Is SAMD9 p.Pro1477Ser (c.4429C>T) pathogenic?

SAMD9 p.Pro1477Ser (c.4429C>T) is classified Uncertain significance in SAMD9 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-01-09). AlphaMissense: ambiguous (0.4886); Very rare (popmax 0.000509%, nfe); Associated with Inborn genetic diseases.

What condition is associated with SAMD9 p.Pro1477Ser (c.4429C>T)?

SAMD9 p.Pro1477Ser (c.4429C>T) is associated with Inborn genetic diseases (ClinVar).

How common is SAMD9 p.Pro1477Ser (c.4429C>T) in the general population?

SAMD9 p.Pro1477Ser (c.4429C>T) is very rare (popmax 0.000509%, nfe) (gnomAD).

What do computational predictors say about SAMD9 p.Pro1477Ser (c.4429C>T)?

AlphaMissense predicts ambiguous (score 0.4886) — an in-silico prediction, not a clinical call.

SAMD9 p.Pro1477Ser

c.4429C>T · rs1029597437 · VCV2573985

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.4886 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000509%, nfe)

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.4886	ambiguous
REVEL	0.104	moderately benign-leaning
SaProt	LLR -7.43	tolerated
⇒ REVEL and SaProt both call this tolerated; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.9	GERP -2.1, phastCons 1
Regional constraint	o/e 0.84	unconstrained · MANE · 2,122 bp · p 6.9e-06 · regional, not allelic
Overall
CADD	21.0	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000509% European (non-Finnish) · 6/1,179,674 alleles

Filtering AF 0.000183% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00012%

Overall 0.000372% 6/1,613,478 alleles · very rare exomes 5/1,461,506 · genomes 1/151,972 · joint denominator

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: SAMD9
Protein: p.Pro1477Ser
Coding: c.4429C>T
MANE Select: NM_017654
dbSNP: rs1029597437
Type: single nucleotide variant
Location: chr7:93101669 (GRCh38)
Gene constraint: LOEUF 1.773 · pLI 0.03 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 83.79 · 10 PDB

Full SAMD9 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

SAMD9 p.Ala1057Val Uncertain significance ★★ ⚠ same condition
SAMD9 p.Ala1066Thr Uncertain significance ★★ ⚠ same condition
SAMD9 p.Ala1069Thr Uncertain significance ★★ ⚠ same condition
SAMD9 p.Ala1082Gly Uncertain significance ★★ ⚠ same condition
SAMD9 p.Ala1102Asp Uncertain significance ★★ ⚠ same condition
SAMD9 p.Ala1195Asp Uncertain significance ★★ ⚠ same condition
SAMD9 p.Ala123Ser Uncertain significance ★★ ⚠ same condition
SAMD9 p.Ala1290Val Uncertain significance ★★ ⚠ 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/samd9-p-pro1477ser (accessed [today's date]).

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