Is GLA p.Cys56Ser (c.167G>C) pathogenic?

GLA p.Cys56Ser (c.167G>C) is classified Pathogenic in GLA (ClinVar, Single submitter, 1 submitter; last evaluated 2026-09-08). AlphaMissense: likely pathogenic (0.9024); Absent from gnomAD v4.1; Associated with Fabry disease.

What condition is associated with GLA p.Cys56Ser (c.167G>C)?

GLA p.Cys56Ser (c.167G>C) is associated with Fabry disease (ClinVar).

How common is GLA p.Cys56Ser (c.167G>C) in the general population?

GLA p.Cys56Ser (c.167G>C) is absent from gnomAD v4.1 (gnomAD).

How is Fabry disease inherited?

Typically X-linked dominant, X-linked recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about GLA p.Cys56Ser (c.167G>C)?

AlphaMissense predicts likely pathogenic (score 0.9024) — an in-silico prediction, not a clinical call.

GLA p.Cys56Ser

c.167G>C · VCV4087687

Pathogenic Single submitter

Classification

Pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9024 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Fabry disease

Computational evidence

Protein change
AlphaMissense	0.9024	likely pathogenic ✓ concordant with ClinVar · top 9% in GLA
REVEL	0.937	strongly pathogenic-leaning
SaProt	LLR -14.34	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 3.2, phastCons 1
Regional constraint	o/e 0.25	constrained · MANE · 3,899 bp · p 4.8e-07 · regional, not allelic
Overall
CADD	27.8	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: GLA
Protein: p.Cys56Ser
Coding: c.167G>C
MANE Select: NM_000169
Type: single nucleotide variant
Location: chrX:101407737 (GRCh38)
Structure: AlphaFold pLDDT 94.45 · 31 PDB
Residue 56: a turn; a UniProt-annotated variant site (in fabryd); a UniProt-annotated variant site (in fabryd; loss of enzyme activity); a disulfide bond

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

Disease context

Fabry disease — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Fabry disease (Orphanet):

Inheritance: X-linked dominant, X-linked recessive
Onset: Adolescent, Adult, Childhood
Prevalence: 1-9 / 1 000 000 (Worldwide)

Similar variants

GLA p.Cys56Tyr Pathogenic ★★ same residue
GLA p.Cys56Arg Likely pathogenic ★ same residue
GLA p.Cys56Gly Pathogenic ★ same residue
GLA p.Cys56Ter Pathogenic ★ same residue
GLA p.Cys56Trp Likely pathogenic ★ same residue
GLA p.Cys56Phe Conflicting classifications of pathogenicity ★ ⚠ same residue
GLA p.Cys56_Glu58delinsTer Pathogenic ★ same residue
GLA c.1000-10G>A 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/gla-p-cys56ser (accessed [today's date]).

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