Is CCM2 p.Pro82= (c.246C>T) pathogenic?

CCM2 p.Pro82= (c.246C>T) is classified Benign/Likely benign in CCM2 (ClinVar, Multiple submitters, 9 submitters; last evaluated 2026-01-26). Rare (popmax 0.316%, nfe); Associated with Inborn genetic diseases.

What condition is associated with CCM2 p.Pro82= (c.246C>T)?

CCM2 p.Pro82= (c.246C>T) is associated with Inborn genetic diseases, cerebral cavernous malformation 2 (ClinVar).

How common is CCM2 p.Pro82= (c.246C>T) in the general population?

CCM2 p.Pro82= (c.246C>T) is rare (popmax 0.316%, nfe) (gnomAD).

CCM2 p.Pro82=

c.246C>T · rs148244188 · VCV261968

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 9 submitters

gnomAD v4.1

Rare

rare (popmax 0.316%, nfe)

Conditions

Inborn genetic diseases

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	GERP -3.1, phastCons 0.001
Overall
CADD	7.101	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.316% European (non-Finnish) · 3,725/1,179,306 alleles

Filtering AF 0.307% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.304%

Overall 0.259% 4,184/1,613,334 alleles · rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.316%	317
Finnishnot grpmax-eligible	0.27%	370
Remaining individualsnot grpmax-eligible	0.211%	473
Ashkenazi Jewishnot grpmax-eligible	0.176%	569
Middle Eastern	0.115%	866
South Asian	0.0417%	2,397
Admixed American	0.0417%	2,401
African / African-American	0.0387%	2,586
East Asian	0.00669%	14,957

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: CCM2
Protein: p.Pro82=
Coding: c.246C>T
MANE Select: NM_031443
dbSNP: rs148244188
Type: single nucleotide variant
Location: chr7:45063959 (GRCh38)
Gene constraint: LOEUF 0.753 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 67.48 · 8 PDB
Residue 82: the pid domain

Full CCM2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: cerebral cavernous malformation 2

Similar variants

CCM2 c.289-1G>A Pathogenic/Likely pathogenic ★★ same condition
CCM2 c.30+1G>A Pathogenic ★★ same condition
CCM2 c.472+1G>C Pathogenic/Likely pathogenic ★★ same condition
CCM2 c.473-1G>T Pathogenic ★★ same condition
CCM2 c.745+1G>T Pathogenic ★★ same condition
CCM2 p.Arg19Ter Pathogenic ★★ same condition
CCM2 p.Arg57Ter Pathogenic/Likely pathogenic ★★ same condition
CCM2 p.Gln107Ter 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/ccm2-p-pro82 (accessed [today's date]).

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