chr15-78156114-G-A

Variant names:

• chr15-78156114-G-A
• rs11631100
• NM_005530.3:c.90+839G>A

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_005530.3(IDH3A):​c.90+839G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.403 in 152,010 control chromosomes in the GnomAD database, including 12,928 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.40 (12928 hom., cov: 32)
• Consequence: IDH3A NM_005530.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.241
• Publications: 2 publications found

Genes affected

IDH3A (HGNC:5384): (isocitrate dehydrogenase (NAD(+)) 3 catalytic subunit alpha) 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. NAD(+)-dependent isocitrate dehydrogenases catalyze the allosterically regulated rate-limiting step of the tricarboxylic acid cycle. Each isozyme is a heterotetramer that is composed of two alpha subunits, one beta subunit, and one gamma subunit. The protein encoded by this gene is the alpha subunit of one isozyme of NAD(+)-dependent isocitrate dehydrogenase. [provided by RefSeq, Jul 2008]

IDH3A Gene-Disease associations (from GenCC):

• retinitis pigmentosa

  Inheritance: AR Classification: STRONG Submitted by: G2P
• retinitis pigmentosa 90

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.467 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005530.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IDH3A	NM_005530.3	MANE Select	c.90+839G>A		intron	N/A	NP_005521.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IDH3A	ENST00000299518.7	TSL:1 MANE Select	c.90+839G>A		intron	N/A	ENSP00000299518.2
	IDH3A	ENST00000559889.5	TSL:1	n.117-794G>A		intron	N/A
	IDH3A	ENST00000558554.5	TSL:2	c.90+839G>A		intron	N/A	ENSP00000453084.1

Frequencies

GnomAD3 genomes AF: 0.403 AC: 61162 AN: 151892 Hom.: 12923 Cov.: 32

Gnomad AFR AF: 0.473

Gnomad AMI AF: 0.505

Gnomad AMR AF: 0.320

Gnomad ASJ AF: 0.423

Gnomad EAS AF: 0.0321

Gnomad SAS AF: 0.270

Gnomad FIN AF: 0.384

Gnomad MID AF: 0.443

Gnomad NFE AF: 0.417

Gnomad OTH AF: 0.391

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.403 AC: 61204 AN: 152010 Hom.: 12928 Cov.: 32 AF XY: 0.394 AC XY: 29247 AN XY: 74312

African (AFR) AF: 0.473 AC: 19571 AN: 41410

American (AMR) AF: 0.319 AC: 4871 AN: 15264

Ashkenazi Jewish (ASJ) AF: 0.423 AC: 1467 AN: 3470

East Asian (EAS) AF: 0.0324 AC: 168 AN: 5190

South Asian (SAS) AF: 0.271 AC: 1307 AN: 4818

European-Finnish (FIN) AF: 0.384 AC: 4058 AN: 10564

Middle Eastern (MID) AF: 0.449 AC: 132 AN: 294

European-Non Finnish (NFE) AF: 0.417 AC: 28351 AN: 67988

Other (OTH) AF: 0.390 AC: 818 AN: 2100

Alfa AF: 0.414 Hom.: 2200

Bravo AF: 0.402

Asia WGS AF: 0.177 AC: 616 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	2.6
DANN	Benign	0.69
PhyloP100		-0.24
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs11631100; hg19: chr15-78448456;