rs74427117

Variant names:

• chr12-117220188-C-G
• rs74427117
• NM_000620.5:c.4057G>C

Your query was ambiguous. Multiple possible variants found:

• chr12-117220188-C-G
• chr12-117220188-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000620.5(NOS1):​c.4057G>C​(p.Val1353Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V1353I) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NOS1 NM_000620.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.15
• Publications: 0 publications found

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]

NOS1 Gene-Disease associations (from GenCC):

• idiopathic achalasia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NOS1	NM_000620.5	c.4057G>C	p.Val1353Leu	missense_variant	Exon 27 of 29	ENST00000317775.11	NP_000611.1
NOS1	NM_001204218.2	c.4159G>C	p.Val1387Leu	missense_variant	Exon 28 of 30		NP_001191147.1
NOS1	NM_001204213.2	c.3049G>C	p.Val1017Leu	missense_variant	Exon 26 of 28		NP_001191142.1
NOS1	NM_001204214.2	c.3049G>C	p.Val1017Leu	missense_variant	Exon 26 of 28		NP_001191143.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NOS1	ENST00000317775.11	c.4057G>C	p.Val1353Leu	missense_variant	Exon 27 of 29	1	NM_000620.5	ENSP00000320758.6
NOS1	ENST00000338101.8	c.4159G>C	p.Val1387Leu	missense_variant	Exon 27 of 29	5		ENSP00000337459.4
NOS1	ENST00000618760.4	c.4159G>C	p.Val1387Leu	missense_variant	Exon 28 of 30	5		ENSP00000477999.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.85
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.81	D;.;.;D
Eigen	Uncertain	0.40
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Pathogenic	0.99	D;D;.;D
M_CAP	Uncertain	0.15	D
MetaRNN	Uncertain	0.70	D;D;D;D
MetaSVM	Uncertain	-0.087	T
MutationAssessor	Benign	2.0	M;.;.;.
PhyloP100		6.2
PrimateAI	Pathogenic	0.79	T
PROVEAN	Uncertain	-2.6	D;.;D;.
REVEL	Pathogenic	0.65
Sift	Uncertain	0.0020	D;.;D;.
Sift4G	Uncertain	0.017	D;D;D;D
Polyphen		0.82	P;.;.;.
Vest4		0.65
MutPred		0.50		Gain of catalytic residue at I1351 (P = 4e-04);.;.;.;
MVP		0.90
MPC		1.2
ClinPred		0.98	D
GERP RS		4.4
Varity_R		0.52
gMVP		0.83
Mutation Taster		=86/14	polymorphism

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: rs74427117; hg19: chr12-117657993;