NM_022746.4:c.493A>C

Variant names:

• chr1-220796686-A-C
• rs2642438
• NM_022746.4:c.493A>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_022746.4(MTARC1):​c.493A>C​(p.Thr165Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MTARC1 NM_022746.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.91
• Publications: 153 publications found

Genes affected

MTARC1 (HGNC:26189): (mitochondrial amidoxime reducing component 1) Enables molybdenum ion binding activity; molybdopterin cofactor binding activity; and oxidoreductase activity, acting on other nitrogenous compounds as donors. Contributes to nitrite reductase (NO-forming) activity. Involved in cellular detoxification of nitrogen compound; nitrate metabolic process; and nitric oxide biosynthetic process. Located in mitochondrion. Part of nitric-oxide synthase complex. [provided by Alliance of Genome Resources, Apr 2022]

ENSG00000286231 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022746.4. 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
	MTARC1	NM_022746.4	MANE Select	c.493A>C	p.Thr165Pro	missense	Exon 3 of 7	NP_073583.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MTARC1	ENST00000366910.10	TSL:1 MANE Select	c.493A>C	p.Thr165Pro	missense	Exon 3 of 7	ENSP00000355877.5
	ENSG00000286231	ENST00000651706.1		n.448A>C		non_coding_transcript_exon	Exon 3 of 9	ENSP00000499157.1
	MTARC1	ENST00000694919.1		c.493A>C	p.Thr165Pro	missense	Exon 3 of 8	ENSP00000511594.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 63

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	18
DANN	Benign	0.96
DEOGEN2	Benign	0.0098	T
Eigen	Benign	-0.73
Eigen_PC	Benign	-0.69
FATHMM_MKL	Benign	0.44	N
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.016	T
MetaRNN	Uncertain	0.49	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.20	N
PhyloP100		3.9
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.23
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.060	T
Polyphen		0.012	B
Vest4		0.22
MutPred		0.81		Gain of glycosylation at T165 (P = 0.0432)
MVP		0.18
MPC		0.22
ClinPred		0.64	D
GERP RS		3.9
PromoterAI		-0.0026	Neutral
Varity_R		0.27
gMVP		0.75
Mutation Taster		=83/17	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

dbSNP: rs2642438; hg19: chr1-220970028;