Is ADAR p.Ser878Pro (c.2632T>C) pathogenic?

ADAR p.Ser878Pro (c.2632T>C) is classified Uncertain significance in ADAR (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-02-16). AlphaMissense: likely benign (0.0665); Very rare (popmax 0.000508%, nfe); Associated with Aicardi-Goutieres syndrome 6.

What condition is associated with ADAR p.Ser878Pro (c.2632T>C)?

ADAR p.Ser878Pro (c.2632T>C) is associated with Aicardi-Goutieres syndrome 6, dyschromatosis symmetrica hereditaria (ClinVar).

How common is ADAR p.Ser878Pro (c.2632T>C) in the general population?

ADAR p.Ser878Pro (c.2632T>C) is very rare (popmax 0.000508%, nfe) (gnomAD).

How is Aicardi-Goutières syndrome inherited?

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

What do computational predictors say about ADAR p.Ser878Pro (c.2632T>C)?

AlphaMissense predicts likely benign (score 0.0665) — an in-silico prediction, not a clinical call.

ADAR p.Ser878Pro

c.2632T>C · rs1261780777 · VCV1396756

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.0665 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000508%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Aicardi-Goutieres syndrome 6

Computational evidence

Protein change
AlphaMissense	0.0665	likely benign
REVEL	0.023	moderately benign-leaning
SaProt	LLR -3.12	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 0.33	GERP -3.4, phastCons 0.82
Regional constraint	o/e 0.74	unconstrained · MANE · 17 kb · p 1.3e-17 · regional, not allelic
Overall
CADD	10.01	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 0.000508% European (non-Finnish) · 6/1,180,026 alleles

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

Overall 0.000372% 6/1,613,936 alleles · very rare

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: ADAR
Protein: p.Ser878Pro
Coding: c.2632T>C
MANE Select: NM_001111
dbSNP: rs1261780777
Type: single nucleotide variant
Location: chr1:154589793 (GRCh38)
Gene constraint: LOEUF 0.449 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 68.86 · 24 PDB
Residue 878: a β-strand

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

Disease context

Aicardi-Goutieres syndrome 6 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: dyschromatosis symmetrica hereditaria

For Aicardi-Goutières syndrome (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: Antenatal, Infancy, Neonatal
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

ADAR p.Ser878Ala Uncertain significance ★ ⚠ same residue
ADAR c.2885+1G>A Likely pathogenic ★★ same condition
ADAR p.Arg1078Cys Pathogenic ★★ same condition
ADAR p.Arg1096Ter Pathogenic/Likely pathogenic ★★ same condition
ADAR p.Arg328Ter Pathogenic ★★ same condition
ADAR p.Arg360Ter Pathogenic/Likely pathogenic ★★ same condition
ADAR p.Arg474Ter Pathogenic ★★ same condition
ADAR p.Gln559Ter 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/adar-p-ser878pro (accessed [today's date]).

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