Is C2CD4D p.Ser148Pro (c.442T>C) pathogenic?

C2CD4D p.Ser148Pro (c.442T>C) is classified Uncertain significance in C2CD4D (ClinVar, Single submitter, 1 submitter; last evaluated 2024-08-12). AlphaMissense: likely benign (0.155); Absent from gnomAD v4.1.

How common is C2CD4D p.Ser148Pro (c.442T>C) in the general population?

C2CD4D p.Ser148Pro (c.442T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about C2CD4D p.Ser148Pro (c.442T>C)?

AlphaMissense predicts likely benign (score 0.155) — an in-silico prediction, not a clinical call.

C2CD4D p.Ser148Pro

c.442T>C · VCV3483566

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.155 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,323,256)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.155	likely benign
REVEL	0.041	moderately benign-leaning
SaProt	LLR -8.67	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 1.8	GERP -2.7, phastCons 1
Overall
CADD	23.0	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

No allele count reported in gnomAD v4.1 (AN 1,323,256). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: C2CD4D
Protein: p.Ser148Pro
Coding: c.442T>C
MANE Select: NM_001394591
Type: single nucleotide variant
Location: chr1:151838548 (GRCh38)
Gene constraint: LOEUF 1.931 · pLI 0.12 (gnomAD)
Structure: AlphaFold pLDDT 66.41
Residue 148: the 'disordered' region

Full C2CD4D gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

C2CD4D p.Ser148Leu Uncertain significance ★ ⚠ same residue
C2CD4D p.Ala120Val Uncertain significance ★ ⚠ same type
C2CD4D p.Ala301Gly Uncertain significance ★ ⚠ same type
C2CD4D p.Ala31Ser Uncertain significance ★ ⚠ same type
C2CD4D p.Ala38Pro Uncertain significance ★ ⚠ same type
C2CD4D p.Ala63Glu Uncertain significance ★ ⚠ same type
C2CD4D p.Ala78Thr Uncertain significance ★ ⚠ same type
C2CD4D p.Arg102Trp 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/c2cd4d-p-ser148pro (accessed [today's date]).

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