chr21-33325071-C-T

Variant names:

• chr21-33325071-C-T
• rs770095813
• NM_000629.3:c.16C>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Moderate BP6_Moderate

The NM_001384502.1(IFNAR1):​c.-368C>T 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 0.00000871 in 1,608,258 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 Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000082 (0 hom.)
• Consequence: IFNAR1 NM_001384502.1 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.175
• 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: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.34).
• BP6: Variant 21-33325071-C-T is Benign according to our data. Variant chr21-33325071-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1632806.Status of the report is criteria_provided_single_submitter, 1 stars.

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.16C>T	p.Leu6Leu	synonymous	Exon 1 of 11	NP_000620.2
	IFNAR1	NM_001384502.1		c.-368C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 11	NP_001371431.1
	IFNAR1	NM_001384500.1		c.-771C>T		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.16C>T	p.Leu6Leu	synonymous	Exon 1 of 11	ENSP00000270139.3	P17181-1
	IFNAR1	ENST00000873010.1		c.16C>T	p.Leu6Leu	synonymous	Exon 1 of 12	ENSP00000543069.1
	IFNAR1	ENST00000703557.1		c.16C>T	p.Leu6Leu	synonymous	Exon 1 of 11	ENSP00000515373.1	A0A994J6F6

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152132 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000126 AC: 3 AN: 237482 AF XY: 0.0000154

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000187

Gnomad OTH exome AF: 0.000174

GnomAD4 exome AF: 0.00000824 AC: 12 AN: 1456126 Hom.: 0 Cov.: 31 AF XY: 0.00000829 AC XY: 6 AN XY: 724068

African (AFR) AF: 0.00 AC: 0 AN: 33412

American (AMR) AF: 0.00 AC: 0 AN: 43860

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25998

East Asian (EAS) AF: 0.00 AC: 0 AN: 39472

South Asian (SAS) AF: 0.00 AC: 0 AN: 85432

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52012

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5560

European-Non Finnish (NFE) AF: 0.0000108 AC: 12 AN: 1110306

Other (OTH) AF: 0.00 AC: 0 AN: 60074

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152132 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74318

African (AFR) AF: 0.00 AC: 0 AN: 41430

American (AMR) AF: 0.00 AC: 0 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10610

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68016

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.34
CADD	Benign	11
DANN	Benign	0.96
PhyloP100		-0.17
PromoterAI		0.027	Neutral

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: rs770095813; hg19: chr21-34697376;