Is CCDC63 p.Ala27Val (c.80C>T) pathogenic?

CCDC63 p.Ala27Val (c.80C>T) is classified Uncertain significance in CCDC63 (ClinVar, Single submitter, 2 submitters; last evaluated 2025-08-28). AlphaMissense: likely benign (0.1547); Rare (popmax 0.734%, afr).

How common is CCDC63 p.Ala27Val (c.80C>T) in the general population?

CCDC63 p.Ala27Val (c.80C>T) is rare (popmax 0.734%, afr) (gnomAD).

What do computational predictors say about CCDC63 p.Ala27Val (c.80C>T)?

AlphaMissense predicts likely benign (score 0.1547) — an in-silico prediction, not a clinical call.

CCDC63 p.Ala27Val

c.80C>T · VCV4221395

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1547 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.734%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1547	likely benign
REVEL	0.098	moderately benign-leaning
SaProt	LLR -7.74	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.068	GERP -4.5, phastCons 0.003
Regional constraint	o/e 0.92	unconstrained · MANE · 55 kb · p 0.045 · regional, not allelic
Overall
CADD	7.069	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.734% African / African-American · 551/75,036 alleles

Filtering AF 0.684% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.663%

Overall 0.038% 614/1,614,098 alleles · rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.734%	136
Remaining individualsnot grpmax-eligible	0.0368%	2,717
Admixed American	0.0333%	3,001
Middle Eastern	0.0165%	6,046
Finnishnot grpmax-eligible	0.00312%	32,012
East Asian	0.00223%	44,872
South Asian	0.0022%	45,537
European (non-Finnish)	0.00119%	84,286

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: CCDC63
Protein: p.Ala27Val
Coding: c.80C>T
MANE Select: NM_152591
Type: single nucleotide variant
Location: chr12:110853475 (GRCh38)
Gene constraint: LOEUF 1.051 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.75
Residue 27: the 'disordered' region

Full CCDC63 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CCDC63 p.Ala108Thr Uncertain significance ★ ⚠ same type
CCDC63 p.Ala144Val Uncertain significance ★ ⚠ same type
CCDC63 p.Ala280Val Uncertain significance ★ ⚠ same type
CCDC63 p.Arg148Trp Uncertain significance ★ ⚠ same type
CCDC63 p.Arg230Gln Uncertain significance ★ ⚠ same type
CCDC63 p.Arg237Cys Uncertain significance ★ ⚠ same type
CCDC63 p.Arg237His Uncertain significance ★ ⚠ same type
CCDC63 p.Arg250Gln Uncertain significance ★ ⚠ same type

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/ccdc63-p-ala27val (accessed [today's date]).

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