12-108562627-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_213595.4(ISCU):c.5C>T(p.Ala2Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000259 in 1,466,448 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

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

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

ISCU
NM_213595.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.99

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

mitochondrial disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hereditary myopathy with lactic acidosis due to ISCU deficiency
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

ISCU links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ISCU	NM_213595.4 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 5	ENST00000311893.14	NP_998760.1	Q9H1K1-1B3KQ30

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ISCU	ENST00000311893.14 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 5	1	NM_213595.4	ENSP00000310623.9		Q9H1K1-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152254

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000218

AC:

AN:

91774

AF XY:

0.0000188

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000628

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000252

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000259

AC:

AN:

1314194

Hom.:

Cov.:

AF XY:

0.0000278

AC XY:

AN XY:

647198

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26892

American (AMR)

AF:

0.0000366

AC:

AN:

27320

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22462

East Asian (EAS)

AF:

0.00

AC:

AN:

30240

South Asian (SAS)

AF:

0.0000143

AC:

AN:

69756

European-Finnish (FIN)

AF:

0.00

AC:

AN:

32196

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4428

European-Non Finnish (NFE)

AF:

0.0000277

AC:

AN:

1046332

Other (OTH)

AF:

0.0000550

AC:

AN:

54568

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.529

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74386

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41472

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4838

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68046

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000194

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Jul 12, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 2 of the ISCU protein (p.Ala2Val). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with ISCU-related conditions. ClinVar contains an entry for this variant (Variation ID: 1367098). 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

Uncertain

0.43

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Uncertain

0.0

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.056

.;T;.;T;.

Eigen

Benign

0.098

Eigen_PC

Benign

0.13

FATHMM_MKL

Benign

0.28

LIST_S2

Benign

0.32

.;T;T;T;T

M_CAP

Uncertain

0.19

MetaRNN

Uncertain

0.51

D;D;D;D;D

MetaSVM

Benign

-0.62

MutationAssessor

Benign

0.0

.;.;.;N;.

PhyloP100

3.0

PrimateAI

Pathogenic

0.88

PROVEAN

Benign

-0.42

N;N;N;N;N

REVEL

Benign

0.19

Sift

Pathogenic

0.0

D;D;D;D;D

Sift4G

Uncertain

0.029

D;D;D;T;D

Polyphen

1.0

D;D;D;D;D

Vest4

0.53

MutPred

0.25

Gain of loop (P = 0.2754);Gain of loop (P = 0.2754);Gain of loop (P = 0.2754);Gain of loop (P = 0.2754);Gain of loop (P = 0.2754);

MVP

0.75

MPC

0.35

ClinPred

0.42

GERP RS

4.2

PromoterAI

-0.39

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.0

Varity_R

0.23

gMVP

0.74

Mutation Taster

=87/13

polymorphism

(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.

12-108562627-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over