Is C2CD3 p.Asp1346Ala (c.4037A>C) pathogenic?

C2CD3 p.Asp1346Ala (c.4037A>C) is classified Benign/Likely benign in C2CD3 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-08). AlphaMissense: likely benign (0.0952); Low-frequency (popmax 1.16%, afr).

How common is C2CD3 p.Asp1346Ala (c.4037A>C) in the general population?

C2CD3 p.Asp1346Ala (c.4037A>C) is low-frequency (popmax 1.16%, afr) (gnomAD).

What do computational predictors say about C2CD3 p.Asp1346Ala (c.4037A>C)?

AlphaMissense predicts likely benign (score 0.0952) — an in-silico prediction, not a clinical call.

C2CD3 p.Asp1346Ala

c.4037A>C · rs78859901 · VCV720448

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely benign

0.0952 · ACMG-weighted

gnomAD v4.1

Rare

low-frequency (popmax 1.16%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0952	likely benign
REVEL	0.074	moderately benign-leaning
SaProt	LLR -6.59	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 4.2	GERP 1.6, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 157 kb · p 9.8e-06 · regional, not allelic
Overall
CADD	21.4	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 1.16% African / African-American · 866/74,866 alleles

Filtering AF 1.09% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.07%

Overall 0.0618% 996/1,611,442 alleles · low-frequency

Ancestry group	Frequency	1 in
African / African-Americangrpmax	1.16%	86
Middle Eastern	0.0994%	1,006
Remaining individualsnot grpmax-eligible	0.0898%	1,114
Admixed American	0.0891%	1,122
South Asian	0.00661%	15,126
European (non-Finnish)	0.000763%	130,986

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: C2CD3
Protein: p.Asp1346Ala
Coding: c.4037A>C
MANE Select: NM_001286577
dbSNP: rs78859901
Type: single nucleotide variant
Location: chr11:74078681 (GRCh38)
Gene constraint: LOEUF 0.637 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 55.65

Full C2CD3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

C2CD3 p.Asp1346Glu Uncertain significance ★★ ⚠ same residue
C2CD3 c.3911-2A>T Pathogenic/Likely pathogenic ★★ same type
C2CD3 p.Arg621Ter Pathogenic/Likely pathogenic ★★ same type
C2CD3 p.Arg666Ter Pathogenic ★★ same type
C2CD3 p.Arg768Ter Pathogenic/Likely pathogenic ★★ same type
C2CD3 p.Tyr173Ter Pathogenic/Likely pathogenic ★★ same type
C2CD3 c.2085+5G>A Uncertain significance ★★ same type
C2CD3 c.4951+6C>T 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/c2cd3-p-asp1346ala (accessed [today's date]).

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