 14/16 | NM_022168.4 | P1 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome Cov.: 30
GnomAD4 exome
Cov.:
30
GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Not reported inComputational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Benign
T;T;.
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
.;D;D
M_CAP
Benign
D
MetaRNN
Uncertain
T;T;T
MetaSVM
Benign
T
MutationAssessor
Uncertain
M;M;.
MutationTaster
Benign
D;D
PrimateAI
Uncertain
T
PROVEAN
Benign
.;N;.
REVEL
Benign
Sift
Uncertain
.;D;.
Sift4G
Uncertain
.;T;.
Polyphen
P;P;.
Vest4
0.57
MutPred
Gain of catalytic residue at I923 (P = 0.0559);Gain of catalytic residue at I923 (P = 0.0559);.;
MVP
0.64
MPC
0.20
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at