rs12307655

Variant names:

• chr12-112911881-T-C
• rs12307655
• NM_016816.4:c.654+646T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_016816.4(OAS1):​c.654+646T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0878 in 152,252 control chromosomes in the GnomAD database, including 1,951 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 0.088 (1951 hom., cov: 32)
• Consequence: OAS1 NM_016816.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.219
• Publications: 3 publications found

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)

ENSG00000257452 (HGNC:):

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.298 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OAS1	NM_016816.4	c.654+646T>C		intron_variant	Intron 3 of 5	ENST00000202917.10	NP_058132.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OAS1	ENST00000202917.10	c.654+646T>C		intron_variant	Intron 3 of 5	1	NM_016816.4	ENSP00000202917.5

Frequencies

GnomAD3 genomes AF: 0.0878 AC: 13358 AN: 152134 Hom.: 1947 Cov.: 32

Gnomad AFR AF: 0.303

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0375

Gnomad ASJ AF: 0.00173

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00104

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0285

Gnomad NFE AF: 0.00153

Gnomad OTH AF: 0.0636

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

GnomAD4 genome AF: 0.0878 AC: 13371 AN: 152252 Hom.: 1951 Cov.: 32 AF XY: 0.0851 AC XY: 6337 AN XY: 74470

African (AFR) AF: 0.302 AC: 12543 AN: 41484

American (AMR) AF: 0.0374 AC: 573 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.00173 AC: 6 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00104 AC: 5 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.0272 AC: 8 AN: 294

European-Non Finnish (NFE) AF: 0.00151 AC: 103 AN: 68036

Other (OTH) AF: 0.0629 AC: 133 AN: 2114

Alfa AF: 0.0461 Hom.: 342

Bravo AF: 0.101

Asia WGS AF: 0.0160 AC: 56 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	11
DANN	Benign	0.75
PhyloP100		-0.22
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs12307655; hg19: chr12-113349686;