Is SGCA p.Asp144= (c.432T>C) pathogenic?

SGCA p.Asp144= (c.432T>C) is classified Likely benign in SGCA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-28). Very rare (popmax 0.000171%, nfe); Associated with autosomal recessive limb-girdle muscular dystrophy type 2D.

What condition is associated with SGCA p.Asp144= (c.432T>C)?

SGCA p.Asp144= (c.432T>C) is associated with autosomal recessive limb-girdle muscular dystrophy type 2D (ClinVar).

How common is SGCA p.Asp144= (c.432T>C) in the general population?

SGCA p.Asp144= (c.432T>C) is very rare (popmax 0.000171%, nfe) (gnomAD).

SGCA p.Asp144=

Q: How is Alpha-sarcoglycan-related limb-girdle muscular dystrophy R3 inherited?

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

c.432T>C · rs774960107 · VCV1108908

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.000171%, nfe)

Conditions

autosomal recessive limb-girdle muscular dystrophy type 2D

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -6.9	GERP -2.8
Overall
CADD	0.946	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000171% European (non-Finnish) · 2/1,169,184 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000126% 2/1,591,530 alleles · very rare exomes 0/1,439,404 · genomes 2/152,126 · joint denominator

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: SGCA
Protein: p.Asp144=
Coding: c.432T>C
MANE Select: NM_000023
dbSNP: rs774960107
Type: single nucleotide variant
Location: chr17:50168420 (GRCh38)
Gene constraint: LOEUF 1.273 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 80.15

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

Disease context

autosomal recessive limb-girdle muscular dystrophy type 2D — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Alpha-sarcoglycan-related limb-girdle muscular dystrophy R3 (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Childhood
Prevalence: <1 / 1 000 000 (United Kingdom)

Similar variants

SGCA p.Asp144Asn Uncertain significance ★★ ⚠ same residue
SGCA c.37+6T>C Pathogenic ★★★ same condition
SGCA c.585-1G>A Pathogenic ★★★ same condition
SGCA c.957-11C>G Likely pathogenic ★★★ same condition
SGCA p.Ala107Val Likely pathogenic ★★★ ⚠ same condition
SGCA p.Arg192Ter Pathogenic ★★★ same condition
SGCA p.Arg221Cys Likely pathogenic ★★★ same condition
SGCA p.Arg221Pro 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/sgca-p-asp144 (accessed [today's date]).

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