rs999093646

Positions:

chr2-27232672-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2PP2PP3_Moderate

The NM_004341.5(CAD):c.2870G>T(p.Gly957Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000805 in 1,614,092 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. G957G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

CAD
NM_004341.5 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 7.05

Variant links:

Genes affected

CAD (HGNC:1424): (carbamoyl-phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase) The de novo synthesis of pyrimidine nucleotides is required for mammalian cells to proliferate. This gene encodes a trifunctional protein which is associated with the enzymatic activities of the first 3 enzymes in the 6-step pathway of pyrimidine biosynthesis: carbamoylphosphate synthetase (CPS II), aspartate transcarbamoylase, and dihydroorotase. This protein is regulated by the mitogen-activated protein kinase (MAPK) cascade, which indicates a direct link between activation of the MAPK cascade and de novo biosynthesis of pyrimidine nucleotides. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Apr 2015]

CAD links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, CAD

PP3

MetaRNN computational evidence supports a deleterious effect, 0.867

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CAD	NM_004341.5 linkuse as main transcript	c.2870G>T	p.Gly957Val	missense_variant	18/44	ENST00000264705.9
CAD	NM_001306079.2 linkuse as main transcript	c.2681G>T	p.Gly894Val	missense_variant	17/43
CAD	XM_047445803.1 linkuse as main transcript	c.2870G>T	p.Gly957Val	missense_variant	18/45
CAD	XM_006712101.4 linkuse as main transcript	c.2681G>T	p.Gly894Val	missense_variant	17/44

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
CAD	ENST00000264705.9 linkuse as main transcript	c.2870G>T	p.Gly957Val	missense_variant	18/44	1	NM_004341.5	P1
CAD	ENST00000403525.5 linkuse as main transcript	c.2681G>T	p.Gly894Val	missense_variant	17/43	1
CAD	ENST00000464159.1 linkuse as main transcript			downstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, no assertion criteria provided	research	Gharavi Laboratory, Columbia University	Sep 16, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Sep 19, 2022	This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 957 of the CAD protein (p.Gly957Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CAD-related conditions. ClinVar contains an entry for this variant (Variation ID: 591744). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt CAD 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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 07, 2022

The c.2870G>T (p.G957V) alteration is located in exon 18 (coding exon 18) of the CAD gene. This alteration results from a G to T substitution at nucleotide position 2870, causing the glycine (G) at amino acid position 957 to be replaced by a valine (V). 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

Pathogenic

0.62

BayesDel_addAF

Pathogenic

0.52

BayesDel_noAF

Pathogenic

0.51

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.35

T;T

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.95

D;D

M_CAP

Uncertain

0.21

MetaRNN

Pathogenic

0.87

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.8

M;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-6.7

D;D

REVEL

Pathogenic

0.89

Sift

Benign

0.053

T;D

Sift4G

Uncertain

0.054

T;T

Polyphen

0.99

D;P

Vest4

0.96

MutPred

0.60

Gain of catalytic residue at G957 (P = 0.0806);.;

MVP

0.97

MPC

2.2

ClinPred

0.99

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.77

gMVP

0.95

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