Genetic Variant ADSS2:p.Ala349Thr (chr1-244417653-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001126.5(ADSS2):c.1045G>A(p.Ala349Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,156 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

ADSS2
NM_001126.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.57

Variant links:

Genes affected

ADSS2 (HGNC:292): (adenylosuccinate synthase 2) This gene encodes the enzyme adenylosuccinate synthetase which catalyzes the first committed step in the conversion of inosine monophosphate to adenosine monophosphate. A pseudogene of this gene is found on chromosome 17.[provided by RefSeq, Nov 2010]

ADSS2 links:

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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
ADSS2	NM_001126.5 link	c.1045G>A	p.Ala349Thr	missense_variant	Exon 10 of 13	ENST00000366535.4	NP_001117.2	P30520A0A024R5Q7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ADSS2	ENST00000366535.4 link	c.1045G>A	p.Ala349Thr	missense_variant	Exon 10 of 13	1	NM_001126.5	ENSP00000355493.3		P30520
ADSS2	ENST00000468215.1 link	n.614G>A		non_coding_transcript_exon_variant	Exon 2 of 4	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250862

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135610

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.00000883

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460156

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726416

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:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 29, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1045G>A (p.A349T) alteration is located in exon 10 (coding exon 10) of the ADSS gene. This alteration results from a G to A substitution at nucleotide position 1045, causing the alanine (A) at amino acid position 349 to be replaced by a threonine (T). 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

0.12

BayesDel_addAF

Benign

-0.0037

BayesDel_noAF

Benign

-0.24

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.088

Eigen

Benign

0.17

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Pathogenic

0.98

M_CAP

Benign

0.022

MetaRNN

Uncertain

0.62

MetaSVM

Benign

-0.99

MutationAssessor

Uncertain

2.3

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-0.28

REVEL

Benign

0.16

Sift

Benign

0.28

Sift4G

Benign

0.37

Polyphen

0.073

Vest4

0.65

MutPred

0.82

Loss of catalytic residue at A349 (P = 0.0944);

MVP

0.14

MPC

1.1

ClinPred

0.69

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.33

gMVP

0.91

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

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