17-27782076-G-A

Variant names:

• chr17-27782076-G-A
• rs3730017
• NM_000625.4:c.661C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000625.4(NOS2):​c.661C>T​(p.Arg221Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0315 in 1,613,922 control chromosomes in the GnomAD database, including 1,995 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.069 (784 hom., cov: 32)
  • Exomes 𝑓: 0.028 (1211 hom.)
• Consequence: NOS2 NM_000625.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.74
• Publications: 35 publications found

Genes affected

NOS2 (HGNC:7873): (nitric oxide synthase 2) Nitric oxide is a reactive free radical which acts as a biologic mediator in several processes, including neurotransmission and antimicrobial and antitumoral activities. This gene encodes a nitric oxide synthase which is expressed in liver and is inducible by a combination of lipopolysaccharide and certain cytokines. Three related pseudogenes are located within the Smith-Magenis syndrome region on chromosome 17. [provided by RefSeq, Jul 2008]

NOS2 Gene-Disease associations (from GenCC):

• schizophrenia

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0028842986).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.183 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000625.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NOS2	NM_000625.4	MANE Select	c.661C>T	p.Arg221Trp	missense	Exon 7 of 27	NP_000616.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NOS2	ENST00000313735.11	TSL:1 MANE Select	c.661C>T	p.Arg221Trp	missense	Exon 7 of 27	ENSP00000327251.6
	NOS2	ENST00000646938.1		c.658C>T	p.Arg220Trp	missense	Exon 6 of 26	ENSP00000494870.1
	NOS2	ENST00000697337.1		n.*107C>T		non_coding_transcript_exon	Exon 5 of 24	ENSP00000513259.1

Frequencies

GnomAD3 genomes AF: 0.0693 AC: 10530 AN: 151984 Hom.: 782 Cov.: 32

Gnomad AFR AF: 0.187

Gnomad AMI AF: 0.0143

Gnomad AMR AF: 0.0611

Gnomad ASJ AF: 0.00979

Gnomad EAS AF: 0.00752

Gnomad SAS AF: 0.0475

Gnomad FIN AF: 0.00567

Gnomad MID AF: 0.0316

Gnomad NFE AF: 0.0204

Gnomad OTH AF: 0.0489

GnomAD2 exomes AF: 0.0373 AC: 9367 AN: 251276 AF XY: 0.0335

Gnomad AFR exome AF: 0.192

Gnomad AMR exome AF: 0.0616

Gnomad ASJ exome AF: 0.0102

Gnomad EAS exome AF: 0.00979

Gnomad FIN exome AF: 0.00541

Gnomad NFE exome AF: 0.0189

Gnomad OTH exome AF: 0.0271

GnomAD4 exome AF: 0.0276 AC: 40358 AN: 1461820 Hom.: 1211 Cov.: 33 AF XY: 0.0274 AC XY: 19956 AN XY: 727200

African (AFR) AF: 0.190 AC: 6352 AN: 33476

American (AMR) AF: 0.0618 AC: 2764 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.0112 AC: 294 AN: 26136

East Asian (EAS) AF: 0.00594 AC: 236 AN: 39700

South Asian (SAS) AF: 0.0460 AC: 3969 AN: 86234

European-Finnish (FIN) AF: 0.00569 AC: 304 AN: 53418

Middle Eastern (MID) AF: 0.0265 AC: 153 AN: 5768

European-Non Finnish (NFE) AF: 0.0218 AC: 24232 AN: 1111984

Other (OTH) AF: 0.0340 AC: 2054 AN: 60396

GnomAD4 genome AF: 0.0693 AC: 10547 AN: 152102 Hom.: 784 Cov.: 32 AF XY: 0.0678 AC XY: 5041 AN XY: 74346

African (AFR) AF: 0.186 AC: 7729 AN: 41464

American (AMR) AF: 0.0618 AC: 944 AN: 15272

Ashkenazi Jewish (ASJ) AF: 0.00979 AC: 34 AN: 3472

East Asian (EAS) AF: 0.00773 AC: 40 AN: 5172

South Asian (SAS) AF: 0.0472 AC: 227 AN: 4814

European-Finnish (FIN) AF: 0.00567 AC: 60 AN: 10582

Middle Eastern (MID) AF: 0.0306 AC: 9 AN: 294

European-Non Finnish (NFE) AF: 0.0204 AC: 1389 AN: 68010

Other (OTH) AF: 0.0483 AC: 102 AN: 2110

Alfa AF: 0.0351 Hom.: 1127

Bravo AF: 0.0784

TwinsUK AF: 0.0183 AC: 68

ALSPAC AF: 0.0226 AC: 87

ESP6500AA AF: 0.180 AC: 794

ESP6500EA AF: 0.0230 AC: 198

ExAC AF: 0.0398 AC: 4830

Asia WGS AF: 0.0340 AC: 118 AN: 3478

EpiCase AF: 0.0185

EpiControl AF: 0.0199

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.098
BayesDel_addAF	Benign	-0.66	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.27	T
Eigen	Benign	0.16
Eigen_PC	Benign	0.068
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.95	D
MetaRNN	Benign	0.0029	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.7	L
PhyloP100		1.7
PrimateAI	Benign	0.21	T
PROVEAN	Uncertain	-4.0	D
REVEL	Benign	0.089
Sift	Uncertain	0.019	D
Sift4G	Uncertain	0.022	D
Polyphen		1.0	D
Vest4		0.27
MPC		0.98
ClinPred		0.033	T
GERP RS		2.1
Varity_R		0.34
gMVP		0.42
Mutation Taster		=91/9	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs3730017; hg19: chr17-26109102; COSMIC: COSV58222998;