Is GUSB p.Ser503= (c.1509C>T) pathogenic?

GUSB p.Ser503= (c.1509C>T) is classified Likely benign in GUSB (ClinVar, Single submitter, 1 submitter; last evaluated 2022-05-04). Very rare (popmax 8.48e-05%, nfe); Associated with mucopolysaccharidosis type 7.

What condition is associated with GUSB p.Ser503= (c.1509C>T)?

GUSB p.Ser503= (c.1509C>T) is associated with mucopolysaccharidosis type 7 (ClinVar).

How common is GUSB p.Ser503= (c.1509C>T) in the general population?

GUSB p.Ser503= (c.1509C>T) is very rare (popmax 8.48e-05%, nfe) (gnomAD).

How is Mucopolysaccharidosis type 7 inherited?

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

GUSB p.Ser503=

c.1509C>T · rs2484765658 · VCV2133506

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 8.48e-05%, nfe)

Conditions

mucopolysaccharidosis type 7

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>C here scores Δ0.67 · evaluated, not missing
Constraint at this position
Conservation	phyloP 0.42	GERP -3.7, phastCons 0.95
Overall
CADD	4.494	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.48e-05% European (non-Finnish) · 1/1,179,838 alleles

Overall 6.89e-05% 1/1,451,130 alleles · very rare

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: GUSB
Protein: p.Ser503=
Coding: c.1509C>T
MANE Select: NM_000181
dbSNP: rs2484765658
Type: single nucleotide variant
Location: chr7:65967875 (GRCh38)
Gene constraint: LOEUF 0.871 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 94.35 · 2 PDB

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

Disease context

mucopolysaccharidosis type 7 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Mucopolysaccharidosis type 7 (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Antenatal, Childhood, Infancy, Neonatal
Prevalence: <1 / 1 000 000 (Europe)

Similar variants

GUSB c.1244+1G>A Pathogenic ★★ same condition
GUSB c.581+1G>A Pathogenic/Likely pathogenic ★★ same condition
GUSB c.724+1G>T Pathogenic/Likely pathogenic ★★ same condition
GUSB p.Ala619Val Pathogenic/Likely pathogenic ★★ same condition
GUSB p.Arg110Ter Pathogenic/Likely pathogenic ★★ same condition
GUSB p.Arg167Ter Pathogenic/Likely pathogenic ★★ same condition
GUSB p.Arg216Trp Pathogenic/Likely pathogenic ★★ same condition
GUSB p.Arg357Ter 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/gusb-p-ser503 (accessed [today's date]).

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