Is COPA p.Cys129Arg (c.385T>C) pathogenic?

COPA p.Cys129Arg (c.385T>C) is classified Uncertain significance in COPA (ClinVar, Single submitter, 1 submitter; last evaluated 2020-02-06). AlphaMissense: likely pathogenic (0.9818); Very rare (popmax 8.49e-05%, nfe); Associated with autoimmune interstitial lung disease-arthritis syndrome.

What condition is associated with COPA p.Cys129Arg (c.385T>C)?

COPA p.Cys129Arg (c.385T>C) is associated with autoimmune interstitial lung disease-arthritis syndrome (ClinVar).

How common is COPA p.Cys129Arg (c.385T>C) in the general population?

COPA p.Cys129Arg (c.385T>C) is very rare (popmax 8.49e-05%, nfe) (gnomAD).

What do computational predictors say about COPA p.Cys129Arg (c.385T>C)?

AlphaMissense predicts likely pathogenic (score 0.9818) — an in-silico prediction, not a clinical call.

COPA p.Cys129Arg

Q: How is Autoimmune interstitial lung disease-arthritis syndrome inherited?

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

c.385T>C · rs1647631957 · VCV1043811

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9818 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.49e-05%, nfe)

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

autoimmune interstitial lung disease-arthritis syndrome

Computational evidence

Protein change
AlphaMissense	0.9818	likely pathogenic
REVEL	0.695	pathogenic-leaning
SaProt	LLR -9.20	tolerated
⇒ AlphaMissense and REVEL call this damaging; SaProt does not.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · A>T here scores Δ0.29 · evaluated, not missing
Constraint at this position
Conservation	phyloP 11	GERP 2.6, phastCons 1
Regional constraint	o/e 0.48	unconstrained · MANE · 11 kb · p 2.2e-12 · regional, not allelic
Overall
CADD	32.0	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

Grpmax group 8.49e-05% European (non-Finnish) · 1/1,178,028 alleles

Overall 6.85e-05% 1/1,458,986 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: COPA
Protein: p.Cys129Arg
Coding: c.385T>C
MANE Select: NM_004371
dbSNP: rs1647631957
Type: single nucleotide variant
Location: chr1:160333604 (GRCh38)
Gene constraint: LOEUF 0.098 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 83.85 · 3 PDB
Residue 129: a β-strand

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

Disease context

autoimmune interstitial lung disease-arthritis syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autoimmune interstitial lung disease-arthritis syndrome (Orphanet):

Inheritance: Autosomal dominant
Onset: Childhood, Infancy

Similar variants

COPA p.Arg233His Pathogenic/Likely pathogenic ★★ same condition
COPA p.Glu241Lys Pathogenic ★★ same condition
COPA p.Ala111Thr Uncertain significance ★★ ⚠ same condition
COPA p.Ala176Val Uncertain significance ★★ ⚠ same condition
COPA p.Ala407Val Uncertain significance ★★ ⚠ same condition
COPA p.Ala422Thr Uncertain significance ★★ ⚠ same condition
COPA p.Ala469Val Uncertain significance ★★ ⚠ same condition
COPA p.Ala510Thr 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/copa-p-cys129arg (accessed [today's date]).

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