rs121965040

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong

The NM_000274.4(OAT):c.539G>C(p.Arg180Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000044 in 1,613,892 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 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000042 ( 0 hom. )

Consequence

OAT
NM_000274.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 7.47

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 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.906

PP5

Variant 10-124405545-C-G is Pathogenic according to our data. Variant chr10-124405545-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 153.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr10-124405545-C-G is described in Lovd as [Pathogenic]. Variant chr10-124405545-C-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OAT	NM_000274.4 link	c.539G>C	p.Arg180Thr	missense_variant	Exon 5 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.539G>C	p.Arg180Thr	missense_variant	Exon 5 of 10	1	NM_000274.4	ENSP00000357838.5	P04181-1
OAT	ENST00000539214.5 link	c.125G>C	p.Arg42Thr	missense_variant	Exon 4 of 9	1		ENSP00000439042.1	P04181-2
OAT	ENST00000467675.5 link	n.340G>C		non_coding_transcript_exon_variant	Exon 4 of 7	5
OAT	ENST00000483711.1 link	n.385G>C		non_coding_transcript_exon_variant	Exon 1 of 2	5

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152162

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.000660

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000716

AC:

AN:

251340

Hom.:

AF XY:

0.0000810

AC XY:

AN XY:

135856

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000785

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000417

AC:

AN:

1461730

Hom.:

Cov.:

AF XY:

0.0000454

AC XY:

AN XY:

727160

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000580

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152162

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74326

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000660

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Ornithine aminotransferase deficiency

Pathogenic:3

Sep 04, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. Experimental studies have shown that this missense change affects OAT function (PMID: 1737786, 2492100, 30957963). 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. ClinVar contains an entry for this variant (Variation ID: 153). This missense change has been observed in individual(s) with gyrate atrophy (PMID: 2492100, 11297489). This variant is present in population databases (rs121965040, gnomAD 0.07%). This sequence change replaces arginine, which is basic and polar, with threonine, which is neutral and polar, at codon 180 of the OAT protein (p.Arg180Thr). -

Feb 01, 2018

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Feb 12, 2023

Baylor Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.45

BayesDel_noAF

Pathogenic

0.41

CADD

Pathogenic

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.94

.;D

Eigen

Pathogenic

0.79

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Pathogenic

1.0

D;D

M_CAP

Pathogenic

0.37

MetaRNN

Pathogenic

0.91

D;D

MetaSVM

Pathogenic

0.89

MutationAssessor

Uncertain

2.9

.;M

PrimateAI

Uncertain

0.68

PROVEAN

Pathogenic

-5.9

D;D

REVEL

Pathogenic

0.85

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.99

.;D

Vest4

0.96

MVP

0.98

MPC

0.93

ClinPred

0.78

GERP RS

4.6

RBP_binding_hub_radar

1.0

RBP_regulation_power_radar

2.8

Varity_R

0.99

gMVP

0.99

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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