4-184388913-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_002199.4(IRF2):c.895G>C(p.Val299Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 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)
• Consequence: IRF2 NM_002199.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0690

Genes affected

IRF2 (HGNC:6117): (interferon regulatory factor 2) IRF2 encodes interferon regulatory factor 2, a member of the interferon regulatory transcription factor (IRF) family. IRF2 competitively inhibits the IRF1-mediated transcriptional activation of interferons alpha and beta, and presumably other genes that employ IRF1 for transcription activation. However, IRF2 also functions as a transcriptional activator of histone H4. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.01785317).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IRF2	NM_002199.4	c.895G>C	p.Val299Leu	missense_variant	9/9	ENST00000393593.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IRF2	ENST00000393593.8	c.895G>C	p.Val299Leu	missense_variant	9/9	1	NM_002199.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

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

May 17, 2023

The c.895G>C (p.V299L) alteration is located in exon 9 (coding exon 8) of the IRF2 gene. This alteration results from a G to C substitution at nucleotide position 895, causing the valine (V) at amino acid position 299 to be replaced by a leucine (L). 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	0.069
BayesDel_addAF	Benign	-0.029	T
BayesDel_noAF	Benign	-0.28
Cadd	Benign	2.1
Dann	Benign	0.25
DEOGEN2	Benign	0.12	T
Eigen	Benign	-1.8
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.014	N
LIST_S2	Benign	0.75	T
M_CAP	Benign	0.051	D
MetaRNN	Benign	0.018	T
MetaSVM	Uncertain	-0.20	T
MutationAssessor	Benign	-1.9	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.26	T
PROVEAN	Benign	0.47	N
REVEL	Benign	0.27
Sift	Benign	1.0	T
Sift4G	Benign	0.56	T
Polyphen		0.0	B
Vest4		0.021
MutPred		0.12		Gain of catalytic residue at V299 (P = 0.0787);
MVP		0.75
MPC		0.83
ClinPred		0.025	T
GERP RS		-6.5
Varity_R		0.021
gMVP		0.11

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: chr4-185310067;