Is C2CD4B p.Trp65Cys (c.195G>T) pathogenic?

C2CD4B p.Trp65Cys (c.195G>T) is classified Uncertain significance in C2CD4B (ClinVar, Single submitter, 1 submitter; last evaluated 2025-02-07). AlphaMissense: likely pathogenic (0.604); Very rare (popmax 0.000267%, nfe).

How common is C2CD4B p.Trp65Cys (c.195G>T) in the general population?

C2CD4B p.Trp65Cys (c.195G>T) is very rare (popmax 0.000267%, nfe) (gnomAD).

What do computational predictors say about C2CD4B p.Trp65Cys (c.195G>T)?

AlphaMissense predicts likely pathogenic (score 0.604) — an in-silico prediction, not a clinical call.

C2CD4B p.Trp65Cys

c.195G>T · VCV3826309

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.604 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000267%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.604	likely pathogenic · top 9% in C2CD4B
REVEL	0.138	moderately benign-leaning
SaProt	LLR -5.56	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.3	GERP 1.5, phastCons 1
Regional constraint	o/e 1.11	unconstrained · MANE · 1,091 bp · p 0.0058 · regional, not allelic
Overall
CADD	21.6	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 0.000267% European (non-Finnish) · 3/1,124,492 alleles

Filtering AF 7.1e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 2e-05%

Overall 0.000203% 3/1,475,952 alleles · very rare

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: C2CD4B
Protein: p.Trp65Cys
Coding: c.195G>T
MANE Select: NM_001007595
Type: single nucleotide variant
Location: chr15:62164790 (GRCh38)
Structure: AlphaFold pLDDT 60.81

Full C2CD4B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

C2CD4B p.Trp65Arg Uncertain significance ★ ⚠ same residue
C2CD4B p.Ala138Thr Uncertain significance ★ ⚠ same type
C2CD4B p.Ala190Gly Uncertain significance ★ ⚠ same type
C2CD4B p.Ala197Val Uncertain significance ★ ⚠ same type
C2CD4B p.Ala20Asp Uncertain significance ★ ⚠ same type
C2CD4B p.Ala231Pro Uncertain significance ★ ⚠ same type
C2CD4B p.Ala239Val Uncertain significance ★ ⚠ same type
C2CD4B p.Ala244Thr 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/c2cd4b-p-trp65cys (accessed [today's date]).

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