Genetic Variant OPLAH:p.Arg768His (chr8-144055135-C-T) – ACMG Classification: Uncertain_significance (5 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2PP3PP5_Moderate

The NM_017570.5(OPLAH):c.2303G>A(p.Arg768His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000252 in 1,584,982 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R768C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

OPLAH
NM_017570.5 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:2

Conservation

PhyloP100: 2.11

Publications

4 publications found

Variant links:

Genes affected

OPLAH (HGNC:8149): (5-oxoprolinase, ATP-hydrolysing) The protein encoded by this gene acts as a homodimer, using ATP hydrolysis to catalyze the conversion of 5-oxo-L-proline to L-glutamate. Defects in this gene are a cause of 5-oxoprolinase deficiency (OPLAHD). [provided by RefSeq, Jun 2012]

OPLAH Gene-Disease associations (from GenCC):

5-oxoprolinase deficiency
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

OPLAH links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.809

PP5

Variant 8-144055135-C-T is Pathogenic according to our data. Variant chr8-144055135-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 191344.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OPLAH	NM_017570.5 link	c.2303G>A	p.Arg768His	missense_variant	Exon 17 of 27	ENST00000618853.5	NP_060040.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OPLAH	ENST00000618853.5 link	c.2303G>A	p.Arg768His	missense_variant	Exon 17 of 27	1	NM_017570.5	ENSP00000480476.1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152072

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000385

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000180

AC:

AN:

222140

AF XY:

0.0000166

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000654

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000997

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000230

AC:

AN:

1432792

Hom.:

Cov.:

AF XY:

0.0000211

AC XY:

AN XY:

710746

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32526

American (AMR)

AF:

0.0000246

AC:

AN:

40670

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24272

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39486

South Asian (SAS)

AF:

0.0000732

AC:

AN:

81962

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51088

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5554

European-Non Finnish (NFE)

AF:

0.0000155

AC:

AN:

1098060

Other (OTH)

AF:

0.000135

AC:

AN:

59174

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74392

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41506

American (AMR)

AF:

0.0000654

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000386

AC:

AN:

5178

South Asian (SAS)

AF:

0.000207

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

67990

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000460

Hom.:

Bravo

AF:

0.0000491

ExAC

AF:

0.0000249

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

5-Oxoprolinase deficiency

Pathogenic:1

Mar 26, 2024

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Pathogenic:1

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance:Likely pathogenic

Review Status:flagged submission

Collection Method:research

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.97

BayesDel_addAF

Pathogenic

0.32

BayesDel_noAF

Pathogenic

0.22

CADD

Pathogenic

(source)

DANN

Benign

0.90

DEOGEN2

Uncertain

0.62

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.58

LIST_S2

Pathogenic

1.0

M_CAP

Uncertain

0.13

MetaRNN

Pathogenic

0.81

MetaSVM

Uncertain

0.099

PhyloP100

2.1

PrimateAI

Pathogenic

0.82

Sift4G

Pathogenic

0.0

Vest4

0.76

ClinPred

0.99

GERP RS

4.5

Varity_R

0.87

gMVP

0.86

Mutation Taster

=15/85

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over