Is ABCA3 p.Pro186Leu (c.557C>T) pathogenic?

ABCA3 p.Pro186Leu (c.557C>T) is classified Likely pathogenic in ABCA3 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-07-10). AlphaMissense: likely pathogenic (0.6025); Very rare (popmax 0.00333%, amr); Associated with interstitial lung disease due to ABCA3 deficiency.

What condition is associated with ABCA3 p.Pro186Leu (c.557C>T)?

ABCA3 p.Pro186Leu (c.557C>T) is associated with interstitial lung disease due to ABCA3 deficiency, hereditary pulmonary alveolar proteinosis (ClinVar).

How common is ABCA3 p.Pro186Leu (c.557C>T) in the general population?

ABCA3 p.Pro186Leu (c.557C>T) is very rare (popmax 0.00333%, amr) (gnomAD).

What do computational predictors say about ABCA3 p.Pro186Leu (c.557C>T)?

AlphaMissense predicts likely pathogenic (score 0.6025) — an in-silico prediction, not a clinical call.

ABCA3 p.Pro186Leu

Q: How is Interstitial lung disease due to ABCA3 deficiency inherited?

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

c.557C>T · rs1297025959 · VCV1748408

Likely pathogenic Multiple submitters

Classification

Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely pathogenic

0.6025 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00333%, amr)

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

interstitial lung disease due to ABCA3 deficiency

Computational evidence

Protein change
AlphaMissense	0.6025	likely pathogenic ✓ concordant with ClinVar
REVEL	0.699	pathogenic-leaning
SaProt	LLR -6.01	tolerated
⇒ AlphaMissense and REVEL call this damaging; SaProt does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.9, phastCons 1
Regional constraint	o/e 0.98	unconstrained · MANE · 40 kb · p 0.47 · regional, not allelic
Overall
CADD	25.6	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 0.00333% Admixed American · 2/60,008 alleles

Filtering AF 0.000553% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000207%

Overall 0.00041% 6/1,461,866 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00333%	30,004
European (non-Finnish)	0.000339%	295,007

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.Pro186Leu
Coding: c.557C>T
MANE Select: NM_001089
dbSNP: rs1297025959
Type: single nucleotide variant
Location: chr16:2323579 (GRCh38)
Gene constraint: LOEUF 0.612 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.00 · 2 PDB

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

Disease context

interstitial lung disease due to ABCA3 deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary pulmonary alveolar proteinosis

For Interstitial lung disease due to ABCA3 deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood, Infancy, Neonatal

Similar variants

ABCA3 p.Pro186= Likely benign ★ same residue
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

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-pro186leu (accessed [today's date]).

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