NM_000030.3:c.757T>C

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 17 ACMG points: 17P and 0B. PM1PM2PP2PP3_StrongPP5_Very_Strong

The NM_000030.3(AGXT):c.757T>C(p.Cys253Arg) variant causes a missense change. The variant allele was found at a frequency of 0.0000109 in 1,461,224 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 Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. C253C) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

AGXT
NM_000030.3 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 5.46

Publications

3 publications found

Variant links:

Genes affected

AGXT (HGNC:341): (alanine--glyoxylate aminotransferase) This gene is expressed only in the liver and the encoded protein is localized mostly in the peroxisomes, where it is involved in glyoxylate detoxification. Mutations in this gene, some of which alter subcellular targetting, have been associated with type I primary hyperoxaluria. [provided by RefSeq, Jul 2008]

AGXT Gene-Disease associations (from GenCC):

alanine glyoxylate aminotransferase deficiency
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
primary hyperoxaluria type 1
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Myriad Women’s Health, Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet

AGXT links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 17 ACMG points.

PM1

In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 5 uncertain in NM_000030.3

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 130 curated pathogenic missense variants (we use a threshold of 10). The gene has 12 curated benign missense variants. Gene score misZ: -0.26789 (below the threshold of 3.09). Trascript score misZ: -0.48778 (below the threshold of 3.09). GenCC associations: The gene is linked to alanine glyoxylate aminotransferase deficiency, primary hyperoxaluria type 1.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.984

PP5

Variant 2-240875185-T-C is Pathogenic according to our data. Variant chr2-240875185-T-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 204126.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGXT	NM_000030.3 link	c.757T>C	p.Cys253Arg	missense_variant	Exon 7 of 11	ENST00000307503.4	NP_000021.1	P21549

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AGXT	ENST00000307503.4 link	c.757T>C	p.Cys253Arg	missense_variant	Exon 7 of 11	1	NM_000030.3	ENSP00000302620.3		P21549
AGXT	ENST00000476698.1 link	n.409T>C		non_coding_transcript_exon_variant	Exon 3 of 4	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251370

AF XY:

0.00000736

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000109

AC:

AN:

1461224

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

726964

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33458

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86244

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53352

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000144

AC:

AN:

1111496

Other (OTH)

AF:

0.00

AC:

AN:

60368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Primary hyperoxaluria, type I

Pathogenic:2

Oct 29, 2022

Baylor Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 27, 2014

Clinical Biochemistry Laboratory, Health Services Laboratory

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:in vitro

- -

not provided

Pathogenic:1

Mar 02, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

For these reasons, this variant has been classified as Pathogenic. This sequence change replaces cysteine, which is neutral and slightly polar, with arginine, which is basic and polar, at codon 253 of the AGXT protein (p.Cys253Arg). This variant is present in population databases (rs180177264, gnomAD 0.0009%). This missense change has been observed in individual(s) with Primary Hyperoxaluria Type 1 (PMID: 15849466, 17495019). ClinVar contains an entry for this variant (Variation ID: 204126). 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 AGXT protein function. Experimental studies have shown that this missense change affects AGXT function (PMID: 17495019, 22923379, 24718375). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.73

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.33

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.76

Eigen

Uncertain

0.22

Eigen_PC

Benign

0.18

FATHMM_MKL

Benign

0.64

LIST_S2

Uncertain

0.89

M_CAP

Pathogenic

0.79

MetaRNN

Pathogenic

0.98

MetaSVM

Uncertain

0.16

MutationAssessor

Uncertain

2.6

PhyloP100

5.5

PrimateAI

Benign

0.44

PROVEAN

Pathogenic

-9.2

REVEL

Pathogenic

0.75

Sift

Uncertain

0.0020

Sift4G

Benign

0.098

Polyphen

1.0

Vest4

0.91

MutPred

0.80

Gain of disorder (P = 0.0106);

MVP

0.96

MPC

0.30

ClinPred

1.0

GERP RS

3.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.90

gMVP

0.94

Mutation Taster

=39/61

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over