Is BMP8B p.Pro27Ser (c.79C>T) pathogenic?

BMP8B p.Pro27Ser (c.79C>T) is classified Uncertain significance in BMP8B (ClinVar, Single submitter, 1 submitter; last evaluated 2025-04-12). AlphaMissense: likely benign (0.0774); Very rare (popmax 0.00433%, sas).

How common is BMP8B p.Pro27Ser (c.79C>T) in the general population?

BMP8B p.Pro27Ser (c.79C>T) is very rare (popmax 0.00433%, sas) (gnomAD).

What do computational predictors say about BMP8B p.Pro27Ser (c.79C>T)?

AlphaMissense predicts likely benign (score 0.0774) — an in-silico prediction, not a clinical call.

BMP8B p.Pro27Ser

c.79C>T · VCV3991994

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0774 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00433%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0774	likely benign
REVEL	0.047	moderately benign-leaning
SaProt	LLR -7.18	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 -2.4, phastCons 0.16
Regional constraint	o/e 0.76	unconstrained · MANE · 173 bp · p 0.046 · regional, not allelic
Overall
CADD	13.29	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 0.00433% South Asian · 1/23,108 alleles

Overall 0.000217% 2/919,642 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00433%	23,108
European (non-Finnish)	0.000113%	884,713

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: BMP8B
Protein: p.Pro27Ser
Coding: c.79C>T
MANE Select: NM_001720
Type: single nucleotide variant
Location: chr1:39788407 (GRCh38)
Gene constraint: LOEUF 1.297 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 76.96

Full BMP8B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

OXCT2 p.Gly27Val Uncertain significance ★ ⚠ same residue
BMP8B c.1059+579A>G Benign/Likely benign ★★ same type
BMP8B p.Leu118= Likely benign ★★ same type
BMP8B p.Ser276Thr Benign ★★ same type
BMP8B p.Ser326= Benign/Likely benign ★★ same type
BMP8B c.673+3659A>G Conflicting classifications of pathogenicity ★ ⚠ same type
BMP8B p.Ala344Val Uncertain significance ★ ⚠ same type
BMP8B p.Ala348Thr 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/bmp8b-p-pro27ser (accessed [today's date]).

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