Is EGFR p.Ala21= (c.63G>T) pathogenic?

EGFR p.Ala21= (c.63G>T) is classified Likely benign in EGFR (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-07-15). Absent from gnomAD v4.1; Associated with EGFR-related lung cancer.

What condition is associated with EGFR p.Ala21= (c.63G>T)?

EGFR p.Ala21= (c.63G>T) is associated with EGFR-related lung cancer, hereditary neoplastic syndrome (ClinVar).

How common is EGFR p.Ala21= (c.63G>T) in the general population?

EGFR p.Ala21= (c.63G>T) is absent from gnomAD v4.1 (gnomAD).

EGFR p.Ala21=

c.63G>T · rs1421885942 · VCV1542532

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,517,804)

Conditions

EGFR-related lung cancer

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 0.93	GERP -0.82, phastCons 0.013
Overall
CADD	11.26	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,517,804). 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: EGFR
Protein: p.Ala21=
Coding: c.63G>T
MANE Select: NM_005228
dbSNP: rs1421885942
Type: single nucleotide variant
Location: chr7:55019340 (GRCh38)
Gene constraint: LOEUF 0.475 · pLI 0.98 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 76.29 · 393 PDB

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

Disease context

Also linked: hereditary neoplastic syndrome

Similar variants

EGFR p.Ala21Val Uncertain significance ★★ ⚠ same residue
EGFR p.Ala21Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
EGFR p.Ala21Thr Conflicting classifications of pathogenicity ★ ⚠ same residue
EGFR p.Ala21_Ser22insArgAla Uncertain significance ★★ same residue
EGFR c.1207+5G>A Uncertain significance ★★ same condition
EGFR c.1298+3A>G Uncertain significance ★★ same condition
EGFR c.1298+4A>G Uncertain significance ★★ same condition
EGFR c.1298+6T>C Uncertain significance ★★ 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/egfr-p-ala21 (accessed [today's date]).

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