Is ACD p.Arg68Leu (c.203G>T) pathogenic?

ACD p.Arg68Leu (c.203G>T) is classified Uncertain significance in ACD (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-06-08). AlphaMissense: ambiguous (0.3558); Absent from gnomAD v4.1; Associated with dyskeratosis congenita, autosomal dominant 6.

What condition is associated with ACD p.Arg68Leu (c.203G>T)?

ACD p.Arg68Leu (c.203G>T) is associated with dyskeratosis congenita, autosomal dominant 6 (ClinVar).

How common is ACD p.Arg68Leu (c.203G>T) in the general population?

ACD p.Arg68Leu (c.203G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ACD p.Arg68Leu (c.203G>T)?

AlphaMissense predicts ambiguous (score 0.3558) — an in-silico prediction, not a clinical call.

ACD p.Arg68Leu

c.203G>T · rs2543610163 · VCV1741954

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.3558 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

dyskeratosis congenita, autosomal dominant 6

Computational evidence

Protein change
AlphaMissense	0.3558	ambiguous
REVEL	0.257	benign-leaning
SaProt	LLR -7.17	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 3.9	GERP 1.4, phastCons 1
Regional constraint	o/e 0.89	unconstrained · MANE · 2,611 bp · p 0.011 · regional, not allelic
Overall
CADD	28.4	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

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: ACD
Protein: p.Arg68Leu
Coding: c.203G>T
MANE Select: NM_001082486
dbSNP: rs2543610163
Type: single nucleotide variant
Location: chr16:67659942 (GRCh38)
Gene constraint: LOEUF 0.921 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 63.09 · 28 PDB
Residue 68: a β-strand

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.Ala68Val Uncertain significance ★ same residue
ACD p.Arg68Gly Uncertain significance ★ ⚠ same residue
ACD p.Ala68= Likely benign ★ 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

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-arg68leu (accessed [today's date]).

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