X-71107752-A-G

Position:

• chrX-71107752-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000206.3(IL2RG):​c.1094T>C​(p.Leu365Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: IL2RG NM_000206.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.883

Genes affected

IL2RG (HGNC:6010): (interleukin 2 receptor subunit gamma) The protein encoded by this gene is an important signaling component of many interleukin receptors, including those of interleukin -2, -4, -7 and -21, and is thus referred to as the common gamma chain. Mutations in this gene cause X-linked severe combined immunodeficiency (XSCID), as well as X-linked combined immunodeficiency (XCID), a less severe immunodeficiency disorder. [provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22056901).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IL2RG	NM_000206.3	c.1094T>C	p.Leu365Pro	missense_variant	8/8	ENST00000374202.7	NP_000197.1
IL2RG	XM_047442089.1	c.*214T>C		3_prime_UTR_variant	7/7		XP_047298045.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IL2RG	ENST00000374202.7	c.1094T>C	p.Leu365Pro	missense_variant	8/8	1	NM_000206.3	ENSP00000363318	P1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1029395 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 328077

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 24

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

X-linked severe combined immunodeficiency Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 01, 2021

This sequence change replaces leucine with proline at codon 365 of the IL2RG protein (p.Leu365Pro). The leucine residue is moderately conserved and there is a moderate physicochemical difference between leucine and proline. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with IL2RG-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The proline amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.063
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
CADD	Benign	12
DANN	Benign	0.53
DEOGEN2	Uncertain	0.50	T;.;.
FATHMM_MKL	Benign	0.70	D
LIST_S2	Benign	0.56	T;T;T
M_CAP	Uncertain	0.21	D
MetaRNN	Benign	0.22	T;T;T
MetaSVM	Uncertain	0.55	D
MutationAssessor	Uncertain	2.3	M;.;.
MutationTaster	Benign	0.93	N;N;N
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.43	N;N;N
REVEL	Uncertain	0.37
Sift	Benign	0.057	T;T;T
Sift4G	Benign	0.12	T;D;T
Polyphen		1.0	D;B;.
Vest4		0.30
MutPred		0.32		Loss of stability (P = 0.0088);.;.;
MVP		0.85
MPC		1.1
ClinPred		0.28	T
GERP RS		3.2
Varity_R		0.12
gMVP		0.52

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: rs1602287912; hg19: chrX-70327602;