NM_001368809.2:c.-45C>T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_001368809.2(AMPD2):c.-45C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000188 in 1,598,362 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

AMPD2
NM_001368809.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: -0.0470

Variant links:

Genes affected

AMPD2 (HGNC:469): (adenosine monophosphate deaminase 2) The protein encoded by this gene is important in purine metabolism by converting AMP to IMP. The encoded protein, which acts as a homotetramer, is one of three AMP deaminases found in mammals. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

AMPD2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06566954).

BP6

Variant 1-109621131-C-T is Benign according to our data. Variant chr1-109621131-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 2148906.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AMPD2	NM_001368809.2 link	c.-45C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 2 of 19	ENST00000528667.7	NP_001355738.1
AMPD2	NM_001368809.2 link	c.-45C>T		5_prime_UTR_variant	Exon 2 of 19	ENST00000528667.7	NP_001355738.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AMPD2	ENST00000528667 link	c.-45C>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 2 of 19	1	NM_001368809.2	ENSP00000436541.2
AMPD2	ENST00000528667 link	c.-45C>T		5_prime_UTR_variant	Exon 2 of 19	1	NM_001368809.2	ENSP00000436541.2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152136

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000138

AC:

AN:

1446226

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

718544

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000181

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152136

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74308

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000658

Hom.:

Bravo

AF:

0.0000113

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 63;C4014354:Pontocerebellar hypoplasia type 9

Uncertain:1

Jan 16, 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 tryptophan, which is neutral and slightly polar, at codon 40 of the AMPD2 protein (p.Arg40Trp). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with AMPD2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The tryptophan amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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

Benign:1

Jun 21, 2022

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.023

BayesDel_noAF

Benign

-0.27

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.22

T;T

Eigen

Benign

-0.83

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.16

LIST_S2

Benign

0.61

.;T

M_CAP

Benign

0.080

MetaRNN

Benign

0.066

T;T

MetaSVM

Benign

-0.97

PrimateAI

Benign

0.37

PROVEAN

Benign

-0.080

N;N

REVEL

Benign

0.20

Sift

Uncertain

0.013

D;D

Sift4G

Uncertain

0.044

D;D

Polyphen

0.0

B;B

Vest4

0.071

MutPred

0.27

Loss of glycosylation at S39 (P = 0.0293);Loss of glycosylation at S39 (P = 0.0293);

MVP

0.62

MPC

0.95

ClinPred

0.46

GERP RS

-1.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.066

gMVP

0.16

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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