Genetic Variant IL4:p.Ala73Glu (chr5-132679748-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_000589.4(IL4):c.218C>A(p.Ala73Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,613,844 control chromosomes in the GnomAD database, with no homozygous occurrence. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

IL4
NM_000589.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.0670

Variant links:

Genes affected

IL4 (HGNC:6014): (interleukin 4) The protein encoded by this gene is a pleiotropic cytokine produced by activated T cells. This cytokine is a ligand for interleukin 4 receptor. The interleukin 4 receptor also binds to IL13, which may contribute to many overlapping functions of this cytokine and IL13. STAT6, a signal transducer and activator of transcription, has been shown to play a central role in mediating the immune regulatory signal of this cytokine. This gene, IL3, IL5, IL13, and CSF2 form a cytokine gene cluster on chromosome 5q, with this gene particularly close to IL13. This gene, IL13 and IL5 are found to be regulated coordinately by several long-range regulatory elements in an over 120 kilobase range on the chromosome. IL4 is considered an important cytokine for tissue repair, counterbalancing the effects of proinflammatory type 1 cytokines, however, it also promotes allergic airway inflammation. Moreover, IL-4, a type 2 cytokine, mediates and regulates a variety of human host responses such as allergic, anti-parasitic, wound healing, and acute inflammation. This cytokine has been reported to promote resolution of neutrophil-mediated acute lung injury. In an allergic response, IL-4 has an essential role in the production of allergen-specific immunoglobin (Ig) E. This pro-inflammatory cytokine has been observed to be increased in COVID-19 (Coronavirus disease 2019) patients, but is not necessarily associated with severe COVID-19 pathology. Two alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported. [provided by RefSeq, Aug 2020]

IL4 links:

LOC105379176 (HGNC:):

LOC105379176 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IL4	NM_000589.4 link	c.218C>A	p.Ala73Glu	missense_variant	Exon 3 of 4	ENST00000231449.7	NP_000580.1	P05112-1D4HNR6
IL4	NM_172348.3 link	c.170C>A	p.Ala57Glu	missense_variant	Exon 2 of 3		NP_758858.1	P05112-2Q5FC01
IL4	NM_001354990.2 link	c.319C>A	p.Arg107Arg	synonymous_variant	Exon 4 of 5		NP_001341919.1
LOC105379176	NR_134248.1 link	n.545G>T		non_coding_transcript_exon_variant	Exon 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
IL4	ENST00000231449.7 link	c.218C>A	p.Ala73Glu	missense_variant	Exon 3 of 4	1	NM_000589.4	ENSP00000231449.2	P05112-1
IL4	ENST00000350025.2 link	c.170C>A	p.Ala57Glu	missense_variant	Exon 2 of 3	1		ENSP00000325190.3	P05112-2
IL4	ENST00000622422.1 link	c.319C>A	p.Arg107Arg	synonymous_variant	Exon 4 of 5	1		ENSP00000480581.1	U3LVN1
IL4	ENST00000495905.1 link	n.184C>A		non_coding_transcript_exon_variant	Exon 2 of 2	5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461638

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727118

show subpopulations

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:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.77

BayesDel_addAF

Benign

-0.049

BayesDel_noAF

Benign

-0.31

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.49

T;.

Eigen

Benign

-0.073

Eigen_PC

Benign

-0.26

FATHMM_MKL

Benign

0.043

LIST_S2

Uncertain

0.87

D;T

M_CAP

Benign

0.020

MetaRNN

Uncertain

0.58

D;D

MetaSVM

Benign

-0.93

MutationAssessor

Uncertain

2.1

M;.

PrimateAI

Benign

0.24

PROVEAN

Benign

-2.0

N;N

REVEL

Benign

0.24

Sift

Uncertain

0.0040

D;D

Sift4G

Uncertain

0.048

D;T

Polyphen

1.0

D;.

Vest4

0.44

MutPred

0.72

Gain of disorder (P = 0.0705);.;

MVP

0.77

MPC

1.1

ClinPred

0.72

GERP RS

0.59

Varity_R

0.59

gMVP

0.67

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

LitVar

Other links and lift over