rs77975504

Positions:

chr12-109792695-C-T

Variant summary

Our verdict is Pathogenic. Variant got 17 ACMG points: 17P and 0B. PM1PM2PM5PP2PP3_ModeratePP5_Very_Strong

The NM_021625.5(TRPV4):c.1781G>A(p.Arg594His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R594C) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TRPV4
NM_021625.5 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:15O:1

Conservation

PhyloP100: 7.91

Variant links:

Genes affected

TRPV4 (HGNC:18083): (transient receptor potential cation channel subfamily V member 4) This gene encodes a member of the OSM9-like transient receptor potential channel (OTRPC) subfamily in the transient receptor potential (TRP) superfamily of ion channels. The encoded protein is a Ca2+-permeable, nonselective cation channel that is thought to be involved in the regulation of systemic osmotic pressure. Mutations in this gene are the cause of spondylometaphyseal and metatropic dysplasia and hereditary motor and sensory neuropathy type IIC. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2010]

TRPV4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 17 ACMG points.

PM1

In a topological_domain Cytoplasmic (size 14) in uniprot entity TRPV4_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_021625.5

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr12-109792696-G-A is described in Lovd as [Likely_pathogenic].

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), TRPV4. . Gene score misZ: 1.9225 (greater than the threshold 3.09). Trascript score misZ: 3.5609 (greater than threshold 3.09). The gene has 63 curated pathogenic missense variants (we use a threshold of 10). The gene has 35 curated benign missense variants. GenCC has associacion of the gene with TRPV4-related bone disorder, metatropic dysplasia, Charcot-Marie-Tooth disease axonal type 2C, spondylometaphyseal dysplasia, Kozlowski type, familial avascular necrosis of femoral head, parastremmatic dwarfism, neuromuscular disease, autosomal dominant brachyolmia, familial digital arthropathy-brachydactyly, neuronopathy, distal hereditary motor, autosomal dominant 8, scapuloperoneal spinal muscular atrophy, autosomal dominant.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.931

PP5

Variant 12-109792695-C-T is Pathogenic according to our data. Variant chr12-109792695-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 4994.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-109792695-C-T is described in Lovd as [Pathogenic]. Variant chr12-109792695-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TRPV4	NM_021625.5 link	c.1781G>A	p.Arg594His	missense_variant	11/16	ENST00000261740.7	NP_067638.3	Q9HBA0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TRPV4	ENST00000261740.7 link	c.1781G>A	p.Arg594His	missense_variant	11/16	1	NM_021625.5	ENSP00000261740.2		Q9HBA0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1461864

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727232

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:15Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Spondylometaphyseal dysplasia, Kozlowski type

Pathogenic:6

Pathogenic, criteria provided, single submitter	clinical testing	Centogene AG - the Rare Disease Company	Aug 02, 2021	- -
Pathogenic, no assertion criteria provided	clinical testing	Biochemical Molecular Genetic Laboratory, King Abdulaziz Medical City	May 06, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	3billion	Sep 01, 2022	The variant is not observed in the gnomAD v2.1.1 dataset. It is located in a mutational hot spot and/or well-established functional domain in which established pathogenic variants have been reported. Missense changes are a common disease-causing mechanism. In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.89; 3Cnet: 0.77). Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000004994). Different missense changes at the same codon (p.Arg594Cys, p.Arg594Ser) have been reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV001224354 , VCV001484191). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline. -
Pathogenic, no assertion criteria provided	literature only	OMIM	Oct 01, 2010	- -
Pathogenic, criteria provided, single submitter	clinical testing	Kasturba Medical College, Manipal, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Laboratory of Medical Genetics, National & Kapodistrian University of Athens	Aug 10, 2021	PM1, PM2, PP2, PP3, PP5 -

not provided

Pathogenic:4

Pathogenic, criteria provided, single submitter	clinical testing	Blueprint Genetics	Nov 30, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Nov 22, 2023	Published functional studies demonstrate that R594H leads to increased constitutive and agonist-responsive activity, and R594 transgenic mice exhibited severe skeletal abnormalities (PMID: 19232556, 24644033); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 20577006, 21658220, 29776788, 20503319, 21573172, 28687525, 22791502, 24644033, 30945278, 32036093, 34008892, 32381727, 19232556) -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Molecular Diagnostics Lab, Nemours Children's Health, Delaware	May 27, 2016	- -

Inborn genetic diseases

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 07, 2022

The c.1781G>A (p.R594H) alteration is located in exon 11 (coding exon 10) of the TRPV4 gene. This alteration results from a G to A substitution at nucleotide position 1781, causing the arginine (R) at amino acid position 594 to be replaced by a histidine (H). This variant was not reported in population-based cohorts in the Genome Aggregation Database (gnomAD). This variant has been detected in multiple individuals with Kozlowski type spondylometaphyseal dysplasia and metatropic dysplasia, including some cases of reported de novo occurrence (Krakow, 2009; Dai, 2010; Andreucci, 2011; Zhang, 2015; Bieganski, 2017; Hsu, 2019). Another alteration at the same codon, c.1780C>A (p.R594S), has been described in an individual with metatropic dysplasia (Andreucci, 2011). This amino acid position is highly conserved in available vertebrate species. Functional analysis demonstrated that the p.R594H alteration altered basal calcium channel activity in vitro (Krakow, 2009). This alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, this alteration is classified as pathogenic. -

Neuronopathy, distal hereditary motor, autosomal dominant 8

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Jun 30, 2021

ACMG classification criteria: PS3 supporting, PS4 strong, PM2 moderate, PP3 supporting -

Charcot-Marie-Tooth disease axonal type 2C

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 20, 2023

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 594 of the TRPV4 protein (p.Arg594His). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with spondylometaphyseal dysplasia, Kozlowski type as well as other related skeletal dysplasias (PMID: 19232556, 20503319, 20577006, 21658220). ClinVar contains an entry for this variant (Variation ID: 4994). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on TRPV4 protein function. Experimental studies have shown that this missense change affects TRPV4 function (PMID: 19232556, 21573172). For these reasons, this variant has been classified as Pathogenic. -

Parastremmatic dwarfism

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Oct 01, 2010

- -

Metatropic dysplasia

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Oct 01, 2010

- -

Neuromuscular disease;C0410528:Skeletal dysplasia

Other:1

not provided, no classification provided

literature only

GeneReviews

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.91

BayesDel_addAF

Pathogenic

0.47

BayesDel_noAF

Pathogenic

0.44

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.99

D;D;.;.;.;.

Eigen

Pathogenic

0.94

Eigen_PC

Pathogenic

0.88

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.98

.;D;D;D;D;D

M_CAP

Uncertain

0.24

MetaRNN

Pathogenic

0.93

D;D;D;D;D;D

MetaSVM

Pathogenic

0.83

MutationAssessor

Pathogenic

3.5

H;H;.;.;.;.

PrimateAI

Pathogenic

0.90

PROVEAN

Pathogenic

-4.8

D;D;D;D;D;D

REVEL

Pathogenic

0.89

Sift

Pathogenic

0.0

D;D;D;D;D;D

Sift4G

Uncertain

0.0020

D;D;D;D;D;D

Polyphen

1.0

D;D;D;D;D;D

Vest4

0.91

MutPred

0.80

Gain of catalytic residue at L596 (P = 2e-04);Gain of catalytic residue at L596 (P = 2e-04);.;.;.;.;

MVP

0.99

MPC

2.3

ClinPred

1.0

GERP RS

6.1

Varity_R

0.72

gMVP

0.88

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