NM_031900.4:c.1451C>A

Variant names:

• chr5-34998813-G-T
• rs139418234
• NM_031900.4:c.1451C>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_031900.4(AGXT2):​c.1451C>A​(p.Ala484Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,730 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A484V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: AGXT2 NM_031900.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.39
• Publications: 0 publications found

Genes affected

AGXT2 (HGNC:14412): (alanine--glyoxylate aminotransferase 2) The protein encoded by this gene is a class III pyridoxal-phosphate-dependent mitochondrial aminotransferase. It catalyzes the conversion of glyoxylate to glycine using L-alanine as the amino donor. It is an important regulator of methylarginines and is involved in the control of blood pressure in kidney. Polymorphisms in this gene affect methylarginine and beta-aminoisobutyrate metabolism, and are associated with carotid atherosclerosis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031900.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGXT2	NM_031900.4	MANE Select	c.1451C>A	p.Ala484Glu	missense	Exon 14 of 14	NP_114106.1	Q9BYV1-1
	AGXT2	NM_001438583.1		c.1448C>A	p.Ala483Glu	missense	Exon 14 of 14	NP_001425512.1
	AGXT2	NM_001438584.1		c.1256C>A	p.Ala419Glu	missense	Exon 12 of 12	NP_001425513.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGXT2	ENST00000231420.11	TSL:1 MANE Select	c.1451C>A	p.Ala484Glu	missense	Exon 14 of 14	ENSP00000231420.6	Q9BYV1-1
	AGXT2	ENST00000510428.1	TSL:1	c.1226C>A	p.Ala409Glu	missense	Exon 12 of 13	ENSP00000422799.1	Q9BYV1-2
	AGXT2	ENST00000853198.1		c.1532C>A	p.Ala511Glu	missense	Exon 15 of 15	ENSP00000523257.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460730 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 726754

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33470

American (AMR) AF: 0.0000224 AC: 1 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39690

South Asian (SAS) AF: 0.00 AC: 0 AN: 86226

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52934

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111416

Other (OTH) AF: 0.00 AC: 0 AN: 60372

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.65
BayesDel_addAF	Uncertain	0.094	D
BayesDel_noAF	Benign	-0.10
CADD	Benign	19
DANN	Benign	0.95
DEOGEN2	Benign	0.11	T
Eigen	Benign	-0.091
Eigen_PC	Benign	-0.13
FATHMM_MKL	Benign	0.14	N
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.018	T
MetaRNN	Uncertain	0.44	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		1.4
PrimateAI	Benign	0.36	T
PROVEAN	Benign	1.1	N
REVEL	Benign	0.20
Sift	Benign	0.030	D
Sift4G	Uncertain	0.027	D
Polyphen		0.45	B
Vest4		0.49
MutPred		0.63		Loss of MoRF binding (P = 0.0915)
MVP		0.54
MPC		0.087
ClinPred		0.83	D
GERP RS		3.6
Varity_R		0.16
gMVP		0.80
Mutation Taster		=79/21	polymorphism

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: rs139418234; hg19: chr5-34998918; COSMIC: COSV99183720;