chr12-117215301-G-A

Position:

• chr12-117215301-G-A

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS2

The NM_000620.5(NOS1):​c.*8C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000485 in 1,557,412 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.0026 (3 hom., cov: 32)
  • Exomes 𝑓: 0.00026 (2 hom.)
• Consequence: NOS1 NM_000620.5 3_prime_UTR
• Clinical Significance: Benign no assertion criteria provided B:1
• Conservation: PhyloP100: 3.05

Genes affected

NOS1 (HGNC:7872): (nitric oxide synthase 1) The protein encoded by this gene belongs to the family of nitric oxide synthases, which synthesize nitric oxide from L-arginine. Nitric oxide is a reactive free radical, which acts as a biologic mediator in several processes, including neurotransmission, and antimicrobial and antitumoral activities. In the brain and peripheral nervous system, nitric oxide displays many properties of a neurotransmitter, and has been implicated in neurotoxicity associated with stroke and neurodegenerative diseases, neural regulation of smooth muscle, including peristalsis, and penile erection. This protein is ubiquitously expressed, with high level of expression in skeletal muscle. Multiple transcript variants that differ in the 5' UTR have been described for this gene but the full-length nature of these transcripts is not known. Additionally, alternatively spliced transcript variants encoding different isoforms (some testis-specific) have been found for this gene.[provided by RefSeq, Feb 2011]

ACMG classification

Verdict is Benign. Variant got -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.7).
• BP6: Variant 12-117215301-G-A is Benign according to our data. Variant chr12-117215301-G-A is described in ClinVar as [Benign]. Clinvar id is 3033399.Status of the report is no_assertion_criteria_provided, 0 stars.
• BS2: High AC in GnomAd4 at 390 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NOS1	NM_000620.5	c.*8C>T		3_prime_UTR_variant	29/29	ENST00000317775.11	NP_000611.1
NOS1	NM_001204218.2	c.*8C>T		3_prime_UTR_variant	30/30		NP_001191147.1
NOS1	NM_001204213.2	c.*8C>T		3_prime_UTR_variant	28/28		NP_001191142.1
NOS1	NM_001204214.2	c.*8C>T		3_prime_UTR_variant	28/28		NP_001191143.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NOS1	ENST00000317775.11	c.*8C>T		3_prime_UTR_variant	29/29	1	NM_000620.5	ENSP00000320758.6
NOS1	ENST00000338101.8	c.*8C>T		3_prime_UTR_variant	29/29	5		ENSP00000337459.4
NOS1	ENST00000618760.4	c.*8C>T		3_prime_UTR_variant	30/30	5		ENSP00000477999.1

Frequencies

GnomAD3 genomes AF: 0.00256 AC: 390 AN: 152206 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.00900

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000916

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: 0.000955

GnomAD3 exomes AF: 0.000677 AC: 149 AN: 220178 Hom.: 1 AF XY: 0.000565 AC XY: 68 AN XY: 120252

Gnomad AFR exome AF: 0.00926

Gnomad AMR exome AF: 0.000665

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000198

GnomAD4 exome AF: 0.000260 AC: 365 AN: 1405088 Hom.: 2 Cov.: 33 AF XY: 0.000199 AC XY: 139 AN XY: 697708

Gnomad4 AFR exome AF: 0.0103

Gnomad4 AMR exome AF: 0.000558

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000130

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000554

Gnomad4 OTH exome AF: 0.000278

GnomAD4 genome AF: 0.00256 AC: 390 AN: 152324 Hom.: 3 Cov.: 32 AF XY: 0.00246 AC XY: 183 AN XY: 74504

Gnomad4 AFR AF: 0.00897

Gnomad4 AMR AF: 0.000915

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: 0.000945

Alfa AF: 0.00170 Hom.: 1

Bravo AF: 0.00332

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

Submissions by phenotype

NOS1-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 17, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.70
CADD	Benign	14
DANN	Benign	0.86

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs9658557; hg19: chr12-117653106;