X-68432888-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_002547.3(OPHN1):c.133G>A(p.Ala45Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00155 in 1,210,661 control chromosomes in the GnomAD database, including 4 homozygotes. There are 587 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0013 ( 1 hom., 38 hem., cov: 24)

Exomes 𝑓: 0.0016 ( 3 hom. 549 hem. )

Consequence

OPHN1
NM_002547.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: -1.11

Variant links:

Genes affected

OPHN1 (HGNC:8148): (oligophrenin 1) This gene encodes a Rho-GTPase-activating protein that promotes GTP hydrolysis of Rho subfamily members. Rho proteins are important mediators of intracellular signal transduction, which affects cell migration and cell morphogenesis. Mutations in this gene are responsible for OPHN1-related X-linked cognitive disability with cerebellar hypoplasia and distinctive facial dysmorhphism. [provided by RefSeq, Jul 2008]

OPHN1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0061807036).

BP6

Variant X-68432888-C-T is Benign according to our data. Variant chrX-68432888-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 94073.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-68432888-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00131 (148/112716) while in subpopulation NFE AF= 0.00206 (110/53331). AF 95% confidence interval is 0.00175. There are 1 homozygotes in gnomad4. There are 38 alleles in male gnomad4 subpopulation. Median coverage is 24. This position pass quality control queck.

BS2

High Hemizygotes in GnomAd4 at 38 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OPHN1	NM_002547.3 link	c.133G>A	p.Ala45Thr	missense_variant	Exon 2 of 25	ENST00000355520.6	NP_002538.1	O60890-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OPHN1	ENST00000355520.6 link	c.133G>A	p.Ala45Thr	missense_variant	Exon 2 of 25	1	NM_002547.3	ENSP00000347710.5		O60890-1

Frequencies

GnomAD3 genomes

AF:

0.00131

AC:

148

AN:

112663

Hom.:

Cov.:

AF XY:

0.00109

AC XY:

AN XY:

34789

show subpopulations

Gnomad AFR

AF:

0.000257

Gnomad AMI

AF:

0.0322

Gnomad AMR

AF:

0.000562

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:

0.00206

Gnomad OTH

AF:

0.00132

GnomAD3 exomes

AF:

0.000906

AC:

166

AN:

183238

Hom.:

AF XY:

0.000931

AC XY:

AN XY:

67686

show subpopulations

Gnomad AFR exome

AF:

0.0000760

Gnomad AMR exome

AF:

0.000583

Gnomad ASJ exome

AF:

0.000267

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000105

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00171

Gnomad OTH exome

AF:

0.00110

GnomAD4 exome

AF:

0.00158

AC:

1734

AN:

1097945

Hom.:

Cov.:

AF XY:

0.00151

AC XY:

549

AN XY:

363305

show subpopulations

Gnomad4 AFR exome

AF:

0.000114

Gnomad4 AMR exome

AF:

0.000540

Gnomad4 ASJ exome

AF:

0.000206

Gnomad4 EAS exome

AF:

0.0000331

Gnomad4 SAS exome

AF:

0.0000739

Gnomad4 FIN exome

AF:

0.000247

Gnomad4 NFE exome

AF:

0.00193

Gnomad4 OTH exome

AF:

0.00152

GnomAD4 genome

AF:

0.00131

AC:

148

AN:

112716

Hom.:

Cov.:

AF XY:

0.00109

AC XY:

AN XY:

34852

show subpopulations

Gnomad4 AFR

AF:

0.000257

Gnomad4 AMR

AF:

0.000562

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00206

Gnomad4 OTH

AF:

0.00131

Alfa

AF:

0.00167

Hom.:

Bravo

AF:

0.00143

TwinsUK

AF:

0.00216

AC:

ALSPAC

AF:

0.00208

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00178

AC:

ExAC

AF:

0.000881

AC:

107

EpiCase

AF:

0.00180

EpiControl

AF:

0.00202

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:5

Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Jun 05, 2015	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 09, 2019	This variant is associated with the following publications: (PMID: 16221952, 10818214) -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 30, 2025	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Feb 16, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 08, 2013	- -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Sep 26, 2013	- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 25, 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. -

X-linked intellectual disability-cerebellar hypoplasia syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 26, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.84

BayesDel_noAF

Benign

-0.98

CADD

Benign

DANN

Benign

0.90

DEOGEN2

Benign

0.042

FATHMM_MKL

Benign

0.039

LIST_S2

Uncertain

0.92

M_CAP

Benign

0.0096

MetaRNN

Benign

0.0062

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

PrimateAI

Benign

0.45

PROVEAN

Benign

-0.22

REVEL

Benign

0.028

Sift

Benign

0.57

Sift4G

Benign

0.63

Polyphen

0.46

Vest4

0.049

MVP

0.58

MPC

0.96

ClinPred

0.0056

GERP RS

-0.81

Varity_R

0.051

gMVP

0.48

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