Is BMP8B p.Pro262Ser (c.784C>T) pathogenic?

BMP8B p.Pro262Ser (c.784C>T) is classified Uncertain significance in BMP8B (ClinVar, Single submitter, 1 submitter; last evaluated 2023-10-13). AlphaMissense: likely benign (0.0991); Very rare (popmax 0.00161%, nfe).

How common is BMP8B p.Pro262Ser (c.784C>T) in the general population?

BMP8B p.Pro262Ser (c.784C>T) is very rare (popmax 0.00161%, nfe) (gnomAD).

What do computational predictors say about BMP8B p.Pro262Ser (c.784C>T)?

AlphaMissense predicts likely benign (score 0.0991) — an in-silico prediction, not a clinical call.

BMP8B p.Pro262Ser

c.784C>T · rs748998070 · VCV3134584

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0991 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00161%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0991	likely benign
REVEL	0.081	moderately benign-leaning
SaProt	LLR -7.29	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 4.2	GERP -3.4, phastCons 1
Regional constraint	o/e 0.00	constrained · MANE · 129 bp · p 1.7e-15 · regional, not allelic
Overall
CADD	13.07	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 0.00161% European (non-Finnish) · 19/1,179,776 alleles

Filtering AF 0.00103% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00083%

Overall 0.0013% 21/1,613,444 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00161%	62,093
Remaining individualsnot grpmax-eligible	0.0016%	62,454
Finnishnot grpmax-eligible	0.00156%	64,020

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.Pro262Ser
Coding: c.784C>T
MANE Select: NM_001720
dbSNP: rs748998070
Type: single nucleotide variant
Location: chr1:39764707 (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

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
BMP8B p.Ala361Thr 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-pro262ser (accessed [today's date]).

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