NM_021625.5:c.832G>A

Variant names:

• chr12-109800639-C-T
• rs267607148
• NM_021625.5:c.832G>A

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 6P and 1B. PM1 PM2 PP5_Moderate BP4

The NM_021625.5(TRPV4):​c.832G>A​(p.Glu278Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E278D) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TRPV4 NM_021625.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2 O:1
• Conservation: PhyloP100: 1.58
• Publications: 12 publications found

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 Gene-Disease associations (from GenCC):

• metatropic dysplasia

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P
• neuromuscular disease

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• spondylometaphyseal dysplasia, Kozlowski type

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
• TRPV4-related bone disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen, Illumina
• autosomal dominant brachyolmia

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp
• Charcot-Marie-Tooth disease axonal type 2C

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• scapuloperoneal spinal muscular atrophy, autosomal dominant

  Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics
• familial avascular necrosis of femoral head

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial digital arthropathy-brachydactyly

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• neuronopathy, distal hereditary motor, autosomal dominant 8

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• parastremmatic dwarfism

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_021625.5
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-109800639-C-T is Pathogenic according to our data. Variant chr12-109800639-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 18434.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.32223833). . Strength limited to SUPPORTING due to the PP5.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021625.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRPV4	NM_021625.5	MANE Select	c.832G>A	p.Glu278Lys	missense	Exon 5 of 16	NP_067638.3
	TRPV4	NM_001177431.1		c.730G>A	p.Glu244Lys	missense	Exon 5 of 16	NP_001170902.1
	TRPV4	NM_147204.2		c.832G>A	p.Glu278Lys	missense	Exon 4 of 14	NP_671737.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRPV4	ENST00000261740.7	TSL:1 MANE Select	c.832G>A	p.Glu278Lys	missense	Exon 5 of 16	ENSP00000261740.2
	TRPV4	ENST00000418703.7	TSL:1	c.832G>A	p.Glu278Lys	missense	Exon 4 of 15	ENSP00000406191.2
	TRPV4	ENST00000536838.1	TSL:1	c.730G>A	p.Glu244Lys	missense	Exon 5 of 16	ENSP00000444336.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Charcot-Marie-Tooth disease axonal type 2C (1)
1	-	-	Spondylometaphyseal dysplasia, Kozlowski type (1)
-	-	-	Neuromuscular disease;C0410528:Skeletal dysplasia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.26
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.21	T
Eigen	Benign	0.095
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.93	D
M_CAP	Benign	0.064	D
MetaRNN	Benign	0.32	T
MetaSVM	Uncertain	0.14	D
MutationAssessor	Benign	0.41	N
PhyloP100		1.6
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	0.28	N
REVEL	Uncertain	0.58
Sift	Benign	0.64	T
Sift4G	Benign	0.79	T
Polyphen		0.96	D
Vest4		0.82
MutPred		0.42		Gain of ubiquitination at E278 (P = 0.0198)
MVP		0.90
MPC		0.66
ClinPred		0.88	D
GERP RS		4.9
Varity_R		0.57
gMVP		0.69
Mutation Taster		=2/98	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: rs267607148; hg19: chr12-110238444;