rs143389339

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000481.4(AMT):c.100C>T(p.Arg34Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000044 in 1,613,882 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000047 ( 0 hom. )

Consequence

AMT
NM_000481.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.31

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 links:

ENSG00000283189 (HGNC:):

ENSG00000283189 links:

NICN1 (HGNC:18317): (nicolin 1, tubulin polyglutamylase complex subunit) This protein encoded by this gene localizes to the nucleus and is expressed in numerous tissues including brain, testis, liver, and kidney. This refseq contains genomic sequence in its 3' UTR which is not supported by experimental evidence. Computer predictions indicate that this region of the 3' UTR contains hairpin-forming self-complementary sequence which is possibly excised after transcription. This gene has a pseudogene on chromosome X. [provided by RefSeq, Jul 2008]

NICN1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AMT	NM_000481.4 link	c.100C>T	p.Arg34Cys	missense_variant	Exon 2 of 9	ENST00000273588.9	NP_000472.2	P48728-1A0A024R2U7
NICN1	NM_032316.3 link	c.*2571C>T		downstream_gene_variant		ENST00000273598.8	NP_115692.1	Q9BSH3-1B2R7Q3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
AMT	ENST00000273588.9 link	c.100C>T	p.Arg34Cys	missense_variant	Exon 2 of 9	1	NM_000481.4	ENSP00000273588.3	P48728-1
ENSG00000283189	ENST00000636166.1 link	c.496-690C>T		intron_variant	Intron 4 of 10	5		ENSP00000490106.1	A0A1B0GUH1
NICN1	ENST00000273598.8 link	c.*2571C>T		downstream_gene_variant		1	NM_032316.3	ENSP00000273598.4	Q9BSH3-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251202

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135818

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000465

AC:

AN:

1461708

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

727148

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000540

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000658

Hom.:

Bravo

AF:

0.0000189

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Glycine encephalopathy

Uncertain:2

Oct 28, 2019

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jul 05, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 34 of the AMT protein (p.Arg34Cys). This variant is present in population databases (rs143389339, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with AMT-related conditions. ClinVar contains an entry for this variant (Variation ID: 581326). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Inborn genetic diseases

Uncertain:1

Jul 19, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.100C>T (p.R34C) alteration is located in exon 2 (coding exon 2) of the AMT gene. This alteration results from a C to T substitution at nucleotide position 100, causing the arginine (R) at amino acid position 34 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Uncertain

-0.060

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.81

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

Eigen

Benign

-0.080

Eigen_PC

Benign

-0.23

FATHMM_MKL

Benign

0.56

LIST_S2

Pathogenic

0.98

D;D;D;D;D;D;D;D

M_CAP

Uncertain

0.28

MetaRNN

Uncertain

0.48

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

MetaSVM

Uncertain

0.17

MutationAssessor

Pathogenic

3.1

M;.;M;M;.;.;.;.

PrimateAI

Uncertain

0.61

PROVEAN

Uncertain

-4.1

D;.;D;D;.;.;.;.

REVEL

Uncertain

0.47

Sift

Uncertain

0.0010

D;.;D;D;.;.;.;.

Sift4G

Uncertain

0.0040

D;.;D;D;.;.;.;.

Polyphen

1.0

D;.;.;.;.;.;.;.

Vest4

0.43

MVP

0.93

MPC

0.81

ClinPred

0.97

GERP RS

0.64

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.3

Varity_R

0.71

gMVP

0.64

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over