Is CSF2RA p.Asp300= (c.900C>T) pathogenic?

CSF2RA p.Asp300= (c.900C>T) is classified Likely benign in CSF2RA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-11-08). Ultra-rare (popmax 0.03%, amr); Associated with surfactant metabolism dysfunction, pulmonary, 4.

What condition is associated with CSF2RA p.Asp300= (c.900C>T)?

CSF2RA p.Asp300= (c.900C>T) is associated with surfactant metabolism dysfunction, pulmonary, 4 (ClinVar).

How common is CSF2RA p.Asp300= (c.900C>T) in the general population?

CSF2RA p.Asp300= (c.900C>T) is ultra-rare (popmax 0.03%, amr) (gnomAD).

How is Hereditary pulmonary alveolar proteinosis inherited?

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

CSF2RA p.Asp300=

c.900C>T · rs369124146 · VCV1089122

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.03%, amr)

Conditions

surfactant metabolism dysfunction, pulmonary, 4

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -6.9	GERP 1.3
Overall
CADD	0.348	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.03% Admixed American · 18/60,002 alleles

Filtering AF 0.0194% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.016%

Overall 0.00465% 75/1,613,938 alleles · ultra-rare exomes 64/1,461,650 · genomes 11/152,288 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.03%	3,333
Remaining individualsnot grpmax-eligible	0.0064%	15,623
South Asian	0.00439%	22,770
African / African-American	0.004%	25,008
European (non-Finnish)	0.0039%	25,649

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: CSF2RA
Protein: p.Asp300=
Coding: c.900C>T
MANE Select: NM_172245
dbSNP: rs369124146
Type: single nucleotide variant
Location: chrX:1300580 (GRCh38)
Structure: AlphaFold pLDDT 82.15 · 2 PDB
Residue 300: the fibronectin type-iii domain; a β-strand

Full CSF2RA gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

surfactant metabolism dysfunction, pulmonary, 4 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hereditary pulmonary alveolar proteinosis (Orphanet):

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

Similar variants

CSF2RA p.Arg199Ter Pathogenic ★★ same condition
CSF2RA p.Arg217Ter Pathogenic/Likely pathogenic ★★ same condition
CSF2RA p.Gln204Ter Pathogenic ★★ same condition
CSF2RA p.Gln263Ter Pathogenic/Likely pathogenic ★★ same condition
CSF2RA p.Arg354Gln Uncertain significance ★★ same condition
CSF2RA p.Gly339Val Uncertain significance ★★ same condition
CSF2RA p.Gly386Arg Uncertain significance ★★ same condition
CSF2RA p.Leu336Val 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/csf2ra-p-asp300 (accessed [today's date]).

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