Is G6PC3 p.Ser255= (c.765A>G) pathogenic?

G6PC3 p.Ser255= (c.765A>G) is classified Likely benign in G6PC3 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-01-13). No allele count reported in gnomAD v4.1 (AN 1,612,434); Associated with autosomal recessive severe congenital neutropenia due to G6PC3 deficiency.

What condition is associated with G6PC3 p.Ser255= (c.765A>G)?

G6PC3 p.Ser255= (c.765A>G) is associated with autosomal recessive severe congenital neutropenia due to G6PC3 deficiency (ClinVar).

How common is G6PC3 p.Ser255= (c.765A>G) in the general population?

G6PC3 p.Ser255= (c.765A>G) is no allele count reported in gnomAD v4.1 (AN 1,612,434) (gnomAD).

G6PC3 p.Ser255=

Q: How is Severe congenital neutropenia due to G6PC3 deficiency inherited?

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

c.765A>G · rs751895520 · VCV2815359

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,612,434)

Conditions

autosomal recessive severe congenital neutropenia due to G6PC3 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 -6.6	GERP -4.4
Overall
CADD	2.007	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,612,434). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: G6PC3
Protein: p.Ser255=
Coding: c.765A>G
MANE Select: NM_138387
dbSNP: rs751895520
Type: single nucleotide variant
Location: chr17:44075767 (GRCh38)
Gene constraint: LOEUF 1.008 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 92.79

Full G6PC3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

autosomal recessive severe congenital neutropenia due to G6PC3 deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Severe congenital neutropenia due to G6PC3 deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

G6PC3 p.Arg161Gln Pathogenic/Likely pathogenic ★★ same condition
G6PC3 p.Arg161Ter Pathogenic ★★ same condition
G6PC3 p.Arg189Ter Pathogenic ★★ same condition
G6PC3 p.Arg253His Pathogenic ★★ same condition
G6PC3 p.Gln277Ter Pathogenic ★★ same condition
G6PC3 p.Gly109Ser Likely pathogenic ★★ ⚠ same condition
G6PC3 p.Gly260Arg Pathogenic ★★ same condition
G6PC3 p.Pro44Leu 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/g6pc3-p-ser255 (accessed [today's date]).

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