dbSNP rs1553638253: AMT:p.Lys343Asn (chr3-49417822-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000481.4(AMT):c.1029G>C(p.Lys343Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,840 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. K343K) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

AMT
NM_000481.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.0900

Publications

0 publications found

Variant links:

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]

AMT Gene-Disease associations (from GenCC):

glycine encephalopathy
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Myriad Women’s Health
glycine encephalopathy 2
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
infantile glycine encephalopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
neonatal glycine encephalopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
atypical glycine encephalopathy
Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet

AMT links:

ENSG00000283189 (HGNC:):

ENSG00000283189 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.103943884).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AMT	NM_000481.4 link	c.1029G>C	p.Lys343Asn	missense_variant	Exon 8 of 9	ENST00000273588.9	NP_000472.2	P48728-1A0A024R2U7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AMT	ENST00000273588.9 link	c.1029G>C	p.Lys343Asn	missense_variant	Exon 8 of 9	1	NM_000481.4	ENSP00000273588.3		P48728-1
ENSG00000283189	ENST00000636166.1 link	c.1266G>C	p.Lys422Asn	missense_variant	Exon 10 of 11	5		ENSP00000490106.1		A0A1B0GUH1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461840

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727210

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53370

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.675

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.46

CADD

Benign

(source)

DANN

Benign

0.87

DEOGEN2

Uncertain

0.73

D;T;.;.;T;T;.;.;T;T;.;.

Eigen

Benign

-0.72

Eigen_PC

Benign

-0.66

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.62

T;T;T;T;T;T;T;T;T;T;T;T

M_CAP

Uncertain

0.094

MetaRNN

Benign

0.10

T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

0.85

L;.;L;.;.;.;.;.;.;.;.;.

PhyloP100

0.090

PrimateAI

Benign

0.31

PROVEAN

Benign

-1.7

N;.;N;N;.;.;.;.;.;.;.;.

REVEL

Benign

0.15

Sift

Benign

0.49

T;.;T;T;.;.;.;.;.;.;.;.

Sift4G

Benign

0.46

T;.;T;T;.;.;.;.;.;.;.;.

Polyphen

0.0

B;.;.;.;.;.;.;.;.;.;.;.

Vest4

0.064

MutPred

0.49

Loss of ubiquitination at K343 (P = 0.0161);.;Loss of ubiquitination at K343 (P = 0.0161);.;.;.;.;.;.;.;.;.;

MVP

0.76

MPC

0.24

ClinPred

0.024

GERP RS

1.8

Varity_R

0.26

gMVP

0.69

Mutation Taster

=86/14

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over