rs796051887

chr10-6021564-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP3_Moderate PP5

The NM_000417.3(IL2RA):c.497G>A(p.Ser166Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. S166S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: IL2RA NM_000417.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.09

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 Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.935
• PP5: Variant 10-6021564-C-T is Pathogenic according to our data. Variant chr10-6021564-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 203517.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IL2RA	NM_000417.3	c.497G>A	p.Ser166Asn	missense_variant	4/8	ENST00000379959.8
IL2RA	NM_001308242.2	c.368-1623G>A		intron_variant
IL2RA	NM_001308243.2	c.368-2065G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IL2RA	ENST00000379959.8	c.497G>A	p.Ser166Asn	missense_variant	4/8	1	NM_000417.3	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461890 Hom.: 0 Cov.: 35 AF XY: 0.00000550 AC XY: 4 AN XY: 727244

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000629

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000756

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Immunodeficiency due to CD25 deficiency Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 01, 2013

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.88
BayesDel_addAF	Benign	0.0075	T
BayesDel_noAF	Benign	-0.23
Cadd	Benign	22
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.74	D;.
Eigen	Uncertain	0.23
Eigen_PC	Benign	0.027
FATHMM_MKL	Benign	0.054	N
LIST_S2	Benign	0.74	T;T
M_CAP	Uncertain	0.18	D
MetaRNN	Pathogenic	0.94	D;D
MetaSVM	Benign	-0.56	T
MutationAssessor	Uncertain	2.7	M;.
MutationTaster	Benign	1.0	D;N;N
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-2.3	N;N
REVEL	Uncertain	0.44
Sift	Uncertain	0.016	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.86
MutPred		0.72		Loss of sheet (P = 0.0315);Loss of sheet (P = 0.0315);
MVP		0.80
MPC		0.71
ClinPred		0.77	D
GERP RS		4.3
Varity_R		0.63
gMVP		0.69

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: rs796051887; hg19: chr10-6063527;