Is ECEL1 p.Cys23Ter (c.69C>A) pathogenic?

ECEL1 p.Cys23Ter (c.69C>A) is classified Pathogenic in ECEL1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-03-23). Absent from gnomAD v4.1.

How common is ECEL1 p.Cys23Ter (c.69C>A) in the general population?

ECEL1 p.Cys23Ter (c.69C>A) is absent from gnomAD v4.1 (gnomAD).

ECEL1 p.Cys23Ter

c.69C>A · VCV3340907

Pathogenic Single submitter

Classification

Pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,412,818)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 2 of 18
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.26	GERP -2.3, phastCons 0.9
Overall
CADD	34.0	PHRED · no single calibrated threshold — expert panels disagree

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,412,818). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: ECEL1
Protein: p.Cys23Ter
Coding: c.69C>A
MANE Select: NM_004826
Type: single nucleotide variant
Location: chr2:232486585 (GRCh38)
Gene constraint: LOEUF 1.099 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 88.62

Full ECEL1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ECEL1 c.1685+1G>A Pathogenic ★★ same type
ECEL1 c.2151+2T>C Likely pathogenic ★★ same type
ECEL1 c.966+1G>A Pathogenic ★★ same type
ECEL1 p.Ala675Thr Pathogenic ★★ same type
ECEL1 p.Arg333Ter Pathogenic ★★ same type
ECEL1 p.Arg395Gln Pathogenic/Likely pathogenic ★★ ⚠ same type
ECEL1 p.Arg418Cys Likely pathogenic ★★ same type
ECEL1 p.Gln435Ter Pathogenic/Likely pathogenic ★★ same type

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/ecel1-p-cys23ter (accessed [today's date]).

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