Is TRPV4 p.Val620Phe (c.1858G>T) pathogenic?

TRPV4 p.Val620Phe (c.1858G>T) is classified Uncertain significance in TRPV4 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-17). AlphaMissense: likely pathogenic (0.969); Very rare (popmax 0.00134%, afr); Associated with Charcot-Marie-Tooth disease axonal type 2C.

What condition is associated with TRPV4 p.Val620Phe (c.1858G>T)?

TRPV4 p.Val620Phe (c.1858G>T) is associated with Charcot-Marie-Tooth disease axonal type 2C (ClinVar).

How common is TRPV4 p.Val620Phe (c.1858G>T) in the general population?

TRPV4 p.Val620Phe (c.1858G>T) is very rare (popmax 0.00134%, afr) (gnomAD).

What do computational predictors say about TRPV4 p.Val620Phe (c.1858G>T)?

AlphaMissense predicts likely pathogenic (score 0.969) — an in-silico prediction, not a clinical call.

TRPV4 p.Val620Phe

Q: How is Autosomal dominant Charcot-Marie-Tooth disease type 2C inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.1858G>T · VCV3679683

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.969 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00134%, afr)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Charcot-Marie-Tooth disease axonal type 2C

Computational evidence

Protein change
AlphaMissense	0.969	likely pathogenic
REVEL	0.894	moderately pathogenic-leaning
SaProt	LLR -11.92	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 2.2, phastCons 1
Regional constraint	o/e 0.68	unconstrained · MANE · 8,802 bp · p 1.8e-09 · regional, not allelic
Overall
CADD	29.2	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00134% African / African-American · 1/74,884 alleles

Overall 6.2e-05% 1/1,613,774 alleles · very rare exomes 0/1,461,682 · genomes 1/152,092 · joint denominator

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: TRPV4
Protein: p.Val620Phe
Coding: c.1858G>T
MANE Select: NM_021625
Type: single nucleotide variant
Location: chr12:109792396 (GRCh38)
Gene constraint: LOEUF 0.824 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.06 · 19 PDB
Residue 620: an α-helix; a UniProt-annotated variant site (in bcym3; results in a gain of function and a constitutive activation of the channel)

Full TRPV4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Charcot-Marie-Tooth disease axonal type 2C — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal dominant Charcot-Marie-Tooth disease type 2C (Orphanet):

Inheritance: Autosomal dominant
Onset: Adolescent, Adult, Childhood, Infancy

Similar variants

TRPV4 p.Val620Ile Pathogenic/Likely pathogenic ★★ ⚠ same residue
TRPV4 p.Arg186Gln Pathogenic/Likely pathogenic ★★ same condition
TRPV4 p.Arg232Cys Pathogenic ★★ ⚠ same condition
TRPV4 p.Arg269Cys Pathogenic ★★ ⚠ same condition
TRPV4 p.Arg269His Pathogenic/Likely pathogenic ★★ same condition
TRPV4 p.Arg315Gln Pathogenic/Likely pathogenic ★★ ⚠ same condition
TRPV4 p.Arg315Trp Pathogenic/Likely pathogenic ★★ ⚠ same condition
TRPV4 p.Arg316Cys Pathogenic ★★ ⚠ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/trpv4-p-val620phe (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown