10-1019592-C-A

Position:

chr10-1019592-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_033261.3(IDI2):c.609G>T(p.Arg203Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000384 in 1,614,082 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

IDI2
NM_033261.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.84

Variant links:

Genes affected

IDI2 (HGNC:23487): (isopentenyl-diphosphate delta isomerase 2) The protein encoded by this gene catalyzes the conversion of isopentenyl diphosphate to dimethylallyl diphosphate, which is a precursor for the synthesis of cholesterol and other isoprenoids. This gene, which is a product of an ancestral gene duplication event, encodes a protein that may be involved in the aggregation of alpha-synuclein in the cerebral cortex of patients with Lewy body disease. In addition, segmental copy number gains in this locus have been associated with sporadic amyotrophic lateral sclerosis. [provided by RefSeq, Jul 2016]

IDI2 links:

GTPBP4 (HGNC:21535): (GTP binding protein 4) GTP-binding proteins are GTPases and function as molecular switches that can flip between two states: active, when GTP is bound, and inactive, when GDP is bound. 'Active' in this context usually means that the molecule acts as a signal to trigger other events in the cell. When an extracellular ligand binds to a G-protein-linked receptor, the receptor changes its conformation and switches on the trimeric G proteins that associate with it by causing them to eject their GDP and replace it with GTP. The switch is turned off when the G protein hydrolyzes its own bound GTP, converting it back to GDP. But before that occurs, the active protein has an opportunity to diffuse away from the receptor and deliver its message for a prolonged period to its downstream target. [provided by RefSeq, Jul 2008]

GTPBP4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.011325419).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
IDI2	NM_033261.3 linkuse as main transcript	c.609G>T	p.Arg203Ser	missense_variant	5/5	ENST00000277517.2
GTPBP4	NM_012341.3 linkuse as main transcript	c.*2365C>A		3_prime_UTR_variant	17/17	ENST00000360803.9
GTPBP4	XM_047424932.1 linkuse as main transcript	c.*2365C>A		3_prime_UTR_variant	17/17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IDI2	ENST00000277517.2 linkuse as main transcript	c.609G>T	p.Arg203Ser	missense_variant	5/5	1	NM_033261.3	P1
GTPBP4	ENST00000360803.9 linkuse as main transcript	c.*2365C>A		3_prime_UTR_variant	17/17	1	NM_012341.3	P1	Q9BZE4-1

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152088

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000579

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000796

AC:

AN:

251372

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135858

show subpopulations

Gnomad AFR exome

AF:

0.000923

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000253

AC:

AN:

1461876

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.000687

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000629

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.000164

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74398

show subpopulations

Gnomad4 AFR

AF:

0.000602

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000129

Hom.:

Bravo

AF:

0.000170

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 12, 2022

The c.609G>T (p.R203S) alteration is located in exon 5 (coding exon 4) of the IDI2 gene. This alteration results from a G to T substitution at nucleotide position 609, causing the arginine (R) at amino acid position 203 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.55

BayesDel_noAF

Benign

-0.63

CADD

Benign

0.16

DANN

Benign

0.85

DEOGEN2

Benign

0.16

Eigen

Benign

-1.8

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.030

LIST_S2

Benign

0.45

M_CAP

Benign

0.0012

MetaRNN

Benign

0.011

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.095

MutationTaster

Benign

0.99

D;N

PrimateAI

Benign

0.32

PROVEAN

Benign

0.86

REVEL

Benign

0.025

Sift

Benign

0.67

Sift4G

Benign

0.71

Polyphen

0.0

Vest4

0.047

MutPred

0.50

Loss of MoRF binding (P = 0.0158);

MVP

0.18

MPC

0.022

ClinPred

0.0035

GERP RS

-6.7

Varity_R

0.31

gMVP

0.50

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

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