Is VHL p.Pro81= (c.243G>C) pathogenic?

VHL p.Pro81= (c.243G>C) is classified Benign/Likely benign in VHL (ClinVar, Multiple submitters, 3 submitters; last evaluated 2026-06-08). Very rare (popmax 8.48e-05%, nfe); Associated with Chuvash polycythemia.

What condition is associated with VHL p.Pro81= (c.243G>C)?

VHL p.Pro81= (c.243G>C) is associated with Chuvash polycythemia, von Hippel-Lindau disease, hereditary neoplastic syndrome (ClinVar).

How common is VHL p.Pro81= (c.243G>C) in the general population?

VHL p.Pro81= (c.243G>C) is very rare (popmax 8.48e-05%, nfe) (gnomAD).

How is Chuvash erythrocytosis inherited?

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

VHL p.Pro81=

c.243G>C · rs758034030 · VCV2927601

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 8.48e-05%, nfe)

Conditions

Chuvash polycythemia

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.29	GERP 0.53, phastCons 0.038
Overall
CADD	12.23	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.48e-05% European (non-Finnish) · 1/1,179,662 alleles

Overall 6.23e-05% 1/1,604,786 alleles · very rare exomes 1/1,452,522 · genomes 0/152,264 · 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: VHL
Protein: p.Pro81=
Coding: c.243G>C
MANE Select: NM_000551
dbSNP: rs758034030
Type: single nucleotide variant
Location: chr3:10142090 (GRCh38)
Gene constraint: LOEUF 0.987 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 85.45 · 143 PDB
Residue 81: a β-strand; a UniProt-annotated variant site (in vhld; benign; type i)

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

Disease context

Chuvash polycythemia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: von Hippel-Lindau disease hereditary neoplastic syndrome

For Chuvash erythrocytosis (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

VHL p.Pro81Ser Benign ★★★ ⚠ same residue
VHL p.Pro81Leu Pathogenic/Likely pathogenic ★★ same residue
VHL p.Pro81Ala Uncertain significance ★ ⚠ same residue
VHL p.Pro81Gln Conflicting classifications of pathogenicity ★ ⚠ same residue
VHL p.Pro81Thr Conflicting classifications of pathogenicity ★ same residue
VHL p.Arg64Pro Pathogenic ★★★ same condition
VHL p.Asn78Ser Pathogenic ★★★ ⚠ same condition
VHL p.Glu70Ter 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/vhl-p-pro81 (accessed [today's date]).

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