Is BMPR1A p.Pro2Ser (c.4C>T) pathogenic?

BMPR1A p.Pro2Ser (c.4C>T) is classified Uncertain significance in BMPR1A (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-12-10). AlphaMissense: likely benign (0.0804); No allele count reported in gnomAD v4.1 (AN 1,604,012); Associated with polyposis syndrome, hereditary mixed, 2.

What condition is associated with BMPR1A p.Pro2Ser (c.4C>T)?

BMPR1A p.Pro2Ser (c.4C>T) is associated with polyposis syndrome, hereditary mixed, 2, hereditary neoplastic syndrome, juvenile polyposis syndrome (ClinVar).

How common is BMPR1A p.Pro2Ser (c.4C>T) in the general population?

BMPR1A p.Pro2Ser (c.4C>T) is no allele count reported in gnomAD v4.1 (AN 1,604,012) (gnomAD).

How is Hereditary mixed polyposis syndrome inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about BMPR1A p.Pro2Ser (c.4C>T)?

AlphaMissense predicts likely benign (score 0.0804) — an in-silico prediction, not a clinical call.

BMPR1A p.Pro2Ser

c.4C>T · rs11528010 · VCV941110

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely benign

0.0804 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,604,012)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

polyposis syndrome, hereditary mixed, 2

Computational evidence

Protein change
AlphaMissense	0.0804	likely benign
REVEL	0.238	benign-leaning
SaProt	LLR -5.65	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 7.8	GERP 1.3, phastCons 1
Regional constraint	o/e 0.82	unconstrained · MANE · 14 kb · p 0.1 · regional, not allelic
Overall
CADD	16.97	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 1,604,012). 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: BMPR1A
Protein: p.Pro2Ser
Coding: c.4C>T
MANE Select: NM_004329
dbSNP: rs11528010
Type: single nucleotide variant
Location: chr10:86876022 (GRCh38)
Gene constraint: LOEUF 0.195 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 82.86 · 11 PDB
Residue 2: a UniProt-annotated variant site (in)

Full BMPR1A gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

polyposis syndrome, hereditary mixed, 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary neoplastic syndrome juvenile polyposis syndrome

For Hereditary mixed polyposis syndrome (Orphanet):

Inheritance: Autosomal dominant
Onset: Childhood

Similar variants

BMPR1A p.Pro2Arg Uncertain significance ★★ ⚠ same residue
BMPR1A p.Pro2Thr Benign/Likely benign ★★ same residue
BMPR1A p.Pro2Leu Conflicting classifications of pathogenicity ★ ⚠ same residue
BMPR1A p.Pro2delinsThrGlnLeuTyrIleTyrIleArgSerPheThrArgLysSerHisTer Pathogenic ★ same residue
BMPR1A c.1166+1G>A Likely pathogenic ★★ same condition
BMPR1A c.1343-2A>G Likely pathogenic ★★ same condition
BMPR1A c.1473+1G>A Pathogenic/Likely pathogenic ★★ same condition
BMPR1A c.1473+1G>C Pathogenic/Likely pathogenic ★★ same condition

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/bmpr1a-p-pro2ser (accessed [today's date]).

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