Genetic Variant IQSEC2:p.Pro268His (chrX-53255996-G-T) – ACMG Classification: Benign (-7 pts)

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4BP6_ModerateBS2

The NM_001111125.3(IQSEC2):c.803C>A(p.Pro268His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000421 in 1,188,757 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000018 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.0000028 ( 0 hom. 3 hem. )

Consequence

IQSEC2
NM_001111125.3 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 2.68

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:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.3467216).

BP6

Variant X-53255996-G-T is Benign according to our data. Variant chrX-53255996-G-T is described in ClinVar as [Likely_benign]. Clinvar id is 538600.Status of the report is criteria_provided_single_submitter, 1 stars.

BS2

High Hemizygotes in GnomAdExome4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IQSEC2	NM_001111125.3 link	c.803C>A	p.Pro268His	missense_variant	Exon 3 of 15	ENST00000642864.1	NP_001104595.1	Q5JU85-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IQSEC2	ENST00000642864.1 link	c.803C>A	p.Pro268His	missense_variant	Exon 3 of 15		NM_001111125.3	ENSP00000495726.1		Q5JU85-2

Frequencies

GnomAD3 genomes

AF:

0.0000178

AC:

AN:

112618

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34776

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:

0.0000376

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000279

AC:

AN:

1076139

Hom.:

Cov.:

AF XY:

0.00000865

AC XY:

AN XY:

346811

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000362

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000178

AC:

AN:

112618

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34776

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000376

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000150

AC:

ExAC

AF:

0.0000167

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Intellectual disability, X-linked 1

Benign:1

Jun 28, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Uncertain

0.067

BayesDel_noAF

Benign

-0.13

CADD

Uncertain

DANN

Uncertain

0.99

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.83

T;.;T;T;T

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.35

T;T;T;T;T

MetaSVM

Uncertain

-0.25

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-2.8

.;D;.;D;.

REVEL

Uncertain

0.35

Sift

Uncertain

0.0010

.;D;.;T;.

Sift4G

Benign

0.58

.;T;.;T;.

Polyphen

1.0

.;.;.;D;.

Vest4

0.26, 0.37

MVP

0.71

MPC

1.6

ClinPred

0.63

GERP RS

5.1

Varity_R

0.53

gMVP

0.40

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