rs782697291

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001111125.3(IQSEC2):c.3364C>T(p.Arg1122Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000253 in 1,203,945 control chromosomes in the GnomAD database, including 2 homozygotes. There are 173 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1122H) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., 5 hem., cov: 24)

Exomes 𝑓: 0.00027 ( 2 hom. 168 hem. )

Consequence

IQSEC2
NM_001111125.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1B:4

Conservation

PhyloP100: 2.15

Variant links:

Genes affected

IQSEC2 (HGNC:29059): (IQ motif and Sec7 domain ArfGEF 2) This gene encodes a guanine nucleotide exchange factor for the ARF family of small GTP-binding proteins. The encoded protein is a component of the postsynaptic density at excitatory synapses, and may play a critical role in cytoskeletal and synaptic organization through the activation of selected ARF substrates including ARF1 and ARF6. Mutations in this gene have been implicated in nonsyndromic X-linked cognitive disability. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Aug 2011]

IQSEC2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010379791).

BS2

High Hemizygotes in GnomAd at 5 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IQSEC2	NM_001111125.3 linkuse as main transcript	c.3364C>T	p.Arg1122Cys	missense_variant	13/15	ENST00000642864.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IQSEC2	ENST00000642864.1 linkuse as main transcript	c.3364C>T	p.Arg1122Cys	missense_variant	13/15		NM_001111125.3	P1	Q5JU85-2

Frequencies

GnomAD3 genomes

AF:

0.000106

AC:

AN:

112863

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

AN XY:

35019

show subpopulations

Gnomad AFR

AF:

0.0000643

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00288

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000376

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000403

AC:

AN:

166346

Hom.:

AF XY:

0.000739

AC XY:

AN XY:

54160

show subpopulations

Gnomad AFR exome

AF:

0.0000844

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00373

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000413

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000269

AC:

293

AN:

1091031

Hom.:

Cov.:

AF XY:

0.000470

AC XY:

168

AN XY:

357533

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000289

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00364

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000104

Gnomad4 OTH exome

AF:

0.000262

GnomAD4 genome

AF:

0.000106

AC:

AN:

112914

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

AN XY:

35080

show subpopulations

Gnomad4 AFR

AF:

0.0000641

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00289

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000376

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.000471

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Abnormal brain morphology

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

research

Lupski Lab, Baylor-Hopkins CMG, Baylor College of Medicine

- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

Athena Diagnostics

Nov 21, 2019

- -

Intellectual disability, X-linked 1

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 26, 2024

- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 31, 2017

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Jan 01, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.47

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Uncertain

-0.060

Cadd

Pathogenic

Dann

Pathogenic

1.0

FATHMM_MKL

Uncertain

0.87

LIST_S2

Pathogenic

0.98

D;D;D;.;D;D

M_CAP

Uncertain

0.20

MetaRNN

Benign

0.010

T;T;T;T;T;T

MetaSVM

Benign

-0.42

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Pathogenic

0.81

Polyphen

1.0

.;.;.;.;.;D

Vest4

0.20, 0.55

MutPred

0.26

.;.;Gain of catalytic residue at M1120 (P = 0.0011);Gain of catalytic residue at M1120 (P = 0.0011);Gain of catalytic residue at M1120 (P = 0.0011);.;

MVP

0.71

MPC

2.6

ClinPred

0.82

GERP RS

5.1

Varity_R

0.35

gMVP

0.78

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