Is ENG p.Gln166His (c.498G>C) pathogenic?

ENG p.Gln166His (c.498G>C) is classified Uncertain significance in ENG (ClinVar, Single submitter, 2 submitters; last evaluated 2018-12-07). AlphaMissense: likely benign (0.1615); Absent from gnomAD v4.1; Associated with hereditary hemorrhagic telangiectasia.

What condition is associated with ENG p.Gln166His (c.498G>C)?

ENG p.Gln166His (c.498G>C) is associated with hereditary hemorrhagic telangiectasia, telangiectasia, hereditary hemorrhagic, type 1 (ClinVar).

How common is ENG p.Gln166His (c.498G>C) in the general population?

ENG p.Gln166His (c.498G>C) is absent from gnomAD v4.1 (gnomAD).

How is Hereditary hemorrhagic telangiectasia inherited?

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

What do computational predictors say about ENG p.Gln166His (c.498G>C)?

AlphaMissense predicts likely benign (score 0.1615) — an in-silico prediction, not a clinical call.

ENG p.Gln166His

c.498G>C · rs1167818567 · VCV641345

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1615 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary hemorrhagic telangiectasia

Computational evidence

Protein change
AlphaMissense	0.1615	likely benign
REVEL	0.088	moderately benign-leaning
SaProt	LLR -6.90	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.85	GERP -4.1
Regional constraint	o/e 0.86	unconstrained · MANE · 39 kb · p 5.2e-05 · regional, not allelic
Overall
CADD	1.315	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — 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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: ENG
Protein: p.Gln166His
Coding: c.498G>C
MANE Select: NM_001114753
dbSNP: rs1167818567
Type: single nucleotide variant
Location: chr9:127826535 (GRCh38)
Gene constraint: LOEUF 0.374 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 80.84 · 3 PDB
Residue 166: a β-strand; a disulfide bond; the 'required for interaction with gdf2' region; the 'or2' region

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

Disease context

hereditary hemorrhagic telangiectasia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: telangiectasia, hereditary hemorrhagic, type 1

For Hereditary hemorrhagic telangiectasia (Orphanet):

Inheritance: Autosomal dominant
Onset: All ages
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

ENG p.Gln166Arg Uncertain significance ★★ ⚠ same residue
ENG p.Gln166Ter Pathogenic ★ same residue
ENG p.Gln166Pro Conflicting classifications of pathogenicity ★ ⚠ same residue
ENG p.Gln166fs Pathogenic/Likely pathogenic ★★ same residue
ENG p.Gln166= Likely benign ★ same residue
ENG p.Arg529His Pathogenic ★★★ same condition
ENG p.Asn423Ser Likely pathogenic ★★★ ⚠ same condition
ENG p.Cys382Tyr 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/eng-p-gln166his (accessed [today's date]).

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