chrX-53255834-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4BP6BS2

The NM_001111125.3(IQSEC2):c.965G>A(p.Ser322Asn) variant causes a missense change. The variant allele was found at a frequency of 0.0000116 in 1,210,445 control chromosomes in the GnomAD database, including 1 homozygotes. There are 5 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).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.000012 ( 1 hom. 5 hem. )

Consequence

IQSEC2
NM_001111125.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 6.04

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: XL Classification: DEFINITIVE Submitted by: Ambry Genetics
intellectual disability, X-linked 1
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
X-linked complex neurodevelopmental disorder
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
non-syndromic X-linked intellectual disability
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
severe intellectual disability-progressive postnatal microcephaly- midline stereotypic hand movements syndrome
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

IQSEC2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.29205424).

BP6

Variant X-53255834-C-T is Benign according to our data. Variant chrX-53255834-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 435522.

BS2

High Hemizygotes in GnomAdExome4 at 5 XL gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001111125.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
IQSEC2	NM_001111125.3	MANE Select	c.965G>A	p.Ser322Asn	missense	Exon 3 of 15	NP_001104595.1
IQSEC2	NM_001441092.1		c.965G>A	p.Ser322Asn	missense	Exon 3 of 14	NP_001428021.1
IQSEC2	NM_001410736.1		c.965G>A	p.Ser322Asn	missense	Exon 3 of 14	NP_001397665.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
IQSEC2	ENST00000642864.1	MANE Select	c.965G>A	p.Ser322Asn	missense	Exon 3 of 15	ENSP00000495726.1
IQSEC2	ENST00000375365.2	TSL:1	c.350G>A	p.Ser117Asn	missense	Exon 3 of 14	ENSP00000364514.2
IQSEC2	ENST00000638630.1	TSL:1	c.254G>A	p.Ser85Asn	missense	Exon 2 of 4	ENSP00000492390.1

Frequencies

GnomAD3 genomes

AF:

0.00000890

AC:

AN:

112421

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:

0.000370

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000276

AC:

AN:

181377

AF XY:

0.0000448

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000118

AC:

AN:

1098024

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

363410

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26401

American (AMR)

AF:

0.00

AC:

AN:

35203

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19384

East Asian (EAS)

AF:

0.00

AC:

AN:

30206

South Asian (SAS)

AF:

0.000222

AC:

AN:

54138

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4137

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

842046

Other (OTH)

AF:

0.0000217

AC:

AN:

46093

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000890

AC:

AN:

112421

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34547

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30918

American (AMR)

AF:

0.00

AC:

AN:

10689

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2657

East Asian (EAS)

AF:

0.00

AC:

AN:

3583

South Asian (SAS)

AF:

0.000370

AC:

AN:

2704

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6234

Middle Eastern (MID)

AF:

0.00

AC:

AN:

238

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

53193

Other (OTH)

AF:

0.00

AC:

AN:

1522

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.725

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.0000165

AC:

ClinVar

ClinVar submissions as Germline

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Intellectual disability, X-linked 1 (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.42

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.32

CADD

Benign

(source)

DANN

Uncertain

0.99

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.94

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.29

MetaSVM

Uncertain

0.15

PhyloP100

6.0

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-1.8

REVEL

Uncertain

0.36

Sift

Uncertain

0.0020

Sift4G

Uncertain

0.024

Polyphen

1.0

Vest4

0.070

MutPred

0.11

Loss of phosphorylation at S322 (P = 0.0213)

MVP

0.82

MPC

1.9

ClinPred

0.40

GERP RS

4.6

Varity_R

0.52

gMVP

0.74

Mutation Taster

=96/4

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over