chrX-53234256-G-A
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Variant summary
Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4
The NM_001111125.3(IQSEC2):c.4430C>T(p.Pro1477Leu) variant causes a missense change involving the alteration of a conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Genomes: not found (cov: 16)
Exomes 𝑓: 0.0 ( 0 hom. 0 hem. )
Failed GnomAD Quality Control
Consequence
IQSEC2
NM_001111125.3 missense
NM_001111125.3 missense
Scores
3
3
9
Clinical Significance
Conservation
PhyloP100: 7.29
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]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -1 ACMG points.
BP4
Computational evidence support a benign effect (MetaRNN=0.27767754).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
IQSEC2 | NM_001111125.3 | c.4430C>T | p.Pro1477Leu | missense_variant | 15/15 | ENST00000642864.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
IQSEC2 | ENST00000642864.1 | c.4430C>T | p.Pro1477Leu | missense_variant | 15/15 | NM_001111125.3 | P1 |
Frequencies
GnomAD3 genomes Cov.: 16
GnomAD3 genomes
Cov.:
16
GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0AN: 983715Hom.: 0 Cov.: 22 AF XY: 0.00 AC XY: 0AN XY: 298133
GnomAD4 exome
Data not reliable, filtered out with message: AC0
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983715
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22
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0
AN XY:
298133
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GnomAD4 genome Cov.: 16
GnomAD4 genome
Cov.:
16
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Intellectual disability, X-linked 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 17, 2023 | This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 1477 of the IQSEC2 protein (p.Pro1477Leu). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with IQSEC2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1206978). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt IQSEC2 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | May 20, 2019 | Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Uncertain
DANN
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Benign
.;T
M_CAP
Uncertain
D
MetaRNN
Benign
T;T
MetaSVM
Benign
T
MutationTaster
Benign
D;D;D
PrimateAI
Pathogenic
D
PROVEAN
Benign
N;.
REVEL
Benign
Sift
Pathogenic
D;.
Sift4G
Uncertain
D;.
Vest4
MutPred
Loss of glycosylation at P1477 (P = 0.0076);Loss of glycosylation at P1477 (P = 0.0076);
MVP
MPC
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.