NM_002168.4:c.327G>A

Variant names:

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_ModerateBP6BP7BS1BS2

The NM_002168.4(IDH2):c.327G>A(p.Val109Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00375 in 1,614,162 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0039 ( 13 hom. )

Consequence

IDH2
NM_002168.4 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2

Conservation

PhyloP100: -0.153

Variant links:

Genes affected

IDH2 (HGNC:5383): (isocitrate dehydrogenase (NADP(+)) 2) Isocitrate dehydrogenases catalyze the oxidative decarboxylation of isocitrate to 2-oxoglutarate. These enzymes belong to two distinct subclasses, one of which utilizes NAD(+) as the electron acceptor and the other NADP(+). Five isocitrate dehydrogenases have been reported: three NAD(+)-dependent isocitrate dehydrogenases, which localize to the mitochondrial matrix, and two NADP(+)-dependent isocitrate dehydrogenases, one of which is mitochondrial and the other predominantly cytosolic. Each NADP(+)-dependent isozyme is a homodimer. The protein encoded by this gene is the NADP(+)-dependent isocitrate dehydrogenase found in the mitochondria. It plays a role in intermediary metabolism and energy production. This protein may tightly associate or interact with the pyruvate dehydrogenase complex. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2014]

IDH2 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.28).

BP6

Variant 15-90090525-C-T is Benign according to our data. Variant chr15-90090525-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 158665.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=1, Uncertain_significance=1}. Variant chr15-90090525-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-0.153 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00243 (370/152340) while in subpopulation NFE AF= 0.00398 (271/68020). AF 95% confidence interval is 0.00359. There are 0 homozygotes in gnomad4. There are 170 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 370 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IDH2	NM_002168.4 link	c.327G>A	p.Val109Val	synonymous_variant	Exon 3 of 11	ENST00000330062.8	NP_002159.2	P48735-1
IDH2	NM_001289910.1 link	c.171G>A	p.Val57Val	synonymous_variant	Exon 3 of 11		NP_001276839.1	P48735-2
IDH2	NM_001290114.2 link	c.-17-1778G>A		intron_variant	Intron 1 of 8		NP_001277043.1	P48735B4DSZ6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
IDH2	ENST00000330062.8 link	c.327G>A	p.Val109Val	synonymous_variant	Exon 3 of 11	1	NM_002168.4	ENSP00000331897.4	P48735-1
IDH2	ENST00000540499.2 link	c.171G>A	p.Val57Val	synonymous_variant	Exon 3 of 11	2		ENSP00000446147.2	P48735-2
IDH2	ENST00000559482.5 link	c.207+1028G>A		intron_variant	Intron 2 of 7	5		ENSP00000453016.1	H0YL11
IDH2	ENST00000560061.1 link	n.116-1778G>A		intron_variant	Intron 1 of 8	2		ENSP00000453254.1	H0YLL5

Frequencies

GnomAD3 genomes

AF:

0.00244

AC:

371

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00236

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00122

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00400

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.00247

AC:

621

AN:

251372

Hom.:

AF XY:

0.00243

AC XY:

330

AN XY:

135884

show subpopulations

Gnomad AFR exome

AF:

0.000677

Gnomad AMR exome

AF:

0.00234

Gnomad ASJ exome

AF:

0.000298

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000229

Gnomad FIN exome

AF:

0.00106

Gnomad NFE exome

AF:

0.00428

Gnomad OTH exome

AF:

0.00163

GnomAD4 exome

AF:

0.00388

AC:

5679

AN:

1461822

Hom.:

Cov.:

AF XY:

0.00362

AC XY:

2633

AN XY:

727202

show subpopulations

Gnomad4 AFR exome

AF:

0.000807

Gnomad4 AMR exome

AF:

0.00248

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000186

Gnomad4 FIN exome

AF:

0.00150

Gnomad4 NFE exome

AF:

0.00474

Gnomad4 OTH exome

AF:

0.00267

GnomAD4 genome

AF:

0.00243

AC:

370

AN:

152340

Hom.:

Cov.:

AF XY:

0.00228

AC XY:

170

AN XY:

74498

show subpopulations

Gnomad4 AFR

AF:

0.00106

Gnomad4 AMR

AF:

0.00235

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00122

Gnomad4 NFE

AF:

0.00398

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.00304

Hom.:

Bravo

AF:

0.00247

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00387

EpiControl

AF:

0.00314

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 16, 2014

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:1

Mar 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

IDH2: BP4, BP7, BS2 -

D-2-hydroxyglutaric aciduria 2

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.28

CADD

Benign

DANN

Benign

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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