Genetic Variant OPHN1:p.Leu111Leu (chrX-68274789-C-T) – ACMG Classification: Benign (-18 pts)

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBS1BS2

The NM_002547.3(OPHN1):c.333G>A(p.Leu111Leu) variant causes a synonymous change. The variant allele was found at a frequency of 0.00003 in 1,201,685 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 15 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 0.000054 ( 0 hom., 3 hem., cov: 23)

Exomes 𝑓: 0.000028 ( 0 hom. 12 hem. )

Consequence

OPHN1
NM_002547.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 4.71

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

X-linked intellectual disability-cerebellar hypoplasia syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)

OPHN1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.34).

BP6

Variant X-68274789-C-T is Benign according to our data. Variant chrX-68274789-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 211794.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0000535 (6/112112) while in subpopulation SAS AF = 0.00188 (5/2661). AF 95% confidence interval is 0.00074. There are 0 homozygotes in GnomAd4. There are 3 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.

BS2

High Hemizygotes in GnomAd4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OPHN1	NM_002547.3 link	c.333G>A	p.Leu111Leu	synonymous_variant	Exon 5 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.333G>A	p.Leu111Leu	synonymous_variant	Exon 5 of 25	1	NM_002547.3	ENSP00000347710.5		O60890-1

Frequencies

GnomAD3 genomes

AF:

0.0000535

AC:

AN:

112058

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:

0.00187

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000662

GnomAD2 exomes

AF:

0.0000985

AC:

AN:

182665

AF XY:

0.0000743

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:

0.000223

GnomAD4 exome

AF:

0.0000275

AC:

AN:

1089573

Hom.:

Cov.:

AF XY:

0.0000337

AC XY:

AN XY:

355557

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26234

American (AMR)

AF:

0.00

AC:

AN:

35132

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19270

East Asian (EAS)

AF:

0.00

AC:

AN:

30055

South Asian (SAS)

AF:

0.000390

AC:

AN:

53853

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40188

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3931

European-Non Finnish (NFE)

AF:

0.00000120

AC:

AN:

835157

Other (OTH)

AF:

0.000175

AC:

AN:

45753

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.447

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:

0.0000535

AC:

AN:

112112

Hom.:

Cov.:

AF XY:

0.0000874

AC XY:

AN XY:

34316

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30890

American (AMR)

AF:

0.00

AC:

AN:

10549

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2657

East Asian (EAS)

AF:

0.00

AC:

AN:

3577

South Asian (SAS)

AF:

0.00188

AC:

AN:

2661

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6100

Middle Eastern (MID)

AF:

0.00

AC:

AN:

218

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

53241

Other (OTH)

AF:

0.000654

AC:

AN:

1530

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

May 15, 2015

Genetic Services Laboratory, University of Chicago

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Dec 17, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.34

CADD

Benign

(source)

DANN

Benign

0.80

PhyloP100

4.7

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over