Is SGCD p.Val166Gly (c.497T>G) pathogenic?

SGCD p.Val166Gly (c.497T>G) is classified Uncertain significance in SGCD (ClinVar, Single submitter, 1 submitter; last evaluated 2024-05-06). AlphaMissense: likely pathogenic (0.9002); Absent from gnomAD v4.1.

How common is SGCD p.Val166Gly (c.497T>G) in the general population?

SGCD p.Val166Gly (c.497T>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about SGCD p.Val166Gly (c.497T>G)?

AlphaMissense predicts likely pathogenic (score 0.9002) — an in-silico prediction, not a clinical call.

SGCD p.Val166Gly

c.497T>G · VCV3336163

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9002 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.9002	likely pathogenic
REVEL	0.946	strongly pathogenic-leaning
SaProt	LLR -13.97	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 7.8	GERP 1.8, phastCons 1
Regional constraint	o/e 1.12	unconstrained · MANE · 430 kb · p 0.031 · regional, not allelic
Overall
CADD	26.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM V165G vs ClinVar V166G) — verify the residue.

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: SGCD
Protein: p.Val166Gly
Coding: c.497T>G
MANE Select: NM_000337
Type: single nucleotide variant
Location: chr5:156595046 (GRCh38)
Gene constraint: LOEUF 0.88 · pLI 0.05 (gnomAD)
Structure: AlphaFold pLDDT 81.43

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

Similar variants

SGCD p.Arg165Ter Pathogenic ★★★ same type
SGCD p.Arg97Ter Pathogenic ★★★ same type
SGCD p.Arg31Gly Uncertain significance ★★★ ⚠ same type
SGCD p.Arg31Trp Uncertain significance ★★★ ⚠ same type
SGCD p.Ile64Thr Uncertain significance ★★★ ⚠ same type
SGCD c.192+1G>A Likely pathogenic ★★ same type
SGCD c.294+1G>A Likely pathogenic ★★ same type
SGCD c.4-1G>T Likely pathogenic ★★ same type

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-val166gly (accessed [today's date]).

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