Is SGCD p.Ser151Ala (c.451T>G) pathogenic?

SGCD p.Ser151Ala (c.451T>G) is classified Uncertain significance in SGCD (ClinVar, Multiple submitters, 14 submitters; last evaluated 2026-02-16). AlphaMissense: likely benign (0.1122); Ultra-rare (popmax 0.0539%, sas); Associated with autosomal recessive limb-girdle muscular dystrophy type 2F.

How common is SGCD p.Ser151Ala (c.451T>G) in the general population?

SGCD p.Ser151Ala (c.451T>G) is ultra-rare (popmax 0.0539%, sas) (gnomAD).

What do computational predictors say about SGCD p.Ser151Ala (c.451T>G)?

AlphaMissense predicts likely benign (score 0.1122) — an in-silico prediction, not a clinical call.

SGCD p.Ser151Ala

Q: What condition is associated with SGCD p.Ser151Ala (c.451T>G)?

SGCD p.Ser151Ala (c.451T>G) is associated with autosomal recessive limb-girdle muscular dystrophy type 2F, dilated cardiomyopathy 1L (ClinVar).

Q: How is Delta-sarcoglycan-related limb-girdle muscular dystrophy R6 inherited?

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

c.451T>G · rs121909298 · VCV8176

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 14 submitters

AlphaMissense

likely benign

0.1122 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0539%, sas)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

autosomal recessive limb-girdle muscular dystrophy type 2F

Computational evidence

Protein change
AlphaMissense	0.1122	likely benign
REVEL	0.691	pathogenic-leaning
SaProt	LLR -8.86	tolerated
⇒ REVEL calls this damaging; AlphaMissense and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.8	GERP 1.8, phastCons 1
Regional constraint	o/e 1.12	unconstrained · MANE · 430 kb · p 0.031 · regional, not allelic
Overall
CADD	23.5	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM S150A vs ClinVar S151A) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0539% South Asian · 49/90,986 alleles

Filtering AF 0.0418% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0375%

Overall 0.0223% 360/1,612,572 alleles · ultra-rare exomes 340/1,460,422 · genomes 20/152,150 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0539%	1,857
European (non-Finnish)	0.0243%	4,108
Remaining individualsnot grpmax-eligible	0.0176%	5,674
Admixed American	0.015%	6,651
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,568
Finnishnot grpmax-eligible	0.00313%	31,988
African / African-American	0.00134%	74,878

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: SGCD
Protein: p.Ser151Ala
Coding: c.451T>G
MANE Select: NM_000337
dbSNP: rs121909298
Type: single nucleotide variant
Location: chr5:156595000 (GRCh38)
Gene constraint: LOEUF 0.88 · pLI 0.05 (gnomAD)
Structure: AlphaFold pLDDT 81.43
Residue 150 UniProt numbering: a UniProt-annotated variant site (in cmd1l)

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

Disease context

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

Also linked: dilated cardiomyopathy 1L

For Delta-sarcoglycan-related limb-girdle muscular dystrophy R6 (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood
Prevalence: 1-9 / 1 000 000 (Europe)

Similar variants

SGCD p.Ser151Phe Uncertain significance ★★ ⚠ same residue
SGCD p.Arg165Ter Pathogenic ★★★ same condition
SGCD p.Arg97Ter Pathogenic ★★★ same condition
SGCD p.Arg31Trp Uncertain significance ★★★ ⚠ same condition
SGCD p.Ile64Thr Uncertain significance ★★★ ⚠ same condition
SGCD c.192+1G>A Likely pathogenic ★★ same condition
SGCD c.294+1G>A Likely pathogenic ★★ same condition
SGCD c.4-1G>T 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/sgcd-p-ser151ala (accessed [today's date]).

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