3-49417562-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000481.4(AMT):c.1190C>A(p.Thr397Lys) variant causes a missense change involving the alteration of a 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 (★). Synonymous variant affecting the same amino acid position (i.e. T397T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: AMT NM_000481.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.85

Genes affected

AMT (HGNC:473): (aminomethyltransferase) This gene encodes one of four critical components of the glycine cleavage system. Mutations in this gene have been associated with glycine encephalopathy. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.745

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AMT	NM_000481.4	c.1190C>A	p.Thr397Lys	missense_variant	9/9	ENST00000273588.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AMT	ENST00000273588.9	c.1190C>A	p.Thr397Lys	missense_variant	9/9	1	NM_000481.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Non-ketotic hyperglycinemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.43
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
Cadd	Benign	23
Dann	Benign	0.95
DEOGEN2	Uncertain	0.69	D;T;.;T;T;T;.;T;.;.
Eigen	Benign	0.11
Eigen_PC	Benign	0.039
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.090	D
MetaRNN	Pathogenic	0.74	D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.15	T
MutationAssessor	Benign	1.0	L;.;.;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-3.9	D;.;D;.;.;.;.;.;.;.
REVEL	Uncertain	0.57
Sift	Uncertain	0.0030	D;.;D;.;.;.;.;.;.;.
Sift4G	Benign	0.061	T;.;T;.;.;.;.;.;.;.
Polyphen		0.99	D;.;.;.;.;.;.;.;.;.
Vest4		0.68
MutPred		0.46		Gain of methylation at T397 (P = 0.0012);.;.;.;.;.;.;.;.;.;
MVP		0.89
MPC		0.47
ClinPred		0.98	D
GERP RS		4.3
Varity_R		0.79
gMVP		0.72

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

Publications

LitVar

Other links and lift over

dbSNP: rs886058683; hg19: chr3-49454995;