Genetic Variant IL1RN:c.117-679A>T (chr2-113128897-A-T) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBS1BS2

The NM_173842.3(IL1RN):c.117-679A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0141 in 152,258 control chromosomes in the GnomAD database, including 52 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.014 ( 52 hom., cov: 32)

Consequence

IL1RN
NM_173842.3 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.755

Publications

1 publications found

Variant links:

Genes affected

IL1RN (HGNC:6000): (interleukin 1 receptor antagonist) The protein encoded by this gene is a member of the interleukin 1 cytokine family. This protein inhibits the activities of interleukin 1, alpha (IL1A) and interleukin 1, beta (IL1B), and modulates a variety of interleukin 1 related immune and inflammatory responses, particularly in the acute phase of infection and inflammation. This gene and five other closely related cytokine genes form a gene cluster spanning approximately 400 kb on chromosome 2. A polymorphism of this gene is reported to be associated with increased risk of osteoporotic fractures and gastric cancer. Several alternatively spliced transcript variants encoding distinct isoforms have been reported. [provided by RefSeq, Aug 2020]

IL1RN Gene-Disease associations (from GenCC):

sterile multifocal osteomyelitis with periostitis and pustulosis
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet

IL1RN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0141 (2148/152258) while in subpopulation AFR AF = 0.0491 (2038/41542). AF 95% confidence interval is 0.0473. There are 52 homozygotes in GnomAd4. There are 1015 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 52 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IL1RN	NM_173842.3 link	c.117-679A>T		intron_variant	Intron 1 of 3	ENST00000409930.4	NP_776214.1	P18510-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IL1RN	ENST00000409930.4 link	c.117-679A>T		intron_variant	Intron 1 of 3	1	NM_173842.3	ENSP00000387173.3		P18510-1

Frequencies

GnomAD3 genomes

AF:

0.0141

AC:

2145

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0491

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00530

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.0100

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

AF:

0.0141

AC:

2148

AN:

152258

Hom.:

Cov.:

AF XY:

0.0136

AC XY:

1015

AN XY:

74452

show subpopulations

African (AFR)

AF:

0.0491

AC:

2038

AN:

41542

American (AMR)

AF:

0.00523

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000415

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68018

Other (OTH)

AF:

0.00994

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

104

208

313

417

521

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0112

Hom.:

Bravo

AF:

0.0165

Asia WGS

AF:

0.00231

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

5.8

(source)

DANN

Benign

0.47

PhyloP100

0.76

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over