Is CHST3 p.Glu121= (c.363G>A) pathogenic?

CHST3 p.Glu121= (c.363G>A) is classified Likely benign in CHST3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-01-18). Absent from gnomAD v4.1; Associated with spondyloepiphyseal dysplasia with congenital joint dislocations.

What condition is associated with CHST3 p.Glu121= (c.363G>A)?

CHST3 p.Glu121= (c.363G>A) is associated with spondyloepiphyseal dysplasia with congenital joint dislocations (ClinVar).

How common is CHST3 p.Glu121= (c.363G>A) in the general population?

CHST3 p.Glu121= (c.363G>A) is absent from gnomAD v4.1 (gnomAD).

How is CHST3-related skeletal dysplasia inherited?

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

CHST3 p.Glu121=

c.363G>A · VCV3627073

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

spondyloepiphyseal dysplasia with congenital joint dislocations

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 1	GERP -0.58, phastCons 0.023
Overall
CADD	2.501	PHRED · no single calibrated threshold — expert panels disagree

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: CHST3
Protein: p.Glu121=
Coding: c.363G>A
MANE Select: NM_004273
Type: single nucleotide variant
Location: chr10:72007394 (GRCh38)
Gene constraint: LOEUF 1.119 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 80.58
Residue 121: the 'disordered' region

Full CHST3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

spondyloepiphyseal dysplasia with congenital joint dislocations — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For CHST3-related skeletal dysplasia (Orphanet):

Inheritance: Autosomal recessive
Onset: Antenatal, Neonatal

Similar variants

CHST3 p.Arg221Cys Pathogenic/Likely pathogenic ★★ same condition
CHST3 p.Glu230Ter Pathogenic/Likely pathogenic ★★ same condition
CHST3 p.Phe159Ile Pathogenic/Likely pathogenic ★★ same condition
CHST3 c.*57G>T Uncertain significance ★★ same condition
CHST3 c.*66G>T Uncertain significance ★★ same condition
CHST3 p.Ala106Thr Uncertain significance ★★ ⚠ same condition
CHST3 p.Ala129Glu Uncertain significance ★★ ⚠ same condition
CHST3 p.Ala182Thr 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/chst3-p-glu121 (accessed [today's date]).

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