Is COPA p.Arg1174Gln (c.3521G>A) pathogenic?

COPA p.Arg1174Gln (c.3521G>A) is classified Uncertain significance in COPA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-11). AlphaMissense: likely benign (0.0687); Very rare (popmax 0.00458%, nfe); Associated with autoimmune interstitial lung disease-arthritis syndrome.

What condition is associated with COPA p.Arg1174Gln (c.3521G>A)?

COPA p.Arg1174Gln (c.3521G>A) is associated with autoimmune interstitial lung disease-arthritis syndrome (ClinVar).

How common is COPA p.Arg1174Gln (c.3521G>A) in the general population?

COPA p.Arg1174Gln (c.3521G>A) is very rare (popmax 0.00458%, nfe) (gnomAD).

What do computational predictors say about COPA p.Arg1174Gln (c.3521G>A)?

AlphaMissense predicts likely benign (score 0.0687) — an in-silico prediction, not a clinical call.

COPA p.Arg1174Gln

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.3521G>A · rs772329332 · VCV1384412

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0687 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00458%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

autoimmune interstitial lung disease-arthritis syndrome

Computational evidence

Protein change
AlphaMissense	0.0687	likely benign
REVEL	0.115	moderately benign-leaning
SaProt	LLR -4.67	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 4.1	GERP 1.9, phastCons 1
Regional constraint	o/e 0.72	unconstrained · MANE · 42 kb · p 1.1e-24 · regional, not allelic
Overall
CADD	22.8	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 0.00458% European (non-Finnish) · 54/1,180,024 alleles

Filtering AF 0.00358% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00321%

Overall 0.00353% 57/1,613,968 alleles · very rare

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0048%	20,827
European (non-Finnish)grpmax	0.00458%	21,852

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: COPA
Protein: p.Arg1174Gln
Coding: c.3521G>A
MANE Select: NM_004371
dbSNP: rs772329332
Type: single nucleotide variant
Location: chr1:160290586 (GRCh38)
Gene constraint: LOEUF 0.098 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 83.85 · 3 PDB

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.Arg1174Trp Benign ★ ⚠ same residue
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

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-arg1174gln (accessed [today's date]).

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