Genetic Variant IQCE:p.Gln91Leu (chr7-2572204-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_152558.5(IQCE):c.272A>T(p.Gln91Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000211 in 1,613,712 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

IQCE
NM_152558.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.725

Publications

0 publications found

Variant links:

Genes affected

IQCE (HGNC:29171): (IQ motif containing E) Involved in limb morphogenesis. Predicted to be extrinsic component of membrane. Predicted to be part of plasma membrane protein complex. [provided by Alliance of Genome Resources, Apr 2022]

IQCE Gene-Disease associations (from GenCC):

postaxial polydactyly type A
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
polydactyly, postaxial, type a7
Inheritance: AR Classification: LIMITED Submitted by: Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae)

IQCE links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0574072).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IQCE	NM_152558.5 link	c.272A>T	p.Gln91Leu	missense_variant	Exon 5 of 22	ENST00000402050.7	NP_689771.3	Q6IPM2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IQCE	ENST00000402050.7 link	c.272A>T	p.Gln91Leu	missense_variant	Exon 5 of 22	1	NM_152558.5	ENSP00000385597.2		Q6IPM2-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000804

AC:

AN:

248862

AF XY:

0.0000148

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000212

AC:

AN:

1461486

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727064

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33444

American (AMR)

AF:

0.00

AC:

AN:

44616

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26112

East Asian (EAS)

AF:

0.00

AC:

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000270

AC:

AN:

1111840

Other (OTH)

AF:

0.0000166

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74372

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41460

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.00000827

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 27, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.272A>T (p.Q91L) alteration is located in exon 5 (coding exon 5) of the IQCE gene. This alteration results from a A to T substitution at nucleotide position 272, causing the glutamine (Q) at amino acid position 91 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

0.13

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.49

CADD

Benign

(source)

DANN

Benign

0.91

DEOGEN2

Benign

0.026

.;T;T;.;T;.;.;.;.;.

Eigen

Benign

-0.83

Eigen_PC

Benign

-0.89

FATHMM_MKL

Benign

0.35

LIST_S2

Benign

0.65

T;T;T;T;T;T;T;.;.;T

M_CAP

Benign

0.0097

MetaRNN

Benign

0.057

T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.9

.;L;.;.;.;.;.;.;.;.

PhyloP100

0.72

PrimateAI

Benign

0.33

PROVEAN

Benign

-2.3

.;N;N;N;.;N;.;N;N;N

REVEL

Benign

0.055

Sift

Benign

0.11

.;T;T;T;.;T;.;T;T;T

Sift4G

Benign

0.24

T;T;T;T;T;T;T;T;T;T

Polyphen

0.43

B;B;.;P;.;.;.;B;.;.

Vest4

0.34

MutPred

0.33

.;Gain of stability (P = 0.047);Gain of stability (P = 0.047);.;Gain of stability (P = 0.047);.;.;.;.;.;

MVP

0.27

MPC

0.25

ClinPred

0.067

GERP RS

-1.8

Varity_R

0.086

gMVP

0.14

Mutation Taster

=100/0

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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chr7-2572204-A-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over