2-138002096-G-A

Position:

chr2-138002096-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_ModerateBP6_Moderate

The NM_006895.3(HNMT):c.331G>A(p.Val111Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00001 in 1,596,370 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000010 ( 1 hom. )

Consequence

HNMT
NM_006895.3 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.570

Variant links:

Genes affected

HNMT (HGNC:5028): (histamine N-methyltransferase) In mammals, histamine is metabolized by two major pathways: N(tau)-methylation via histamine N-methyltransferase and oxidative deamination via diamine oxidase. This gene encodes the first enzyme which is found in the cytosol and uses S-adenosyl-L-methionine as the methyl donor. In the mammalian brain, the neurotransmitter activity of histamine is controlled by N(tau)-methylation as diamine oxidase is not found in the central nervous system. A common genetic polymorphism affects the activity levels of this gene product in red blood cells. Multiple alternatively spliced transcript variants that encode different proteins have been found for this gene. [provided by RefSeq, Jul 2008]

HNMT links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.08207643).

BP6

Variant 2-138002096-G-A is Benign according to our data. Variant chr2-138002096-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 3106369.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
HNMT	NM_006895.3 linkuse as main transcript	c.331G>A	p.Val111Ile	missense_variant	4/6	ENST00000280097.5
HNMT	XM_017003948.2 linkuse as main transcript	c.229G>A	p.Val77Ile	missense_variant	4/6
HNMT	XM_017003949.3 linkuse as main transcript	c.331G>A	p.Val111Ile	missense_variant	4/5
HNMT	XM_011511064.3 linkuse as main transcript	c.-48G>A		5_prime_UTR_variant	3/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HNMT	ENST00000280097.5 linkuse as main transcript	c.331G>A	p.Val111Ile	missense_variant	4/6	1	NM_006895.3	P1	P50135-1
HNMT	ENST00000410115.5 linkuse as main transcript	c.331G>A	p.Val111Ile	missense_variant	5/7	5		P1	P50135-1
HNMT	ENST00000467390.5 linkuse as main transcript	n.343G>A		non_coding_transcript_exon_variant	4/5	2
HNMT	ENST00000485653.1 linkuse as main transcript	n.263G>A		non_coding_transcript_exon_variant	3/5	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000124

AC:

AN:

241316

Hom.:

AF XY:

0.0000153

AC XY:

AN XY:

130474

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000113

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000903

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000104

AC:

AN:

1444222

Hom.:

Cov.:

AF XY:

0.00000836

AC XY:

AN XY:

717906

show subpopulations

Gnomad4 AFR exome

AF:

0.0000917

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000768

Gnomad4 SAS exome

AF:

0.0000365

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000272

Gnomad4 OTH exome

AF:

0.0000503

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152148

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74376

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ExAC

AF:

0.00000824

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3476

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 08, 2024

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.066

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.72

CADD

Benign

DANN

Benign

0.49

DEOGEN2

Benign

0.058

T;T

Eigen

Benign

-0.71

Eigen_PC

Benign

-0.49

FATHMM_MKL

Benign

0.32

LIST_S2

Benign

0.74

.;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.082

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

-0.41

N;N

MutationTaster

Benign

0.74

N;N

PrimateAI

Benign

0.28

PROVEAN

Benign

-0.25

N;N

REVEL

Benign

0.11

Sift

Benign

1.0

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.0040

B;B

Vest4

0.16

MutPred

0.57

Loss of sheet (P = 0.0817);Loss of sheet (P = 0.0817);

MVP

0.22

MPC

0.053

ClinPred

0.0097

GERP RS

2.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.054

gMVP

0.18

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