10-80271961-C-T

Variant names:

Variant summary

Our verdict is The variant received -3 classification points (ACMG Germline Pathogenicity v2019). PM2_SupportingBP4_Strong

The NM_000429.3(MAT1A):c.*1820G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a cumulative frequency of 0.00025 (AC=38) in the gnomAD database across 152,236 control chromosomes (no homozygotes observed). The grpmax filtering allele frequency (95% CI) is 0.000061. In-silico predictor (BayesDel (noAF)) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain Significance (★).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

MAT1A
NM_000429.3 3_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.21

Publications

0 publications found

Variant links:

Genes affected

MAT1A (HGNC:6903): (methionine adenosyltransferase 1A) This gene catalyzes a two-step reaction that involves the transfer of the adenosyl moiety of ATP to methionine to form S-adenosylmethionine and tripolyphosphate, which is subsequently cleaved to PPi and Pi. S-adenosylmethionine is the source of methyl groups for most biological methylations. The encoded protein is found as a homotetramer (MAT I) or a homodimer (MAT III) whereas a third form, MAT II (gamma), is encoded by the MAT2A gene. Mutations in this gene are associated with methionine adenosyltransferase deficiency. [provided by RefSeq, Jul 2008]

MAT1A Gene-Disease associations (from GenCC):

methionine adenosyltransferase deficiency
Inheritance: AR, AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, PanelApp Australia, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet, G2P

MAT1A links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_000429.3, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

Classification according to ACMG Germline Pathogenicity v2019

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 points.

PM2

Rare in gnomAD for AD/XL gene (popmax AF below threshold) — PM2 Supporting; GnomAD popmax AF = 0.000061 — borderline rare for AD+AR gene (threshold 0.0001) — PM2 supporting.

BP4

Computational evidence supports benign — no pathogenic computational or splicing signal (BP4); Splicing verdict: benign (Strong).; Germline computational verdict: benign (Strong).

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_000429.3. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAT1A	NM_000429.3	MANE Select	c.*1820G>A		3_prime_UTR	Exon 9 of 9	NP_000420.1	Q00266

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
MAT1A	ENST00000372213.8	TSL:1 MANE Select	c.*1820G>A	3_prime_UTR	Exon 9 of 9	ENSP00000361287.3	Q00266
MAT1A	ENST00000871627.1		c.*1820G>A	3_prime_UTR	Exon 9 of 9	ENSP00000541686.1	A0ACI8QDF3
MAT1A	ENST00000871624.1		c.*1820G>A	3_prime_UTR	Exon 9 of 9	ENSP00000541683.1	A0ACI8PRD3

Frequencies

GnomAD3 genomes

AF:

0.000244

AC:

AN:

152114

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000305

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00780

Gnomad EAS

AF:

0.000198

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000137

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

African (AFR)

AC:

AN:

American (AMR)

AC:

AN:

Ashkenazi Jewish (ASJ)

AC:

AN:

East Asian (EAS)

AC:

AN:

South Asian (SAS)

AC:

AN:

European-Finnish (FIN)

AC:

AN:

Middle Eastern (MID)

AC:

AN:

European-Non Finnish (NFE)

AC:

AN:

Other (OTH)

AF:

0.00

AC:

AN:

GnomAD4 genome

AF:

0.000244

AC:

AN:

152236

Hom.:

Cov.:

AF XY:

0.000214

AC XY:

AN XY:

74426

show subpopulations

African (AFR)

AF:

0.0000305

AC:

AN:

41550

American (AMR)

AF:

0.00

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00780

AC:

AN:

3466

East Asian (EAS)

AF:

0.000198

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000137

AC:

AN:

67990

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000351

Hom.:

Bravo

AF:

0.000259

Local populations

ToMMo 61KJPN (+60KJPN MNV)

AF:

0.000994

AC:

122

AN:

122726

Turkish Variome

AF:

0.000648

AC:

AN:

1544

Hom.:

ABraOM SABE-WGS-1171

AF:

0.000427

AC:

AN:

2342

Hom.:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Hepatic methionine adenosyltransferase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

0.0020

(source)

DANN

Benign

0.39

PhyloP100

-1.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

Classification according to ACMG Germline Pathogenicity v2019

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Local populations

ClinVar

Computational scores

Splicing

Publications

Other links and lift over