Is ADAR p.Ser1170Phe (c.3509C>T) pathogenic?

ADAR p.Ser1170Phe (c.3509C>T) is classified Uncertain significance in ADAR (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-05-25). AlphaMissense: likely benign (0.2979); Very rare (popmax 0.000169%, nfe); Associated with dyschromatosis symmetrica hereditaria.

What condition is associated with ADAR p.Ser1170Phe (c.3509C>T)?

ADAR p.Ser1170Phe (c.3509C>T) is associated with dyschromatosis symmetrica hereditaria, Aicardi-Goutieres syndrome 6 (ClinVar).

How common is ADAR p.Ser1170Phe (c.3509C>T) in the general population?

ADAR p.Ser1170Phe (c.3509C>T) is very rare (popmax 0.000169%, nfe) (gnomAD).

How is Dyschromatosis symmetrica hereditaria inherited?

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

What do computational predictors say about ADAR p.Ser1170Phe (c.3509C>T)?

AlphaMissense predicts likely benign (score 0.2979) — an in-silico prediction, not a clinical call.

ADAR p.Ser1170Phe

c.3509C>T · rs1696650377 · VCV955661

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.2979 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000169%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

dyschromatosis symmetrica hereditaria

Computational evidence

Protein change
AlphaMissense	0.2979	likely benign
REVEL	0.471	indeterminate
SaProt	LLR -8.65	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	Δ0.20	acceptor gain · deltas
Constraint at this position
Conservation	phyloP 12	GERP 1.7, phastCons 1
Regional constraint	o/e 0.74	unconstrained · MANE · 17 kb · p 1.3e-17 · regional, not allelic
Overall
CADD	32.0	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 0.000169% European (non-Finnish) · 2/1,180,032 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000205% 3/1,461,876 alleles · very rare

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0016%	62,510
European (non-Finnish)grpmax	0.000169%	590,016

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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.Ser1170Phe
Coding: c.3509C>T
MANE Select: NM_001111
dbSNP: rs1696650377
Type: single nucleotide variant
Location: chr1:154584978 (GRCh38)
Gene constraint: LOEUF 0.449 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 68.86 · 24 PDB
Residue 1170: an α-helix; the a to i editase domain

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

Disease context

dyschromatosis symmetrica hereditaria — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Aicardi-Goutieres syndrome 6

For Dyschromatosis symmetrica hereditaria (Orphanet):

Inheritance: Autosomal dominant
Onset: Childhood

Similar variants

ADAR p.Ser1170= 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-ser1170phe (accessed [today's date]).

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