Genetic Variant D2HGDH:p.Gly423Arg (chr2-241755975-G-C) – ACMG Classification: Uncertain_significance (5 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1PM2PP3

The NM_152783.5(D2HGDH):c.1267G>C(p.Gly423Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000000688 in 1,452,446 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G423S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

D2HGDH
NM_152783.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.94

Publications

0 publications found

Variant links:

Genes affected

D2HGDH (HGNC:28358): (D-2-hydroxyglutarate dehydrogenase) This gene encodes D-2hydroxyglutarate dehydrogenase, a mitochondrial enzyme belonging to the FAD-binding oxidoreductase/transferase type 4 family. This enzyme, which is most active in liver and kidney but also active in heart and brain, converts D-2-hydroxyglutarate to 2-ketoglutarate. Mutations in this gene are present in D-2-hydroxyglutaric aciduria, a rare recessive neurometabolic disorder causing developmental delay, epilepsy, hypotonia, and dysmorphic features. [provided by RefSeq, Jul 2008]

D2HGDH Gene-Disease associations (from GenCC):

D-2-hydroxyglutaric aciduria 1
Inheritance: AR Classification: STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)
D-2-hydroxyglutaric aciduria
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

D2HGDH links:

ENSG00000234793 (HGNC:):

ENSG00000234793 links:

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ACMG classification

Classification was made for transcript

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

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 7 uncertain in NM_152783.5

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.793

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_152783.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
D2HGDH	NM_152783.5	MANE Select	c.1267G>C	p.Gly423Arg	missense	Exon 9 of 10	NP_689996.4
D2HGDH	NM_001287249.2		c.865G>C	p.Gly289Arg	missense	Exon 8 of 9	NP_001274178.1
D2HGDH	NM_001352824.2		c.706G>C	p.Gly236Arg	missense	Exon 9 of 10	NP_001339753.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
D2HGDH	ENST00000321264.9	TSL:1 MANE Select	c.1267G>C	p.Gly423Arg	missense	Exon 9 of 10	ENSP00000315351.4
D2HGDH	ENST00000436747.5	TSL:1	n.*2503G>C		non_coding_transcript_exon	Exon 11 of 12	ENSP00000400212.1
D2HGDH	ENST00000468064.5	TSL:1	n.1157G>C		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.88e-7

AC:

AN:

1452446

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

720668

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33260

American (AMR)

AF:

0.00

AC:

AN:

44494

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26034

East Asian (EAS)

AF:

0.00

AC:

AN:

39382

South Asian (SAS)

AF:

0.00

AC:

AN:

86078

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52232

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5746

European-Non Finnish (NFE)

AF:

9.05e-7

AC:

AN:

1105350

Other (OTH)

AF:

0.00

AC:

AN:

59870

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.31

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Uncertain

0.080

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.41

Eigen

Benign

0.13

Eigen_PC

Benign

0.14

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.85

M_CAP

Benign

0.025

MetaRNN

Pathogenic

0.79

MetaSVM

Benign

-0.66

MutationAssessor

Benign

1.3

PhyloP100

6.9

PrimateAI

Uncertain

0.63

PROVEAN

Pathogenic

-4.7

REVEL

Uncertain

0.52

Sift

Benign

0.043

Sift4G

Benign

0.13

Polyphen

0.24

Vest4

0.67

MutPred

0.42

Gain of methylation at G423 (P = 0.0194)

MVP

0.89

MPC

0.65

ClinPred

0.77

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.41

gMVP

0.90

Mutation Taster

=14/86

disease causing

(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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over