2-240871444-C-G

Variant names:

• chr2-240871444-C-G
• rs180177232
• NM_000030.3:c.519C>G

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP2 PP3_Strong

The ENST00000307503.4(AGXT):​c.519C>G​(p.Cys173Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000139 in 1,434,116 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C173Y) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: AGXT ENST00000307503.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.346
• Publications: 3 publications found

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

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in ENST00000307503.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr2-240871443-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 204108.Status of the report is no_assertion_criteria_provided, 0 stars.
• 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

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000307503.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGXT	NM_000030.3	MANE Select	c.519C>G	p.Cys173Trp	missense	Exon 4 of 11	NP_000021.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGXT	ENST00000307503.4	TSL:1 MANE Select	c.519C>G	p.Cys173Trp	missense	Exon 4 of 11	ENSP00000302620.3
	AGXT	ENST00000472436.1	TSL:2	n.539C>G		non_coding_transcript_exon	Exon 4 of 5
	AGXT	ENST00000476698.1	TSL:5	n.256C>G		non_coding_transcript_exon	Exon 1 of 4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000496 AC: 1 AN: 201644 AF XY: 0.00000922

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1434116 Hom.: 0 Cov.: 31 AF XY: 0.00000281 AC XY: 2 AN XY: 710814

African (AFR) AF: 0.00 AC: 0 AN: 32928

American (AMR) AF: 0.00 AC: 0 AN: 40918

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25602

East Asian (EAS) AF: 0.00 AC: 0 AN: 38366

South Asian (SAS) AF: 0.0000244 AC: 2 AN: 81908

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50508

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5700

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1098830

Other (OTH) AF: 0.00 AC: 0 AN: 59356

GnomAD4 genome Cov.: 33

ExAC AF: 0.0000167 AC: 2

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.44
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.96	D
Eigen	Uncertain	0.33
Eigen_PC	Benign	0.14
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.89	D
M_CAP	Pathogenic	0.95	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.86	D
MutationAssessor	Pathogenic	3.9	H
PhyloP100		0.35
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-9.9	D
REVEL	Pathogenic	0.82
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.80
MutPred		0.80		Gain of catalytic residue at C173 (P = 0.0632)
MVP		1.0
MPC		0.28
ClinPred		1.0	D
GERP RS		2.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.97
gMVP		0.96
Mutation Taster		=6/94	disease causing

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

Other links and lift over

dbSNP: rs180177232; hg19: chr2-241810861;