chr12-108562636-G-C

Position:

chr12-108562636-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_213595.4(ISCU):c.14G>C(p.Gly5Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000176 in 1,479,540 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. G5G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 35)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

ISCU
NM_213595.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.43

Variant links:

Genes affected

ISCU (HGNC:29882): (iron-sulfur cluster assembly enzyme) This gene encodes a component of the iron-sulfur (Fe-S) cluster scaffold. Fe-S clusters are cofactors that play a role in the function of a diverse set of enzymes, including those that regulate metabolism, iron homeostasis, and oxidative stress response. Alternative splicing results in transcript variants encoding different protein isoforms that localize either to the cytosol or to the mitochondrion. Mutations in this gene have been found in patients with hereditary myopathy with lactic acidosis. A disease-associated mutation in an intron may activate a cryptic splice site, resulting in the production of a splice variant encoding a putatively non-functional protein. A pseudogene of this gene is present on chromosome 1. [provided by RefSeq, Feb 2016]

ISCU links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.21573934).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ISCU	NM_213595.4 linkuse as main transcript	c.14G>C	p.Gly5Ala	missense_variant	1/5	ENST00000311893.14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ISCU	ENST00000311893.14 linkuse as main transcript	c.14G>C	p.Gly5Ala	missense_variant	1/5	1	NM_213595.4	P1	Q9H1K1-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152252

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000723

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000992

AC:

AN:

100780

Hom.:

AF XY:

0.00

AC XY:

AN XY:

58272

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000225

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000166

AC:

AN:

1327288

Hom.:

Cov.:

AF XY:

0.0000168

AC XY:

AN XY:

654266

show subpopulations

Gnomad4 AFR exome

AF:

0.0000735

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:

0.0000180

Gnomad4 OTH exome

AF:

0.0000181

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152252

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74382

show subpopulations

Gnomad4 AFR

AF:

0.0000723

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ExAC

AF:

0.0000288

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Aug 14, 2022

This sequence change replaces glycine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 5 of the ISCU protein (p.Gly5Ala). This variant is present in population databases (rs587780954, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with ISCU-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.067

BayesDel_addAF

Uncertain

0.054

BayesDel_noAF

Benign

-0.12

CADD

Benign

DANN

Uncertain

0.98

Eigen

Benign

-0.30

Eigen_PC

Benign

-0.13

FATHMM_MKL

Benign

0.29

M_CAP

Benign

0.082

MetaRNN

Benign

0.22

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationTaster

Benign

1.0

D;D;N;N;N;N;N

PrimateAI

Pathogenic

0.83

PROVEAN

Benign

-0.26

N;N;N;N;N

REVEL

Benign

0.20

Sift

Uncertain

0.012

D;D;D;D;D

Sift4G

Benign

0.18

T;T;T;T;T

Polyphen

0.15

B;B;B;B;B

Vest4

0.43

MutPred

0.41

Loss of catalytic residue at G5 (P = 0.011);Loss of catalytic residue at G5 (P = 0.011);Loss of catalytic residue at G5 (P = 0.011);Loss of catalytic residue at G5 (P = 0.011);Loss of catalytic residue at G5 (P = 0.011);

MVP

0.61

MPC

0.37

ClinPred

0.25

GERP RS

4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.10

gMVP

0.57

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