Is ELN p.Phe266= (c.798C>T) pathogenic?

ELN p.Phe266= (c.798C>T) is classified Uncertain significance in ELN (ClinVar, Single submitter, 1 submitter; last evaluated 2022-08-31). Very rare (popmax 0.004%, afr); Associated with supravalvular aortic stenosis.

What condition is associated with ELN p.Phe266= (c.798C>T)?

ELN p.Phe266= (c.798C>T) is associated with supravalvular aortic stenosis (ClinVar).

How common is ELN p.Phe266= (c.798C>T) in the general population?

ELN p.Phe266= (c.798C>T) is very rare (popmax 0.004%, afr) (gnomAD).

ELN p.Phe266=

c.798C>T · rs552274876 · VCV1498945

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.004%, afr)

Conditions

supravalvular aortic stenosis

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 -2.2	GERP 1.2
Overall
CADD	2.644	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.004% African / African-American · 3/74,970 alleles

Filtering AF 0.00106% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000495%

Overall 0.000929% 15/1,613,868 alleles · very rare exomes 13/1,461,668 · genomes 2/152,200 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.004%	24,990
Admixed American	0.00167%	60,012
European (non-Finnish)	0.000932%	107,261

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: ELN
Protein: p.Phe266=
Coding: c.798C>T
MANE Select: NM_000501
dbSNP: rs552274876
Type: single nucleotide variant
Location: chr7:74048555 (GRCh38)
Gene constraint: LOEUF 0.696 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 36.20

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

Disease context

supravalvular aortic stenosis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ELN c.377-2A>G Pathogenic/Likely pathogenic ★★ same condition
ELN c.643+1G>C Likely pathogenic ★★ same condition
ELN c.686-2A>G Likely pathogenic ★★ same condition
ELN c.800-1G>A Pathogenic/Likely pathogenic ★★ same condition
ELN c.800-2A>G Pathogenic ★★ same condition
ELN c.800-3C>G Pathogenic ★★ same condition
ELN c.82+1G>A Pathogenic/Likely pathogenic ★★ same condition
ELN c.889+1G>A Pathogenic/Likely 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/eln-p-phe266 (accessed [today's date]).

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