rs17509231

chr12-117356518-C-T

Variant summary

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

The NM_000620.5(NOS1):c.-421+4994G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.112 in 152,276 control chromosomes in the GnomAD database, including 1,038 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 0.11 (1038 hom., cov: 33)
• Consequence: NOS1 NM_000620.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0280

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=-0.9).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.132 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NOS1	NM_000620.5	c.-421+4994G>A		intron_variant		ENST00000317775.11
NOS1	NM_001204218.2	c.-421+4994G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NOS1	ENST00000317775.11	c.-421+4994G>A		intron_variant		1	NM_000620.5	P1
NOS1	ENST00000618760.4	c.-421+4994G>A		intron_variant		5
NOS1	ENST00000477584.1	n.118+4994G>A		intron_variant, non_coding_transcript_variant		2
NOS1	ENST00000549189.1	n.471-25029G>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes AF: 0.112 AC: 17015 AN: 152158 Hom.: 1039 Cov.: 33

Gnomad AFR AF: 0.0888

Gnomad AMI AF: 0.0636

Gnomad AMR AF: 0.0773

Gnomad ASJ AF: 0.121

Gnomad EAS AF: 0.0431

Gnomad SAS AF: 0.115

Gnomad FIN AF: 0.138

Gnomad MID AF: 0.111

Gnomad NFE AF: 0.135

Gnomad OTH AF: 0.111

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

GnomAD4 genome AF: 0.112 AC: 17008 AN: 152276 Hom.: 1038 Cov.: 33 AF XY: 0.112 AC XY: 8314 AN XY: 74450

Gnomad4 AFR AF: 0.0885

Gnomad4 AMR AF: 0.0772

Gnomad4 ASJ AF: 0.121

Gnomad4 EAS AF: 0.0432

Gnomad4 SAS AF: 0.114

Gnomad4 FIN AF: 0.138

Gnomad4 NFE AF: 0.135

Gnomad4 OTH AF: 0.110

Alfa AF: 0.126 Hom.: 1441

Bravo AF: 0.106

Asia WGS AF: 0.0680 AC: 237 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	1.6
Dann	Benign	0.43

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: rs17509231; hg19: chr12-117794323;