Is SIN3A p.Pro212Ala (c.634C>G) pathogenic?

SIN3A p.Pro212Ala (c.634C>G) is classified Uncertain significance in SIN3A (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-19). AlphaMissense: likely benign (0.0774); Absent from gnomAD v4.1.

How common is SIN3A p.Pro212Ala (c.634C>G) in the general population?

SIN3A p.Pro212Ala (c.634C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about SIN3A p.Pro212Ala (c.634C>G)?

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

SIN3A p.Pro212Ala

c.634C>G · rs139541749 · VCV2130642

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0774 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0774	likely benign
REVEL	0.127	moderately benign-leaning
SaProt	LLR -7.52	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 12	GERP 2, phastCons 1
Regional constraint	o/e 0.83	unconstrained · MANE · 1,340 bp · p 0.042 · regional, not allelic
Overall
CADD	24.6	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: SIN3A
Protein: p.Pro212Ala
Coding: c.634C>G
MANE Select: NM_001145358
dbSNP: rs139541749
Type: single nucleotide variant
Location: chr15:75412885 (GRCh38)
Gene constraint: LOEUF 0.14 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 69.67
Residue 212: the 'interaction with rest' region; the 'disordered' region

Full SIN3A gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

SIN3A p.Pro212Leu Uncertain significance ★★ ⚠ same residue
SIN3A p.Arg1140Ter Pathogenic ★★ same type
SIN3A p.Arg471Ter Pathogenic ★★ same type
SIN3A p.Arg537Ter Pathogenic ★★ same type
SIN3A p.Arg553Ter Pathogenic/Likely pathogenic ★★ same type
SIN3A p.Arg559Ter Pathogenic/Likely pathogenic ★★ same type
SIN3A p.Arg718Ter Pathogenic/Likely pathogenic ★★ same type
SIN3A p.Arg897Ter Pathogenic ★★ 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/sin3a-p-pro212ala (accessed [today's date]).

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