NM_000276.4:c.2530C>T

Variant names:

• chrX-129589905-C-T
• rs387906484
• NM_000276.4:c.2530C>T

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000276.4(OCRL):​c.2530C>T​(p.Arg844*) variant causes a stop gained change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 23)
• Consequence: OCRL NM_000276.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 3.96
• Publications: 3 publications found

Genes affected

OCRL (HGNC:8108): (OCRL inositol polyphosphate-5-phosphatase) This gene encodes an inositol polyphosphate 5-phosphatase. This protein is involved in regulating membrane trafficking and is located in numerous subcellular locations including the trans-Golgi network, clathrin-coated vesicles and, endosomes and the plasma membrane. This protein may also play a role in primary cilium formation. Mutations in this gene cause oculocerebrorenal syndrome of Lowe and also Dent disease. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

OCRL Gene-Disease associations (from GenCC):

• Dent disease type 2

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, G2P, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
• oculocerebrorenal syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, Laboratory for Molecular Medicine, G2P

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-129589905-C-T is Pathogenic according to our data. Variant chrX-129589905-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 10857.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000276.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OCRL	NM_000276.4	MANE Select	c.2530C>T	p.Arg844*	stop_gained	Exon 23 of 24	NP_000267.2
	OCRL	NM_001318784.2		c.2533C>T	p.Arg845*	stop_gained	Exon 23 of 24	NP_001305713.1
	OCRL	NM_001587.4		c.2506C>T	p.Arg836*	stop_gained	Exon 22 of 23	NP_001578.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OCRL	ENST00000371113.9	TSL:1 MANE Select	c.2530C>T	p.Arg844*	stop_gained	Exon 23 of 24	ENSP00000360154.4
	OCRL	ENST00000357121.5	TSL:1	c.2506C>T	p.Arg836*	stop_gained	Exon 22 of 23	ENSP00000349635.5
	OCRL	ENST00000949289.1		c.2527C>T	p.Arg843*	stop_gained	Exon 23 of 24	ENSP00000619348.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Lowe syndrome (3)
2	-	-	Lowe syndrome;C1845167:Dent disease type 2 (2)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.62
CADD	Pathogenic	38
DANN	Uncertain	1.0
FATHMM_MKL	Uncertain	0.95	D
PhyloP100		4.0
Vest4		0.90
GERP RS		5.7
Mutation Taster		=3/197	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs387906484; hg19: chrX-128723882; COSMIC: COSV63981130;