12-109798917-G-T

Variant names:

• chr12-109798917-G-T
• rs116401333
• NM_021625.5:c.854-5C>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_021625.5(TRPV4):​c.854-5C>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,455,690 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: TRPV4 NM_021625.5 splice_region, intron
• Scores: Splicing: ADA: 0.9980
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.222
• Publications: 0 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 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

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.854-5C>A		splice_region intron	N/A	NP_067638.3
	TRPV4	NM_001177431.1		c.752-5C>A		splice_region intron	N/A	NP_001170902.1
	TRPV4	NM_001177428.1		c.713-5C>A		splice_region intron	N/A	NP_001170899.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRPV4	ENST00000261740.7	TSL:1 MANE Select	c.854-5C>A		splice_region intron	N/A	ENSP00000261740.2
	TRPV4	ENST00000418703.7	TSL:1	c.854-5C>A		splice_region intron	N/A	ENSP00000406191.2
	TRPV4	ENST00000536838.1	TSL:1	c.752-5C>A		splice_region intron	N/A	ENSP00000444336.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.87e-7 AC: 1 AN: 1455690 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 723364

African (AFR) AF: 0.00 AC: 0 AN: 33414

American (AMR) AF: 0.00 AC: 0 AN: 44666

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26034

East Asian (EAS) AF: 0.00 AC: 0 AN: 39618

South Asian (SAS) AF: 0.00 AC: 0 AN: 86092

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51180

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5738

European-Non Finnish (NFE) AF: 9.02e-7 AC: 1 AN: 1108760

Other (OTH) AF: 0.00 AC: 0 AN: 60188

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	19
DANN	Benign	0.57
PhyloP100		-0.22

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.93
SpliceAI score (max)		0.97		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.97		Position offset: -2

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

Other links and lift over

dbSNP: rs116401333; hg19: chr12-110236722;