Is ACD p.Ala209= (c.627C>A) pathogenic?

ACD p.Ala209= (c.627C>A) is classified Likely benign in ACD (ClinVar, Single submitter, 1 submitter; last evaluated 2023-07-10). Very rare (popmax 0.00127%, nfe); Associated with dyskeratosis congenita, autosomal dominant 6.

What condition is associated with ACD p.Ala209= (c.627C>A)?

ACD p.Ala209= (c.627C>A) is associated with dyskeratosis congenita, autosomal dominant 6 (ClinVar).

How common is ACD p.Ala209= (c.627C>A) in the general population?

ACD p.Ala209= (c.627C>A) is very rare (popmax 0.00127%, nfe) (gnomAD).

ACD p.Ala209=

c.627C>A · rs766962010 · VCV2887256

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00127%, nfe)

Conditions

dyskeratosis congenita, autosomal dominant 6

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1	GERP -1.9, phastCons 1
Overall
CADD	6.17	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00127% European (non-Finnish) · 15/1,179,956 alleles

Filtering AF 0.000763% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000605%

Overall 0.00103% 15/1,461,542 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: ACD
Protein: p.Ala209=
Coding: c.627C>A
MANE Select: NM_001082486
dbSNP: rs766962010
Type: single nucleotide variant
Location: chr16:67658946 (GRCh38)
Gene constraint: LOEUF 0.921 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 63.09 · 28 PDB
Residue 209: the 'interaction with pot1' region; an α-helix

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

Disease context

dyskeratosis congenita, autosomal dominant 6 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ACD p.Ala209Val Uncertain significance ★★ ⚠ same residue
ACD p.Ala209Pro Uncertain significance ★ ⚠ same residue
ACD c.645+2T>C Uncertain significance ★★ same condition
ACD c.99+5G>A Uncertain significance ★★ same condition
ACD c.-20C>T Uncertain significance ★★ same condition
ACD c.-24C>T Uncertain significance ★★ same condition
ACD c.-26T>G Uncertain significance ★★ same condition
ACD c.-29C>A 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/acd-p-ala209 (accessed [today's date]).

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