Genetic Variant MAOA:p.Arg172Leu (chrX-43728184-G-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000240.4(MAOA):c.515G>T(p.Arg172Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,097,212 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R172Q) has been classified as Benign.

Frequency

Genomes: not found (cov: 24)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

MAOA
NM_000240.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.10

Publications

0 publications found

Variant links:

Genes affected

MAOA (HGNC:6833): (monoamine oxidase A) This gene is one of two neighboring gene family members that encode mitochondrial enzymes which catalyze the oxidative deamination of amines, such as dopamine, norepinephrine, and serotonin. Mutation of this gene results in Brunner syndrome. This gene has also been associated with a variety of other psychiatric disorders, including antisocial behavior. Alternatively spliced transcript variants encoding multiple isoforms have been observed. [provided by RefSeq, Jul 2012]

MAOA Gene-Disease associations (from GenCC):

Brunner syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, ClinGen, Labcorp Genetics (formerly Invitae)

MAOA links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20642385).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAOA	NM_000240.4 link	c.515G>T	p.Arg172Leu	missense_variant	Exon 6 of 15	ENST00000338702.4	NP_000231.1
MAOA	NM_001270458.2 link	c.116G>T	p.Arg39Leu	missense_variant	Exon 7 of 16		NP_001257387.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MAOA	ENST00000338702.4 link	c.515G>T	p.Arg172Leu	missense_variant	Exon 6 of 15	1	NM_000240.4	ENSP00000340684.3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

9.11e-7

AC:

AN:

1097212

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

362620

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26386

American (AMR)

AF:

0.00

AC:

AN:

35206

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19380

East Asian (EAS)

AF:

0.00

AC:

AN:

30202

South Asian (SAS)

AF:

0.00

AC:

AN:

54116

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40529

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4135

European-Non Finnish (NFE)

AF:

0.00000119

AC:

AN:

841183

Other (OTH)

AF:

0.00

AC:

AN:

46075

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.088

BayesDel_noAF

Benign

-0.36

CADD

Benign

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.0

.;D

FATHMM_MKL

Benign

0.19

LIST_S2

Uncertain

0.93

D;D

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.21

T;T

MetaSVM

Benign

-0.35

MutationAssessor

Benign

0.0

.;L

PhyloP100

1.1

PrimateAI

Benign

0.23

PROVEAN

Uncertain

-3.6

D;D

REVEL

Benign

0.18

Sift

Benign

0.091

T;D

Sift4G

Benign

0.12

T;T

Vest4

0.28

ClinPred

0.11

GERP RS

-2.7

Varity_R

0.33

gMVP

0.67

Mutation Taster

=84/16

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over