10-6011323-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_000417.3(IL2RA):c.*1549C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0419 in 152,064 control chromosomes in the GnomAD database, including 359 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.042 (359 hom., cov: 32)
  • Exomes 𝑓: 0.035 (0 hom.)
• Consequence: IL2RA NM_000417.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.543

Genes affected

IL2RA (HGNC:6008): (interleukin 2 receptor subunit alpha) The interleukin 2 (IL2) receptor alpha (IL2RA) and beta (IL2RB) chains, together with the common gamma chain (IL2RG), constitute the high-affinity IL2 receptor. Homodimeric alpha chains (IL2RA) result in low-affinity receptor, while homodimeric beta (IL2RB) chains produce a medium-affinity receptor. Normally an integral-membrane protein, soluble IL2RA has been isolated and determined to result from extracellular proteolyisis. Alternately-spliced IL2RA mRNAs have been isolated, but the significance of each is presently unknown. Mutations in this gene are associated with interleukin 2 receptor alpha deficiency. Patients with severe Coronavirus Disease 2019 (COVID-19), the disease caused by the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), have significantly elevated levels of IL2R in their plasma. Similarly, serum IL-2R levels are found to be elevated in patients with different types of carcinomas. Certain IL2RA and IL2RB gene polymorphisms have been associated with lung cancer risk. [provided by RefSeq, Jul 2020]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BP6: Variant 10-6011323-G-A is Benign according to our data. Variant chr10-6011323-G-A is described in ClinVar as [Benign]. Clinvar id is 300222.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.29 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IL2RA	NM_000417.3	c.*1549C>T		3_prime_UTR_variant	8/8	ENST00000379959.8
IL2RA	NM_001308242.2	c.*1549C>T		3_prime_UTR_variant	7/7
IL2RA	NM_001308243.2	c.*1549C>T		3_prime_UTR_variant	6/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IL2RA	ENST00000379959.8	c.*1549C>T		3_prime_UTR_variant	8/8	1	NM_000417.3	P1
IL2RA	ENST00000649218.1	n.2183C>T		non_coding_transcript_exon_variant	4/4

Frequencies

GnomAD3 genomes AF: 0.0418 AC: 6351 AN: 151804 Hom.: 359 Cov.: 32

Gnomad AFR AF: 0.00961

Gnomad AMI AF: 0.00548

Gnomad AMR AF: 0.0646

Gnomad ASJ AF: 0.0210

Gnomad EAS AF: 0.302

Gnomad SAS AF: 0.0623

Gnomad FIN AF: 0.0505

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.0355

Gnomad OTH AF: 0.0404

GnomAD4 exome AF: 0.0352 AC: 5 AN: 142 Hom.: 0 Cov.: 0 AF XY: 0.0256 AC XY: 2 AN XY: 78

Gnomad4 EAS exome AF: 0.0362

Gnomad4 NFE exome AF: 0.00

GnomAD4 genome AF: 0.0419 AC: 6364 AN: 151922 Hom.: 359 Cov.: 32 AF XY: 0.0451 AC XY: 3351 AN XY: 74222

Gnomad4 AFR AF: 0.00970

Gnomad4 AMR AF: 0.0653

Gnomad4 ASJ AF: 0.0210

Gnomad4 EAS AF: 0.303

Gnomad4 SAS AF: 0.0615

Gnomad4 FIN AF: 0.0505

Gnomad4 NFE AF: 0.0355

Gnomad4 OTH AF: 0.0400

Alfa AF: 0.0352 Hom.: 28

Bravo AF: 0.0432

Asia WGS AF: 0.142 AC: 495 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Immunodeficiency due to CD25 deficiency Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
Cadd	Benign	0.51
Dann	Benign	0.50

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

LitVar

Other links and lift over

dbSNP: rs12722604; hg19: chr10-6053286;