Genetic Variant L2HGDH:p.Tyr195Cys (chr14-50283990-T-C) – ACMG Classification: Likely_pathogenic (8 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2PP3_StrongPP5_Moderate

The NM_024884.3(L2HGDH):c.584A>G(p.Tyr195Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000889 in 1,461,838 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: not found (cov: 32)

Exomes 𝑓: 0.0000089 ( 0 hom. )

Consequence

L2HGDH
NM_024884.3 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 4.31

Publications

2 publications found

Variant links:

Genes affected

L2HGDH (HGNC:20499): (L-2-hydroxyglutarate dehydrogenase) This gene encodes L-2-hydroxyglutarate dehydrogenase, a FAD-dependent enzyme that oxidizes L-2-hydroxyglutarate to alpha-ketoglutarate in a variety of mammalian tissues. Mutations in this gene cause L-2-hydroxyglutaric aciduria, a rare autosomal recessive neurometabolic disorder resulting in moderate to severe cognitive disability. [provided by RefSeq, Jul 2008]

L2HGDH Gene-Disease associations (from GenCC):

L-2-hydroxyglutaric aciduria
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), Orphanet
mitochondrial disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen

L2HGDH links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.952

PP5

Variant 14-50283990-T-C is Pathogenic according to our data. Variant chr14-50283990-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 435700.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
L2HGDH	NM_024884.3 link	c.584A>G	p.Tyr195Cys	missense_variant	Exon 5 of 10	ENST00000267436.9	NP_079160.1	Q9H9P8-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
L2HGDH	ENST00000267436.9 link	c.584A>G	p.Tyr195Cys	missense_variant	Exon 5 of 10	1	NM_024884.3	ENSP00000267436.4		Q9H9P8-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000889

AC:

AN:

1461838

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727216

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000117

AC:

AN:

1111976

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.444

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

Cov.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

L-2-hydroxyglutaric aciduria

Pathogenic:1

Jan 28, 2016

Genetic Services Laboratory, University of Chicago

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

0.71

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.36

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.41

T;T;T;.

Eigen

Pathogenic

0.83

Eigen_PC

Pathogenic

0.76

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.96

D;.;D;D

M_CAP

Uncertain

0.26

MetaRNN

Pathogenic

0.95

D;D;D;D

MetaSVM

Uncertain

0.74

MutationAssessor

Pathogenic

3.5

.;H;H;.

PhyloP100

4.3

PrimateAI

Uncertain

0.62

PROVEAN

Pathogenic

-6.0

D;D;D;D

REVEL

Pathogenic

0.90

Sift

Uncertain

0.0010

D;D;D;D

Sift4G

Pathogenic

0.0010

D;D;D;D

Polyphen

1.0

D;D;D;.

Vest4

0.82

MutPred

0.80

Gain of catalytic residue at T190 (P = 0);Gain of catalytic residue at T190 (P = 0);Gain of catalytic residue at T190 (P = 0);Gain of catalytic residue at T190 (P = 0);

MVP

0.92

MPC

0.89

ClinPred

1.0

GERP RS

5.6

Varity_R

0.91

gMVP

0.89

Mutation Taster

=5/95

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over