rs1483757

Positions:

• chr12-117323735-A-G
• chr12-117323735-A-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000620.5(NOS1):​c.725+6610T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.425 in 151,896 control chromosomes in the GnomAD database, including 14,010 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 0.43 (14010 hom., cov: 31)
• Consequence: NOS1 NM_000620.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.461

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 -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.98).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.504 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NOS1	NM_000620.5	c.725+6610T>C		intron_variant		ENST00000317775.11
NOS1	NM_001204218.2	c.725+6610T>C		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NOS1	ENST00000317775.11	c.725+6610T>C		intron_variant		1	NM_000620.5	P1
NOS1	ENST00000338101.8	c.725+6610T>C		intron_variant		5
NOS1	ENST00000618760.4	c.725+6610T>C		intron_variant		5

Frequencies

GnomAD3 genomes AF: 0.425 AC: 64528 AN: 151778 Hom.: 14003 Cov.: 31

Gnomad AFR AF: 0.355

Gnomad AMI AF: 0.320

Gnomad AMR AF: 0.513

Gnomad ASJ AF: 0.461

Gnomad EAS AF: 0.479

Gnomad SAS AF: 0.458

Gnomad FIN AF: 0.410

Gnomad MID AF: 0.366

Gnomad NFE AF: 0.444

Gnomad OTH AF: 0.424

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

GnomAD4 genome AF: 0.425 AC: 64571 AN: 151896 Hom.: 14010 Cov.: 31 AF XY: 0.425 AC XY: 31537 AN XY: 74226

Gnomad4 AFR AF: 0.355

Gnomad4 AMR AF: 0.513

Gnomad4 ASJ AF: 0.461

Gnomad4 EAS AF: 0.480

Gnomad4 SAS AF: 0.458

Gnomad4 FIN AF: 0.410

Gnomad4 NFE AF: 0.444

Gnomad4 OTH AF: 0.422

Alfa AF: 0.437 Hom.: 20884

Bravo AF: 0.431

Asia WGS AF: 0.440 AC: 1534 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.98
CADD	Benign	0.087
DANN	Benign	0.42

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

Other links and lift over

dbSNP: rs1483757; hg19: chr12-117761540;