Is CACNA2D2 p.Pro264= (c.792G>A) pathogenic?

CACNA2D2 p.Pro264= (c.792G>A) is classified Likely benign in CACNA2D2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-10-23). Ultra-rare (popmax 0.0174%, mid); Associated with early-infantile DEE.

What condition is associated with CACNA2D2 p.Pro264= (c.792G>A)?

CACNA2D2 p.Pro264= (c.792G>A) is associated with early-infantile DEE (ClinVar).

How common is CACNA2D2 p.Pro264= (c.792G>A) in the general population?

CACNA2D2 p.Pro264= (c.792G>A) is ultra-rare (popmax 0.0174%, mid) (gnomAD).

CACNA2D2 p.Pro264=

c.792G>A · rs764918367 · VCV2757395

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0174%, mid)

Conditions

early-infantile DEE

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 -15	GERP -4.8
Overall
CADD	0.182	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0174% Middle Eastern · 1/5,762 alleles

Filtering AF 0.000755% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000283%

Overall 0.000712% 11/1,544,312 alleles · ultra-rare exomes 9/1,392,318 · genomes 2/151,994 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0174%	5,762
East Asian	0.00456%	21,948
Admixed American	0.00207%	48,250
Remaining individualsnot grpmax-eligible	0.00169%	59,284
African / African-American	0.00138%	72,212
South Asian	0.00124%	80,626
European (non-Finnish)	0.000349%	286,476

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: CACNA2D2
Protein: p.Pro264=
Coding: c.792G>A
MANE Select: NM_006030
dbSNP: rs764918367
Type: single nucleotide variant
Location: chr3:50380798 (GRCh38)
Gene constraint: LOEUF 0.396 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 81.48

Full CACNA2D2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

early-infantile DEE — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CACNA2D2 p.Pro264Leu Uncertain significance ★ same residue
CACNA2D2 c.2234+1G>A Likely pathogenic ★★ same condition
CACNA2D2 p.Gln519Ter Pathogenic/Likely pathogenic ★★ same condition
CACNA2D2 c.1907+3A>C Uncertain significance ★★ same condition
CACNA2D2 c.785-3C>T Uncertain significance ★★ same condition
CACNA2D2 p.Ala1096Thr Uncertain significance ★★ ⚠ same condition
CACNA2D2 p.Ala253Thr Uncertain significance ★★ ⚠ same condition
CACNA2D2 p.Arg188Ser 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/cacna2d2-p-pro264 (accessed [today's date]).

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