Is BOC p.Ser270Thr (c.809G>C) pathogenic?

BOC p.Ser270Thr (c.809G>C) is classified Uncertain significance in BOC (ClinVar, Single submitter, 1 submitter; last evaluated 2021-12-07). AlphaMissense: likely benign (0.1096); Very rare (popmax 0.00267%, afr).

How common is BOC p.Ser270Thr (c.809G>C) in the general population?

BOC p.Ser270Thr (c.809G>C) is very rare (popmax 0.00267%, afr) (gnomAD).

What do computational predictors say about BOC p.Ser270Thr (c.809G>C)?

AlphaMissense predicts likely benign (score 0.1096) — an in-silico prediction, not a clinical call.

BOC p.Ser270Thr

c.809G>C · rs758565661 · VCV2395148

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1096 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1096	likely benign
REVEL	0.04	moderately benign-leaning
SaProt	LLR -7.99	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 6	GERP 0.41, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 37 kb · p 1.8e-07 · regional, not allelic
Overall
CADD	20.8	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 0.00267% African / African-American · 2/74,896 alleles

Filtering AF 0.000443% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.00131% 2/152,124 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: BOC
Protein: p.Ser270Thr
Coding: c.809G>C
MANE Select: NM_001378074
dbSNP: rs758565661
Type: single nucleotide variant
Location: chr3:113272551 (GRCh38)
Gene constraint: LOEUF 0.789 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 63.98 · 3 PDB
Residue 270: a disulfide bond; the ig-like c2-type 3 domain

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

Similar variants

BOC p.Ala715= Benign ★★ same type
BOC p.Lys884Asn Benign ★★ ⚠ same type
BOC p.Pro829Arg Benign ★★ ⚠ same type
BOC p.Pro913Ser Benign ★★ same type
BOC p.Ala226Thr Uncertain significance ★ ⚠ same type
BOC p.Ala424Thr Uncertain significance ★ ⚠ same type
BOC p.Ala470Val Uncertain significance ★ ⚠ same type
BOC p.Ala503Val 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/boc-p-ser270thr (accessed [today's date]).

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