5-132486835-G-T

Variant names:

• chr5-132486835-G-T
• rs1304739708
• NM_002198.3:c.374C>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_002198.3(IRF1):​c.374C>A​(p.Ser125*) variant causes a stop gained change. The variant allele was found at a frequency of 0.000000684 in 1,461,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: IRF1 NM_002198.3 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.72
• Publications: 0 publications found

Genes affected

IRF1 (HGNC:6116): (interferon regulatory factor 1) The protein encoded by this gene is a transcriptional regulator and tumor suppressor, serving as an activator of genes involved in both innate and acquired immune responses. The encoded protein activates the transcription of genes involved in the body's response to viruses and bacteria, playing a role in cell proliferation, apoptosis, the immune response, and DNA damage response. This protein represses the transcription of several other genes. As a tumor suppressor, it both suppresses tumor cell growth and stimulates an immune response against tumor cells. Defects in this gene have been associated with gastric cancer, myelogenous leukemia, and lung cancer. [provided by RefSeq, Aug 2017]

ENSG00000283782 (HGNC:):

CARINH (HGNC:33838): (colitis associated IRF1 antisense regulator of intestinal homeostasis)

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002198.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IRF1	NM_002198.3	MANE Select	c.374C>A	p.Ser125*	stop_gained	Exon 5 of 10	NP_002189.1	P10914
	IRF1	NM_001354924.1		c.374C>A	p.Ser125*	stop_gained	Exon 5 of 9	NP_001341853.1	X5D3F6
	IRF1	NM_001354925.1		c.374C>A	p.Ser125*	stop_gained	Exon 5 of 8	NP_001341854.1	A0A7P0TAL6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IRF1	ENST00000245414.9	TSL:1 MANE Select	c.374C>A	p.Ser125*	stop_gained	Exon 5 of 10	ENSP00000245414.4	P10914
	ENSG00000283782	ENST00000638452.2	TSL:5	c.-169+37146G>T		intron	N/A	ENSP00000492349.2	A0A1W2PQ90
	CARINH	ENST00000612967.2	TSL:1	n.924G>T		non_coding_transcript_exon	Exon 4 of 4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461852 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727230

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

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86232

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112006

Other (OTH) AF: 0.00 AC: 0 AN: 60394

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.50
CADD	Pathogenic	40
DANN	Uncertain	1.0
Eigen	Pathogenic	0.78
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Uncertain	0.95	D
PhyloP100		3.7
Vest4		0.94
GERP RS		5.1
PromoterAI		-0.024	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=20/180	disease causing (fs/PTC)

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

Other links and lift over

dbSNP: rs1304739708; hg19: chr5-131822527;