Genetic Variant OAS1:c.181-642A>C (chr12-112907894-A-C) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_016816.4(OAS1):c.181-642A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.741 in 152,278 control chromosomes in the GnomAD database, including 42,605 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 0.74 ( 42559 hom., cov: 33)

Exomes 𝑓: 0.82 ( 46 hom. )

Consequence

OAS1
NM_016816.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.551

Publications

9 publications found

Variant links:

Genes affected

OAS1 (HGNC:8086): (2'-5'-oligoadenylate synthetase 1) This interferon-induced gene encodes a protein that synthesizes 2',5'-oligoadenylates (2-5As). This protein plays a key role in innate cellular antiviral response, and has been implicated in other cellular processes like cell growth and apoptosis. Alternative splicing results in multiple transcript variants with different enzymatic activities. Polymorphisms in this gene have been associated with susceptibility to viral infection, including SARS-CoV-2, and diabetes mellitus, type 1. This gene is located in a cluster of related genes on chromosome 12. [provided by RefSeq, May 2022]

OAS1 Gene-Disease associations (from GenCC):

pulmonary alveolar proteinosis with hypogammaglobulinemia
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

OAS1 links:

ENSG00000257452 (HGNC:):

ENSG00000257452 links:

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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=-0.9).

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.97 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OAS1	NM_016816.4 link	c.181-642A>C		intron_variant	Intron 1 of 5	ENST00000202917.10	NP_058132.2	P00973-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OAS1	ENST00000202917.10 link	c.181-642A>C		intron_variant	Intron 1 of 5	1	NM_016816.4	ENSP00000202917.5		P00973-1

Frequencies

GnomAD3 genomes

AF:

0.741

AC:

112706

AN:

152028

Hom.:

42538

Cov.:

show subpopulations

Gnomad AFR

AF:

0.603

Gnomad AMI

AF:

0.765

Gnomad AMR

AF:

0.807

Gnomad ASJ

AF:

0.671

Gnomad EAS

AF:

0.993

Gnomad SAS

AF:

0.748

Gnomad FIN

AF:

0.797

Gnomad MID

AF:

0.693

Gnomad NFE

AF:

0.785

Gnomad OTH

AF:

0.763

GnomAD4 exome

AF:

0.818

AC:

108

AN:

132

Hom.:

AF XY:

0.900

AC XY:

AN XY:

show subpopulations

African (AFR)

AC:

AN:

American (AMR)

AF:

0.875

AC:

AN:

Ashkenazi Jewish (ASJ)

AC:

AN:

East Asian (EAS)

AC:

AN:

South Asian (SAS)

AF:

0.500

AC:

AN:

European-Finnish (FIN)

AF:

0.00

AC:

AN:

Middle Eastern (MID)

AC:

AN:

European-Non Finnish (NFE)

AF:

0.855

AC:

AN:

110

Other (OTH)

AF:

0.750

AC:

AN:

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.741

AC:

112787

AN:

152146

Hom.:

42559

Cov.:

AF XY:

0.744

AC XY:

55322

AN XY:

74374

show subpopulations

African (AFR)

AF:

0.603

AC:

25024

AN:

41478

American (AMR)

AF:

0.807

AC:

12337

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.671

AC:

2329

AN:

3472

East Asian (EAS)

AF:

0.993

AC:

5148

AN:

5186

South Asian (SAS)

AF:

0.749

AC:

3603

AN:

4812

European-Finnish (FIN)

AF:

0.797

AC:

8429

AN:

10582

Middle Eastern (MID)

AF:

0.684

AC:

201

AN:

294

European-Non Finnish (NFE)

AF:

0.785

AC:

53413

AN:

68002

Other (OTH)

AF:

0.760

AC:

1605

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

1476

2953

4429

5906

7382

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

846

1692

2538

3384

4230

<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:

0.761

Hom.:

7460

Bravo

AF:

0.739

Asia WGS

AF:

0.819

AC:

2849

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

5.8

(source)

DANN

Benign

0.64

PhyloP100

0.55

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over