Is ELN p.Tyr677= (c.2031C>T) pathogenic?

ELN p.Tyr677= (c.2031C>T) is classified Uncertain significance in ELN (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-14). Very rare (popmax 0.00446%, eas); Associated with supravalvular aortic stenosis.

What condition is associated with ELN p.Tyr677= (c.2031C>T)?

ELN p.Tyr677= (c.2031C>T) is associated with supravalvular aortic stenosis (ClinVar).

How common is ELN p.Tyr677= (c.2031C>T) in the general population?

ELN p.Tyr677= (c.2031C>T) is very rare (popmax 0.00446%, eas) (gnomAD).

ELN p.Tyr677=

c.2031C>T · rs1554688700 · VCV2046078

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00446%, eas)

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 -9.5	GERP -6.2
Overall
CADD	0.558	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00446% East Asian · 2/44,890 alleles

Filtering AF 0.000875% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000443%

Overall 0.000744% 12/1,613,896 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00446%	22,445
South Asian	0.00329%	30,365
African / African-American	0.00134%	74,850
European (non-Finnish)	0.000508%	196,666

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.Tyr677=
Coding: c.2031C>T
MANE Select: NM_000501
dbSNP: rs1554688700
Type: single nucleotide variant
Location: chr7:74065731 (GRCh38)
Gene constraint: LOEUF 0.696 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 36.20
Residue 677: a modified residue (4-hydroxyproline; partial)

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 p.Tyr677Ter Likely pathogenic ★ same residue
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

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-tyr677 (accessed [today's date]).

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