Is ABCA3 p.Arg288Lys (c.863G>A) pathogenic?

ABCA3 p.Arg288Lys (c.863G>A) is classified Conflicting classifications of pathogenicity in ABCA3 (ClinVar, Conflicting submitters, 10 submitters; last evaluated 2026-02-04). AlphaMissense: likely benign (0.0618); Rare (popmax 0.846%, nfe); Associated with hereditary pulmonary alveolar proteinosis.

What condition is associated with ABCA3 p.Arg288Lys (c.863G>A)?

ABCA3 p.Arg288Lys (c.863G>A) is associated with hereditary pulmonary alveolar proteinosis, interstitial lung disease due to ABCA3 deficiency (ClinVar).

How common is ABCA3 p.Arg288Lys (c.863G>A) in the general population?

ABCA3 p.Arg288Lys (c.863G>A) is rare (popmax 0.846%, nfe) (gnomAD).

How is Hereditary pulmonary alveolar proteinosis inherited?

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

What do computational predictors say about ABCA3 p.Arg288Lys (c.863G>A)?

AlphaMissense predicts likely benign (score 0.0618) — an in-silico prediction, not a clinical call.

ABCA3 p.Arg288Lys

c.863G>A · rs117603931 · VCV227155

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 10 submitters

AlphaMissense

likely benign

0.0618 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.846%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

hereditary pulmonary alveolar proteinosis

Computational evidence

Protein change
AlphaMissense	0.0618	likely benign
REVEL	0.473	indeterminate
SaProt	LLR -6.12	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 -1.8	GERP -5.4
Regional constraint	o/e 0.98	unconstrained · MANE · 40 kb · p 0.47 · regional, not allelic
Overall
CADD	0.617	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 0.846% European (non-Finnish) · 9,983/1,179,978 alleles

Filtering AF 0.832% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.826%

Overall 0.703% 11,334/1,612,206 alleles · rare exomes 10,373/1,459,942 · genomes 961/152,264 · joint denominator

Ancestry group	Frequency	1 in
Ashkenazi Jewishnot grpmax-eligible	1.04%	96
European (non-Finnish)grpmax	0.846%	118
Remaining individualsnot grpmax-eligible	0.599%	167
Finnishnot grpmax-eligible	0.525%	191
Admixed American	0.283%	353
African / African-American	0.145%	688
South Asian	0.0692%	1,446
Middle Eastern	0.0165%	6,062

Ashkenazi Jewish 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: ABCA3
Protein: p.Arg288Lys
Coding: c.863G>A
MANE Select: NM_001089
dbSNP: rs117603931
Type: single nucleotide variant
Location: chr16:2319591 (GRCh38)
Gene constraint: LOEUF 0.612 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.00 · 2 PDB
Residue 288: a UniProt-annotated variant site (in smdp3; uncertain significance; does not affect protein oligomerization)

Full ABCA3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary pulmonary alveolar proteinosis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: interstitial lung disease due to ABCA3 deficiency

For Hereditary pulmonary alveolar proteinosis (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Childhood, Elderly, Infancy
Prevalence: <1 / 1 000 000 (Worldwide)

Similar variants

ABCA3 c.1112-20G>A Likely pathogenic ★★ same condition
ABCA3 c.2053-1G>C Likely pathogenic ★★ same condition
ABCA3 c.2414+1G>A Likely pathogenic ★★ same condition
ABCA3 c.3863-98C>T Pathogenic ★★ same condition
ABCA3 c.614-2A>G Likely pathogenic ★★ same condition
ABCA3 p.Ala1070Thr Likely pathogenic ★★ ⚠ same condition
ABCA3 p.Arg1550Trp Likely pathogenic ★★ same condition
ABCA3 p.Arg155Trp Likely pathogenic ★★ 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/abca3-p-arg288lys (accessed [today's date]).

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