Genetic Variant NM_016048.2:c.17C>T (chr5-129094783-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_016048.2(ISOC1):c.17C>T(p.Pro6Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000159 in 1,508,968 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 (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

ISOC1
NM_016048.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.867

Variant links:

Genes affected

ISOC1 (HGNC:24254): (isochorismatase domain containing 1) Predicted to be located in peroxisome. Predicted to be active in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ISOC1 links:

LOC124901060 (HGNC:):

LOC124901060 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.09489989).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ISOC1	NM_016048.2 link	c.17C>T	p.Pro6Leu	missense_variant	Exon 1 of 5	ENST00000173527.6	NP_057132.2	Q96CN7
LOC124901060	XR_007058926.1 link	n.848G>A		non_coding_transcript_exon_variant	Exon 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ISOC1	ENST00000173527.6 link	c.17C>T	p.Pro6Leu	missense_variant	Exon 1 of 5	1	NM_016048.2	ENSP00000173527.5		Q96CN7
ISOC1	ENST00000514194.5 link	c.17C>T	p.Pro6Leu	missense_variant	Exon 1 of 3	3		ENSP00000421273.1		D6RGE2

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152008

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00

AC:

AN:

113706

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000140

AC:

AN:

1356960

Hom.:

Cov.:

AF XY:

0.0000150

AC XY:

AN XY:

668720

show subpopulations

African (AFR)

AF:

0.000105

AC:

AN:

28590

American (AMR)

AF:

0.0000306

AC:

AN:

32668

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24264

East Asian (EAS)

AF:

0.00

AC:

AN:

32222

South Asian (SAS)

AF:

0.0000394

AC:

AN:

76216

European-Finnish (FIN)

AF:

0.00

AC:

AN:

35944

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4064

European-Non Finnish (NFE)

AF:

0.0000103

AC:

AN:

1066410

Other (OTH)

AF:

0.0000177

AC:

AN:

56582

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152008

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74270

show subpopulations

African (AFR)

AF:

0.0000965

AC:

AN:

41438

American (AMR)

AF:

0.00

AC:

AN:

15266

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5164

South Asian (SAS)

AF:

0.000207

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10568

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67956

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.515

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000136

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 12, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.17C>T (p.P6L) alteration is located in exon 1 (coding exon 1) of the ISOC1 gene. This alteration results from a C to T substitution at nucleotide position 17, causing the proline (P) at amino acid position 6 to be replaced by a leucine (L). 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

0.12

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.49

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0053

T;T

Eigen

Benign

-0.76

Eigen_PC

Benign

-0.78

FATHMM_MKL

Benign

0.22

LIST_S2

Benign

0.59

T;T

M_CAP

Pathogenic

0.51

MetaRNN

Benign

0.095

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

.;N

PhyloP100

0.87

PrimateAI

Pathogenic

0.81

PROVEAN

Benign

-0.060

N;N

REVEL

Benign

0.019

Sift

Benign

0.15

T;T

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.45

.;B

Vest4

0.18

MutPred

0.31

Gain of helix (P = 0.0022);Gain of helix (P = 0.0022);

MVP

0.39

MPC

0.74

ClinPred

0.26

GERP RS

1.6

PromoterAI

0.048

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.0

Varity_R

0.034

gMVP

0.34

Mutation Taster

=98/2

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

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NM_016048.2:c.17C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over