Genetic Variant AGXT:p.Gln303Lys (chr2-240877597-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2PP2BP4

The NM_000030.3(AGXT):c.907C>A(p.Gln303Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000715 in 1,398,596 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 7.2e-7 ( 0 hom. )

Consequence

AGXT
NM_000030.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.10

Publications

0 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:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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.

BP4

Computational evidence support a benign effect (MetaRNN=0.3992013).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGXT	NM_000030.3 link	c.907C>A	p.Gln303Lys	missense_variant	Exon 9 of 11	ENST00000307503.4	NP_000021.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AGXT	ENST00000307503.4 link	c.907C>A	p.Gln303Lys	missense_variant	Exon 9 of 11	1	NM_000030.3	ENSP00000302620.3
AGXT	ENST00000470255.1 link	n.685C>A		non_coding_transcript_exon_variant	Exon 1 of 3	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.15e-7

AC:

AN:

1398596

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

689894

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31622

American (AMR)

AF:

0.00

AC:

AN:

35690

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25168

East Asian (EAS)

AF:

0.00

AC:

AN:

35780

South Asian (SAS)

AF:

0.00

AC:

AN:

79250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48422

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5700

European-Non Finnish (NFE)

AF:

9.27e-7

AC:

AN:

1078958

Other (OTH)

AF:

0.00

AC:

AN:

58006

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.098

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

-0.040

CADD

Benign

(source)

DANN

Benign

0.89

DEOGEN2

Benign

0.38

Eigen

Benign

-0.38

Eigen_PC

Benign

-0.28

FATHMM_MKL

Benign

0.61

LIST_S2

Benign

0.71

M_CAP

Uncertain

0.23

MetaRNN

Benign

0.40

MetaSVM

Uncertain

-0.12

MutationAssessor

Benign

0.74

PhyloP100

2.1

PrimateAI

Benign

0.41

PROVEAN

Benign

-1.4

REVEL

Uncertain

0.49

Sift

Benign

0.16

Sift4G

Benign

0.28

Polyphen

0.0050

Vest4

0.29

MutPred

0.51

Gain of ubiquitination at Q303 (P = 0.0494);

MVP

0.86

MPC

0.039

ClinPred

0.18

GERP RS

4.6

Varity_R

0.51

gMVP

0.88

Mutation Taster

=75/25

polymorphism

(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

Computational scores

Splicing

Publications

Other links and lift over