rs121965044

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

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

The NM_000274.4(OAT):c.1250C>T(p.Pro417Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000062 in 1,613,872 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 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000064 ( 0 hom. )

Consequence

OAT
NM_000274.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 9.48

Variant links:

Genes affected

OAT (HGNC:8091): (ornithine aminotransferase) This gene encodes the mitochondrial enzyme ornithine aminotransferase, which is a key enzyme in the pathway that converts arginine and ornithine into the major excitatory and inhibitory neurotransmitters glutamate and GABA. Mutations that result in a deficiency of this enzyme cause the autosomal recessive eye disease Gyrate Atrophy. Alternatively spliced transcript variants encoding different isoforms have been described. Related pseudogenes have been defined on the X chromosome. [provided by RefSeq, Jan 2010]

OAT 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, 0.973

PP5

Variant 10-124398012-G-A is Pathogenic according to our data. Variant chr10-124398012-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 157.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr10-124398012-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OAT	NM_000274.4 link	c.1250C>T	p.Pro417Leu	missense_variant	Exon 10 of 10	ENST00000368845.6	NP_000265.1	P04181-1A0A140VJQ4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
OAT	ENST00000368845.6 link	c.1250C>T	p.Pro417Leu	missense_variant	Exon 10 of 10	1	NM_000274.4	ENSP00000357838.5	P04181-1
OAT	ENST00000539214.5 link	c.836C>T	p.Pro279Leu	missense_variant	Exon 9 of 9	1		ENSP00000439042.1	P04181-2
OAT	ENST00000471127.1 link	n.*9C>T		downstream_gene_variant		2

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

250978

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135724

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000636

AC:

AN:

1461736

Hom.:

Cov.:

AF XY:

0.0000633

AC XY:

AN XY:

727178

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000737

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152136

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Ornithine aminotransferase deficiency

Pathogenic:8

Aug 25, 2020

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Feb 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 417 of the OAT protein (p.Pro417Leu). This variant is present in population databases (rs121965044, gnomAD 0.005%). This missense change has been observed in individuals with gyrate atrophy (PMID: 1737786, 23076989). ClinVar contains an entry for this variant (Variation ID: 157). 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 OAT protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects OAT function (PMID: 1737786, 23076989). For these reasons, this variant has been classified as Pathogenic. -

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The OAT c.1250C>T (p.Pro417Leu) missense variant has been reported in three studies in which it is found in at least four individuals with ornithine aminotransferase deficiency including in three individuals in a compound heterozygous state, one of whom carried a third suspected benign variant in cis, as well as in one individual who was homozygous for the variant and carried the same presumed benign variant in cis (Brody et al. 1992; Sergouniotis et al. 2012; Doimo et al. 2013). Control data are unavailable for this variant, which is reported at a frequency of 0.00023 in the European American population of the Exome Sequencing Project but this is based on two alleles so the variant is presumed to be rare. The variant was expressed independently in Chinese hamster ovary (CHO) cells and yielded low levels of OAT antigen and absence of OAT activity (Brody et al. 1992). The p.Pro417Leu variant was also expressed in yeast and was found to have less than ten percent of OAT activity compared to wild type and failed to act as a functional complement to allow growth of a yeast strain containing a deletion variant of the CargB gene (Doimo et al. 2013). Based on the collective evidence, the p.Pro417Leu variant is classified as pathogenic for ornithine aminotransferase deficiency. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM)

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jul 22, 2021

Genome-Nilou Lab

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 03, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 13, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 15, 1992

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.89

BayesDel_addAF

Pathogenic

0.45

BayesDel_noAF

Pathogenic

0.58

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.98

.;D

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

0.85

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.99

D;D

M_CAP

Pathogenic

0.69

MetaRNN

Pathogenic

0.97

D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

5.0

.;H

PrimateAI

Uncertain

0.69

PROVEAN

Pathogenic

-9.7

D;D

REVEL

Pathogenic

0.89

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.96

MVP

0.98

MPC

0.85

ClinPred

1.0

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.99

gMVP

0.96

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