Is COPA p.Ser434Leu (c.1301C>T) pathogenic?

COPA p.Ser434Leu (c.1301C>T) is classified Uncertain significance in COPA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-23). AlphaMissense: likely benign (0.1962); Very rare (popmax 0.00878%, sas); Associated with autoimmune interstitial lung disease-arthritis syndrome.

What condition is associated with COPA p.Ser434Leu (c.1301C>T)?

COPA p.Ser434Leu (c.1301C>T) is associated with autoimmune interstitial lung disease-arthritis syndrome (ClinVar).

How common is COPA p.Ser434Leu (c.1301C>T) in the general population?

COPA p.Ser434Leu (c.1301C>T) is very rare (popmax 0.00878%, sas) (gnomAD).

What do computational predictors say about COPA p.Ser434Leu (c.1301C>T)?

AlphaMissense predicts likely benign (score 0.1962) — an in-silico prediction, not a clinical call.

COPA p.Ser434Leu

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.1301C>T · rs769707936 · VCV1386816

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1962 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00878%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

autoimmune interstitial lung disease-arthritis syndrome

Computational evidence

Protein change
AlphaMissense	0.1962	likely benign
REVEL	0.367	indeterminate
SaProt	LLR -8.07	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2.7, phastCons 1
Regional constraint	o/e 0.72	unconstrained · MANE · 42 kb · p 1.1e-24 · regional, not allelic
Overall
CADD	28.1	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 0.00878% South Asian · 8/91,072 alleles

Filtering AF 0.00437% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00312%

Overall 0.00164% 24/1,461,672 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00878%	11,384
Remaining individualsnot grpmax-eligible	0.0032%	31,254
East Asian	0.00223%	44,886
European (non-Finnish)	0.0011%	90,766

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.Ser434Leu
Coding: c.1301C>T
MANE Select: NM_004371
dbSNP: rs769707936
Type: single nucleotide variant
Location: chr1:160307164 (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.Ser434= Uncertain significance ★ 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-ser434leu (accessed [today's date]).

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