Is BBC3 p.Thr52Ile (c.155C>T) pathogenic?

BBC3 p.Thr52Ile (c.155C>T) is classified Likely benign in BBC3 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-10-12). Absent from gnomAD v4.1.

How common is BBC3 p.Thr52Ile (c.155C>T) in the general population?

BBC3 p.Thr52Ile (c.155C>T) is absent from gnomAD v4.1 (gnomAD).

BBC3 p.Thr52Ile

c.155C>T · VCV3479894

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,217,200)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.033	moderately benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.8	GERP 3.7, phastCons 1
Regional constraint	o/e 0.83	unconstrained · MANE · 6,626 bp · p 0.0062 · regional, not allelic
Overall
CADD	22.7	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,217,200). 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: BBC3
Protein: p.Thr52Ile
Coding: c.155C>T
MANE Select: NM_014417
Type: single nucleotide variant
Location: chr19:47228277 (GRCh38)
Gene constraint: LOEUF 1.293 · pLI 0.05 (gnomAD)
Structure: AlphaFold pLDDT 47.60 · 13 PDB
Residue 52: the 'disordered' region

Full BBC3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BBC3 c.*23C>T Benign/Likely benign ★★ same type
BBC3 c.-3G>A Uncertain significance ★ ⚠ same type
BBC3 c.*16C>T Uncertain significance ★ ⚠ same type
BBC3 c.*46C>T Uncertain significance ★ ⚠ same type
BBC3 c.*57C>T Uncertain significance ★ ⚠ same type
BBC3 c.*64C>G Uncertain significance ★ ⚠ same type
BBC3 c.*76C>G Uncertain significance ★ ⚠ same type
BBC3 c.*79G>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/bbc3-p-thr52ile (accessed [today's date]).

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