Is CACNA2D1 p.Tyr855= (c.2565T>C) pathogenic?

CACNA2D1 p.Tyr855= (c.2565T>C) is classified Likely benign in CACNA2D1 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-10-01). Ultra-rare (popmax 0.01%, amr); Associated with Brugada syndrome.

What condition is associated with CACNA2D1 p.Tyr855= (c.2565T>C)?

CACNA2D1 p.Tyr855= (c.2565T>C) is associated with Brugada syndrome (ClinVar).

How common is CACNA2D1 p.Tyr855= (c.2565T>C) in the general population?

CACNA2D1 p.Tyr855= (c.2565T>C) is ultra-rare (popmax 0.01%, amr) (gnomAD).

How is Brugada syndrome inherited?

Typically Autosomal dominant, Not applicable (Orphanet). A genetic counselor can assess individual risk for a family.

CACNA2D1 p.Tyr855=

c.2565T>C · rs1321225032 · VCV1793167

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.01%, amr)

Conditions

Brugada syndrome

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 1.2	GERP -1.2, phastCons 1
Overall
CADD	5.543	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.01% Admixed American · 6/59,742 alleles

Filtering AF 0.0043% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00296%

Overall 0.00071% 11/1,548,402 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.01%	9,957
African / African-American	0.00272%	36,761
South Asian	0.00111%	89,822
European (non-Finnish)	0.000178%	560,412

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: CACNA2D1
Protein: p.Tyr855=
Coding: c.2565T>C
MANE Select: NM_000722
dbSNP: rs1321225032
Type: single nucleotide variant
Location: chr7:81965603 (GRCh38)
Gene constraint: LOEUF 0.437 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 86.97 · 30 PDB
Residue 855: an α-helix; a disulfide bond

Full CACNA2D1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Brugada syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Brugada syndrome (Orphanet):

Inheritance: Autosomal dominant, Not applicable
Onset: Adult, Childhood
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

CACNA2D1 c.1662+3G>A Uncertain significance ★★ same condition
CACNA2D1 c.2574+3A>G Uncertain significance ★★ same condition
CACNA2D1 c.3160-1G>A Uncertain significance ★★ same condition
CACNA2D1 p.Ala1022Glu Uncertain significance ★★ ⚠ same condition
CACNA2D1 p.Ala104Thr Uncertain significance ★★ ⚠ same condition
CACNA2D1 p.Ala104Val Uncertain significance ★★ ⚠ same condition
CACNA2D1 p.Ala30Pro Uncertain significance ★★ ⚠ same condition
CACNA2D1 p.Ala321Thr 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/cacna2d1-p-tyr855 (accessed [today's date]).

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