NM_000045.4:c.32T>C

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong

The NM_000045.4(ARG1):c.32T>C(p.Ile11Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000031 in 1,613,948 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 (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

ARG1
NM_000045.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5

Conservation

PhyloP100: 5.62

Variant links:

Genes affected

ARG1 (HGNC:663): (arginase 1) Arginase catalyzes the hydrolysis of arginine to ornithine and urea. At least two isoforms of mammalian arginase exist (types I and II) which differ in their tissue distribution, subcellular localization, immunologic crossreactivity and physiologic function. The type I isoform encoded by this gene, is a cytosolic enzyme and expressed predominantly in the liver as a component of the urea cycle. Inherited deficiency of this enzyme results in argininemia, an autosomal recessive disorder characterized by hyperammonemia. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

ARG1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.984

PP5

Variant 6-131573314-T-C is Pathogenic according to our data. Variant chr6-131573314-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2393.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-131573314-T-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARG1	NM_000045.4 link	c.32T>C	p.Ile11Thr	missense_variant	Exon 1 of 8	ENST00000368087.8	NP_000036.2	P05089-1
ARG1	NM_001244438.2 link	c.32T>C	p.Ile11Thr	missense_variant	Exon 1 of 8		NP_001231367.1	P05089-2
ARG1	NM_001369020.1 link	c.32T>C	p.Ile11Thr	missense_variant	Exon 1 of 6		NP_001355949.1
ARG1	NR_160934.1 link	n.89T>C		non_coding_transcript_exon_variant	Exon 1 of 7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARG1	ENST00000368087.8 link	c.32T>C	p.Ile11Thr	missense_variant	Exon 1 of 8	1	NM_000045.4	ENSP00000357066.3		P05089-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250904

Hom.:

AF XY:

0.00000738

AC XY:

AN XY:

135580

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS 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:

0.00000274

AC:

AN:

1461830

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727222

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

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:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74302

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Arginase deficiency

Pathogenic:5

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 11 of the ARG1 protein (p.Ile11Thr). This variant is present in population databases (rs28941474, gnomAD 0.003%). This missense change has been observed in individual(s) with argininemia (PMID: 7649538, 21310339, 22959135, 26310552, 29443755). ClinVar contains an entry for this variant (Variation ID: 2393). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt ARG1 protein function with a negative predictive value of 80%. For these reasons, this variant has been classified as Pathogenic. -

Dec 27, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: ARG1 c.32T>C (p.Ile11Thr) results in a non-conservative amino acid change located in the Arginase/deacetylase domain (IPR023696) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 250904 control chromosomes. c.32T>C has been reported in the literature in multiple compound heterozygous or homozygous individuals affected with Arginase Deficiency (e.g. Cai_2018, Carvalho_2012, Uchino_1995). These data indicate that the variant is very likely to be associated with disease. At least one publication reports experimental evidence evaluating an impact on protein function. The most pronounced variant effect results in 10%-<30% of normal enzyme activity in vitro (e.g. Uchino_1995). The following publications have been ascertained in the context of this evaluation (PMID: 29443755, 22959135, 7649538). ClinVar contains an entry for this variant (Variation ID: 2393). Based on the evidence outlined above, the variant was classified as pathogenic. -

Sep 01, 1995

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Lifecell International Pvt. Ltd

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A Homozygote Missense variant c.32T>C in Exon 1 of the ARG1 gene that results in the amino acid substitution p.Ile11Thr was identified. The observed variant is novel in gnomAD exomes and genomes. The severity of the impact of this variant on the protein is medium, based on the effect of the protein and REVEL score. Rare Exome Variant Ensemble Learner (REVEL) is an ensembl method for predicting the pathogenicity of missense variants based on a combination of scores from 13 individual tools: MutPred, FATHMM v2.3, VEST 3.0, PolyPhen-2, SIFT, PROVEAN, MutationAssessor, MutationTaster, LRT, GERP++, SiPhy, phyloP, and phastCons. The REVEL score for an individual missense variant can range from 0 to 1, with higher scores reflecting greater likelihood that the variant is disease-causing. ClinVar has also classified this variant as Pathogenic [Variation ID: 2393]. The observed variation has been previously reported in patients affected with hyperargininemia (Carvalho, Daniel Rocha et al., 2012). For these reasons, this variant has been classified as Likely Pathogenic. -

Mar 03, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.43

BayesDel_addAF

Pathogenic

0.36

BayesDel_noAF

Pathogenic

0.36

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.89

D;.;.

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.49

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.93

D;D;D

M_CAP

Uncertain

0.21

MetaRNN

Pathogenic

0.98

D;D;D

MetaSVM

Uncertain

0.76

MutationAssessor

Pathogenic

3.3

M;M;M

PrimateAI

Uncertain

0.65

PROVEAN

Uncertain

-3.6

D;D;.

REVEL

Pathogenic

0.81

Sift

Uncertain

0.0010

D;D;.

Sift4G

Uncertain

0.0030

D;D;.

Polyphen

0.99

D;D;.

Vest4

0.77

MutPred

0.93

Gain of glycosylation at I11 (P = 0.0218);Gain of glycosylation at I11 (P = 0.0218);Gain of glycosylation at I11 (P = 0.0218);

MVP

0.98

MPC

0.42

ClinPred

0.94

GERP RS

6.0

Varity_R

0.83

gMVP

0.89

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