Is EEF1A2 p.Asn311= (c.933T>C) pathogenic?

EEF1A2 p.Asn311= (c.933T>C) is classified Likely benign in EEF1A2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-22). Absent from gnomAD v4.1; Associated with developmental and epileptic encephalopathy, 33.

What condition is associated with EEF1A2 p.Asn311= (c.933T>C)?

EEF1A2 p.Asn311= (c.933T>C) is associated with developmental and epileptic encephalopathy, 33 (ClinVar).

How common is EEF1A2 p.Asn311= (c.933T>C) in the general population?

EEF1A2 p.Asn311= (c.933T>C) is absent from gnomAD v4.1 (gnomAD).

EEF1A2 p.Asn311=

Q: How is Non-specific early-onset epileptic encephalopathy inherited?

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

c.933T>C · rs2145940054 · VCV1086654

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

developmental and epileptic encephalopathy, 33

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · A>C here scores Δ0.81 · evaluated, not missing
Constraint at this position
Conservation	phyloP -6.3	GERP -3.8
Overall
CADD	0.093	PHRED · no single calibrated threshold — expert panels disagree

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: EEF1A2
Protein: p.Asn311=
Coding: c.933T>C
MANE Select: NM_001958
dbSNP: rs2145940054
Type: single nucleotide variant
Location: chr20:63490575 (GRCh38)
Gene constraint: LOEUF 0.314 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 88.70 · 2 PDB
Residue 311: a β-strand

Full EEF1A2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

developmental and epileptic encephalopathy, 33 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Non-specific early-onset epileptic encephalopathy (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, Not applicable
Onset: Infancy, Neonatal

Similar variants

EEF1A2 p.Asn311Lys Likely pathogenic ★ same residue
EEF1A2 p.Arg266Trp Pathogenic/Likely pathogenic ★★ same condition
EEF1A2 p.Arg423Cys Pathogenic/Likely pathogenic ★★ same condition
EEF1A2 p.Arg69Cys Pathogenic ★★ same condition
EEF1A2 p.Asp91Asn Pathogenic ★★ same condition
EEF1A2 p.Asp97Asn Pathogenic/Likely pathogenic ★★ same condition
EEF1A2 p.Glu122Lys Pathogenic/Likely pathogenic ★★ same condition
EEF1A2 p.Glu124Lys 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/eef1a2-p-asn311 (accessed [today's date]).

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