Is CSF3R p.Pro255= (c.765A>T) pathogenic?

CSF3R p.Pro255= (c.765A>T) is classified Likely benign in CSF3R (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-10-06). Ultra-rare (popmax 0.0639%, afr); Associated with autosomal recessive severe congenital neutropenia due to CSF3R deficiency.

What condition is associated with CSF3R p.Pro255= (c.765A>T)?

CSF3R p.Pro255= (c.765A>T) is associated with autosomal recessive severe congenital neutropenia due to CSF3R deficiency (ClinVar).

How common is CSF3R p.Pro255= (c.765A>T) in the general population?

CSF3R p.Pro255= (c.765A>T) is ultra-rare (popmax 0.0639%, afr) (gnomAD).

CSF3R p.Pro255=

Q: How is Autosomal recessive severe congenital neutropenia due to CSF3R deficiency inherited?

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

c.765A>T · rs145439244 · VCV1154602

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0639%, afr)

Conditions

autosomal recessive severe congenital neutropenia due to CSF3R deficiency

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 -2.9
Overall
CADD	0.663	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0639% African / African-American · 48/75,060 alleles

Filtering AF 0.0495% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0444%

Overall 0.00328% 53/1,614,084 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0639%	1,564
Admixed American	0.005%	20,007
Remaining individualsnot grpmax-eligible	0.0032%	31,254

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: CSF3R
Protein: p.Pro255=
Coding: c.765A>T
MANE Select: NM_000760
dbSNP: rs145439244
Type: single nucleotide variant
Location: chr1:36472595 (GRCh38)
Gene constraint: LOEUF 0.726 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 74.29 · 1 PDB
Residue 255: a disulfide bond; the fibronectin type-iii 2 domain

Full CSF3R gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

autosomal recessive severe congenital neutropenia due to CSF3R deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal recessive severe congenital neutropenia due to CSF3R deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

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CSF3R c.998-2A>T Likely pathogenic ★★ same condition
CSF3R p.Arg308Cys Pathogenic/Likely pathogenic ★★ ⚠ same condition
CSF3R p.Arg440Ter Pathogenic ★★ same condition
CSF3R p.Gln114Ter Pathogenic/Likely pathogenic ★★ same condition
CSF3R p.Thr618Ile Pathogenic/Likely pathogenic ★★ same condition
CSF3R p.Trp547Ter Pathogenic/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/csf3r-p-pro255 (accessed [today's date]).

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