Genetic Variant SMOX:p.Asp285His (chr20-4182332-G-C) – 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_175839.3(SMOX):c.853G>C(p.Asp285His) variant causes a missense change. The variant allele was found at a frequency of 0.00000139 in 1,441,934 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

SMOX
NM_175839.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.60

Variant links:

Genes affected

SMOX (HGNC:15862): (spermine oxidase) Polyamines are ubiquitous polycationic alkylamines which include spermine, spermidine, putrescine, and agmatine. These molecules participate in a broad range of cellular functions which include cell cycle modulation, scavenging reactive oxygen species, and the control of gene expression. These molecules also play important roles in neurotransmission through their regulation of cell-surface receptor activity, involvement in intracellular signalling pathways, and their putative roles as neurotransmitters. This gene encodes an FAD-containing enzyme that catalyzes the oxidation of spermine to spermadine and secondarily produces hydrogen peroxide. Multiple transcript variants encoding different isoenzymes have been identified for this gene, some of which have failed to demonstrate significant oxidase activity on natural polyamine substrates. The characterized isoenzymes have distinctive biochemical characteristics and substrate specificities, suggesting the existence of additional levels of complexity in polyamine catabolism. [provided by RefSeq, Jul 2012]

SMOX 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=0.1892978).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMOX	NM_175839.3 link	c.853G>C	p.Asp285His	missense_variant	Exon 5 of 7	ENST00000305958.9	NP_787033.1	Q9NWM0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMOX	ENST00000305958.9 link	c.853G>C	p.Asp285His	missense_variant	Exon 5 of 7	1	NM_175839.3	ENSP00000307252.4		Q9NWM0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000423

AC:

AN:

236672

Hom.:

AF XY:

0.00000783

AC XY:

AN XY:

127742

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000552

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000139

AC:

AN:

1441934

Hom.:

Cov.:

AF XY:

0.00000280

AC XY:

AN XY:

714620

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000254

Gnomad4 SAS exome

AF:

0.0000119

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.853G>C (p.D285H) alteration is located in exon 5 (coding exon 4) of the SMOX gene. This alteration results from a G to C substitution at nucleotide position 853, causing the aspartic acid (D) at amino acid position 285 to be replaced by a histidine (H). 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

0.25

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.41

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.32

.;T;T;.

Eigen

Benign

0.093

Eigen_PC

Benign

0.048

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.90

D;.;D;D

M_CAP

Benign

0.050

MetaRNN

Benign

0.19

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.6

L;L;L;.

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-1.0

.;N;N;N

REVEL

Benign

0.068

Sift

Uncertain

0.013

.;D;D;D

Sift4G

Uncertain

0.015

D;D;D;D

Polyphen

0.99

D;D;D;.

Vest4

0.55

MutPred

0.37

Loss of sheet (P = 0.0457);Loss of sheet (P = 0.0457);Loss of sheet (P = 0.0457);.;

MVP

0.093

MPC

1.4

ClinPred

0.57

GERP RS

1.9

Varity_R

0.084

gMVP

0.47

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

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