NM_000240.4:c.56T>C

Variant names:

• chrX-43656397-T-C
• NM_000240.4:c.56T>C

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000240.4(MAOA):​c.56T>C​(p.Ile19Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 22)
• Consequence: MAOA NM_000240.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.85
• Publications: 0 publications found

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: Labcorp Genetics (formerly Invitae), Orphanet, ClinGen, G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.815

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000240.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAOA	NM_000240.4	MANE Select	c.56T>C	p.Ile19Thr	missense	Exon 1 of 15	NP_000231.1	Q53YE7
	MAOA	NM_001270458.2		c.-452T>C		5_prime_UTR	Exon 1 of 16	NP_001257387.1	P21397-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAOA	ENST00000338702.4	TSL:1 MANE Select	c.56T>C	p.Ile19Thr	missense	Exon 1 of 15	ENSP00000340684.3	P21397-1
	MAOA	ENST00000967111.1		c.56T>C	p.Ile19Thr	missense	Exon 1 of 15	ENSP00000637170.1
	MAOA	ENST00000873971.1		c.56T>C	p.Ile19Thr	missense	Exon 1 of 15	ENSP00000544030.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Brunner syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.38
BayesDel_addAF	Uncertain	0.054	T
BayesDel_noAF	Benign	-0.16
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	D
FATHMM_MKL	Benign	0.68	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Benign	0.059	D
MetaRNN	Pathogenic	0.81	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Pathogenic	3.1	M
PhyloP100		2.9
PrimateAI	Pathogenic	0.81	D
PROVEAN	Uncertain	-3.1	D
REVEL	Uncertain	0.33
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0040	D
Polyphen		1.0	D
Vest4		0.72
MutPred		0.72		Loss of stability (P = 0.0129)
MVP		0.66
MPC		1.8
ClinPred		0.98	D
GERP RS		4.1
PromoterAI		-0.0070	Neutral
Varity_R		0.96
gMVP		0.99
Mutation Taster		=53/47	polymorphism

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

Other links and lift over

hg19: chrX-43515645;