rs779671497

Positions:

• chrX-68073172-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_002547.3(OPHN1):​c.1814C>T​(p.Ser605Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000639 in 1,095,795 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000064 (0 hom. 1 hem.)
• Consequence: OPHN1 NM_002547.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.88

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.1620847).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OPHN1	NM_002547.3	c.1814C>T	p.Ser605Phe	missense_variant	20/25	ENST00000355520.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OPHN1	ENST00000355520.6	c.1814C>T	p.Ser605Phe	missense_variant	20/25	1	NM_002547.3	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000639 AC: 7 AN: 1095795 Hom.: 0 Cov.: 30 AF XY: 0.00000277 AC XY: 1 AN XY: 361439

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: 0.00000832

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Sep 08, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	T
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.75	T
M_CAP	Benign	0.0099	T
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.8	L
MutationTaster	Benign	0.69	D;D
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.12
Sift	Benign	0.12	T
Sift4G	Benign	0.65	T
Polyphen		0.21	B
Vest4		0.18
MutPred		0.29		Loss of phosphorylation at S605 (P = 0.0453);
MVP		0.41
MPC		0.14
ClinPred		0.57	D
GERP RS		4.6
Varity_R		0.24
gMVP		0.39

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

Other links and lift over

dbSNP: rs779671497; hg19: chrX-67293014;