12-117220098-C-G

Variant names:

• chr12-117220098-C-G
• rs757580443
• NM_000620.5:c.4147G>C

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000620.5(NOS1):​c.4147G>C​(p.Gly1383Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,459,088 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 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. G1383C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• 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 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.832

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000620.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NOS1	NM_000620.5	MANE Select	c.4147G>C	p.Gly1383Arg	missense	Exon 27 of 29	NP_000611.1	P29475-1
	NOS1	NM_001204218.2		c.4249G>C	p.Gly1417Arg	missense	Exon 28 of 30	NP_001191147.1	P29475-5
	NOS1	NM_001204213.2		c.3139G>C	p.Gly1047Arg	missense	Exon 26 of 28	NP_001191142.1	P29475-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NOS1	ENST00000317775.11	TSL:1 MANE Select	c.4147G>C	p.Gly1383Arg	missense	Exon 27 of 29	ENSP00000320758.6	P29475-1
	NOS1	ENST00000338101.8	TSL:5	c.4249G>C	p.Gly1417Arg	missense	Exon 27 of 29	ENSP00000337459.4	P29475-5
	NOS1	ENST00000618760.4	TSL:5	c.4249G>C	p.Gly1417Arg	missense	Exon 28 of 30	ENSP00000477999.1	P29475-5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1459088 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 725734

African (AFR) AF: 0.00 AC: 0 AN: 33412

American (AMR) AF: 0.00 AC: 0 AN: 44402

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25878

East Asian (EAS) AF: 0.00 AC: 0 AN: 39622

South Asian (SAS) AF: 0.00 AC: 0 AN: 85736

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53264

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5746

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1110724

Other (OTH) AF: 0.00 AC: 0 AN: 60304

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Uncertain	0.081	D
BayesDel_noAF	Benign	-0.12
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.46	T
Eigen	Uncertain	0.40
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.94	D
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.83	D
MetaSVM	Uncertain	0.014	D
MutationAssessor	Uncertain	2.3	M
PhyloP100		6.1
PrimateAI	Uncertain	0.69	T
PROVEAN	Uncertain	-2.9	D
REVEL	Uncertain	0.54
Sift	Benign	0.33	T
Sift4G	Benign	0.39	T
Polyphen		1.0	D
Vest4		0.75
MutPred		0.52		Gain of MoRF binding (P = 0.0089)
MVP		0.82
MPC		1.6
ClinPred		0.99	D
GERP RS		4.4
Varity_R		0.37
gMVP		0.79
Mutation Taster		=55/45	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: rs757580443; hg19: chr12-117657903;