NM_005911.6:c.12G>C

Variant names:

• chr2-85539299-G-C
• NM_005911.6:c.12G>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_005911.6(MAT2A):​c.12G>C​(p.Gln4His) 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 benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q4R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MAT2A NM_005911.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.652
• Publications: 0 publications found

Genes affected

MAT2A (HGNC:6904): (methionine adenosyltransferase 2A) The protein encoded by this gene catalyzes the production of S-adenosylmethionine (AdoMet) from methionine and ATP. AdoMet is the key methyl donor in cellular processes. [provided by RefSeq, Jun 2011]

PARTICL (HGNC:50886): (promoter of MAT2A antisense radiation-induced circulating long non-coding RNA)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3238082).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAT2A	NM_005911.6	c.12G>C	p.Gln4His	missense_variant	Exon 1 of 9	ENST00000306434.8	NP_005902.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MAT2A	ENST00000306434.8	c.12G>C	p.Gln4His	missense_variant	Exon 1 of 9	1	NM_005911.6	ENSP00000303147.3
MAT2A	ENST00000465151.5	n.132G>C		non_coding_transcript_exon_variant	Exon 1 of 2	2
MAT2A	ENST00000469221.5	n.132G>C		non_coding_transcript_exon_variant	Exon 1 of 3	2
PARTICL	ENST00000667933.3	n.-189C>G		upstream_gene_variant

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cardiovascular phenotype Uncertain:1

Jun 01, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Q4H variant (also known as c.12G>C), located in coding exon 1 of the MAT2A gene, results from a G to C substitution at nucleotide position 12. The glutamine at codon 4 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Benign	18
DANN	Uncertain	0.98
DEOGEN2	Benign	0.16	T
Eigen	Benign	-0.25
Eigen_PC	Benign	-0.086
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.80	T
M_CAP	Pathogenic	0.70	D
MetaRNN	Benign	0.32	T
MetaSVM	Uncertain	0.10	D
MutationAssessor	Benign	1.1	L
PhyloP100		0.65
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-0.050	N
REVEL	Uncertain	0.40
Sift	Benign	0.55	T
Sift4G	Benign	0.20	T
Polyphen		0.0	B
Vest4		0.46
MutPred		0.17		Gain of disorder (P = 0.1627);
MVP		0.73
MPC		1.1
ClinPred		0.38	T
GERP RS		3.8
PromoterAI		0.061	Neutral
Varity_R		0.076
gMVP		0.75
Mutation Taster		=83/17	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: chr2-85766422;