Genetic Variant NNMT:p.Ala179Val (chr11-114312218-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006169.3(NNMT):c.536C>T(p.Ala179Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0002 in 1,614,200 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00027 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00019 ( 1 hom. )

Consequence

NNMT
NM_006169.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.65

Variant links:

Genes affected

NNMT (HGNC:7861): (nicotinamide N-methyltransferase) N-methylation is one method by which drug and other xenobiotic compounds are metabolized by the liver. This gene encodes the protein responsible for this enzymatic activity which uses S-adenosyl methionine as the methyl donor. [provided by RefSeq, Jul 2008]

NNMT links:

ENSG00000256947 (HGNC:):

ENSG00000256947 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.19993731).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NNMT	NM_006169.3 link	c.536C>T	p.Ala179Val	missense_variant	Exon 3 of 3	ENST00000299964.4	NP_006160.1	P40261B0YJ53

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NNMT	ENST00000299964.4 link	c.536C>T	p.Ala179Val	missense_variant	Exon 3 of 3	1	NM_006169.3	ENSP00000299964.3		P40261

Frequencies

GnomAD3 genomes

AF:

0.000269

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000289

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000397

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000215

AC:

AN:

251226

Hom.:

AF XY:

0.000214

AC XY:

AN XY:

135788

show subpopulations

Gnomad AFR exome

AF:

0.000246

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000508

Gnomad NFE exome

AF:

0.000326

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000193

AC:

282

AN:

1461864

Hom.:

Cov.:

AF XY:

0.000194

AC XY:

141

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.000209

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000599

Gnomad4 NFE exome

AF:

0.000205

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.000269

AC:

AN:

152336

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74484

show subpopulations

Gnomad4 AFR

AF:

0.000289

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000188

Gnomad4 NFE

AF:

0.000397

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000314

Hom.:

Bravo

AF:

0.000249

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000231

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 15, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.536C>T (p.A179V) alteration is located in exon 3 (coding exon 3) of the NNMT gene. This alteration results from a C to T substitution at nucleotide position 536, causing the alanine (A) at amino acid position 179 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.54

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.27

T;T

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.33

FATHMM_MKL

Benign

0.62

LIST_S2

Benign

0.56

.;T

M_CAP

Benign

0.0095

MetaRNN

Benign

0.20

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.9

L;L

PrimateAI

Benign

0.44

PROVEAN

Uncertain

-3.1

D;D

REVEL

Benign

0.18

Sift

Benign

0.053

T;T

Sift4G

Benign

0.071

T;T

Polyphen

1.0

D;D

Vest4

0.27

MVP

0.18

MPC

0.013

ClinPred

0.096

GERP RS

3.1

Varity_R

0.33

gMVP

0.15

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over