chr21-33325101-G-A

Variant names:

• chr21-33325101-G-A
• rs866787077
• NM_000629.3:c.46G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001384502.1(IFNAR1):​c.-338G>A variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000559 in 1,611,318 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: IFNAR1 NM_001384502.1 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.535
• Publications: 0 publications found

Genes affected

IFNAR1 (HGNC:5432): (interferon alpha and beta receptor subunit 1) The protein encoded by this gene is a type I membrane protein that forms one of the two chains of a receptor for interferons alpha and beta. Binding and activation of the receptor stimulates Janus protein kinases, which in turn phosphorylate several proteins, including STAT1 and STAT2. The protein belongs to the type II cytokine receptor family and functions as an antiviral factor. [provided by RefSeq, Jul 2020]

IFNAR1 Gene-Disease associations (from GenCC):

• immunodeficiency 106, susceptibility to viral infections

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)

ENSG00000289238 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07210308).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001384502.1. 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
	IFNAR1	NM_000629.3	MANE Select	c.46G>A	p.Val16Met	missense	Exon 1 of 11	NP_000620.2
	IFNAR1	NM_001384502.1		c.-338G>A		5_prime_UTR_premature_start_codon_gain	Exon 1 of 11	NP_001371431.1
	IFNAR1	NM_001384500.1		c.-741G>A		5_prime_UTR_premature_start_codon_gain	Exon 1 of 11	NP_001371429.1	A0A8V8TQK8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IFNAR1	ENST00000270139.8	TSL:1 MANE Select	c.46G>A	p.Val16Met	missense	Exon 1 of 11	ENSP00000270139.3	P17181-1
	IFNAR1	ENST00000873010.1		c.46G>A	p.Val16Met	missense	Exon 1 of 12	ENSP00000543069.1
	IFNAR1	ENST00000703557.1		c.46G>A	p.Val16Met	missense	Exon 1 of 11	ENSP00000515373.1	A0A994J6F6

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152122 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000942

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1459196 Hom.: 0 Cov.: 31 AF XY: 0.00000276 AC XY: 2 AN XY: 725870

African (AFR) AF: 0.00 AC: 0 AN: 33438

American (AMR) AF: 0.00 AC: 0 AN: 44478

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26088

East Asian (EAS) AF: 0.00 AC: 0 AN: 39632

South Asian (SAS) AF: 0.00 AC: 0 AN: 85972

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52530

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5330

European-Non Finnish (NFE) AF: 0.00000540 AC: 6 AN: 1111492

Other (OTH) AF: 0.00 AC: 0 AN: 60236

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152122 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74312

African (AFR) AF: 0.00 AC: 0 AN: 41422

American (AMR) AF: 0.000131 AC: 2 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.0000942 AC: 1 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68018

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	15
DANN	Benign	0.87
DEOGEN2	Benign	0.070	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.12	N
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.083	D
MetaRNN	Benign	0.072	T
MetaSVM	Benign	-0.89	T
MutationAssessor	Benign	0.69	N
PhyloP100		0.54
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-0.050	N
REVEL	Benign	0.099
Sift	Benign	0.24	T
Sift4G	Benign	0.10	T
Polyphen		0.32	B
Vest4		0.13
MutPred		0.48		Loss of helix (P = 0.0093)
MVP		0.39
MPC		0.061
ClinPred		0.13	T
GERP RS		1.5
PromoterAI		-0.18	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.039
gMVP		0.11
Mutation Taster		=96/4	polymorphism

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

Other links and lift over

dbSNP: rs866787077; hg19: chr21-34697406;