Is MOGS p.Val673Ala (c.2018T>C) pathogenic?

MOGS p.Val673Ala (c.2018T>C) is classified Uncertain significance in MOGS (ClinVar, Single submitter, 1 submitter; last evaluated 2018-12-18). AlphaMissense: likely benign (0.1108); Very rare (popmax 0.00891%, eas); Associated with MOGS-congenital disorder of glycosylation.

What condition is associated with MOGS p.Val673Ala (c.2018T>C)?

MOGS p.Val673Ala (c.2018T>C) is associated with MOGS-congenital disorder of glycosylation (ClinVar).

How common is MOGS p.Val673Ala (c.2018T>C) in the general population?

MOGS p.Val673Ala (c.2018T>C) is very rare (popmax 0.00891%, eas) (gnomAD).

How is MOGS-CDG inherited?

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

What do computational predictors say about MOGS p.Val673Ala (c.2018T>C)?

AlphaMissense predicts likely benign (score 0.1108) — an in-silico prediction, not a clinical call.

MOGS p.Val673Ala

c.2018T>C · rs1572919630 · VCV649181

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1108 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00891%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

MOGS-congenital disorder of glycosylation

Computational evidence

Protein change
AlphaMissense	0.1108	likely benign
REVEL	0.159	moderately benign-leaning
SaProt	LLR -8.70	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 1.7, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 601 bp · p 0.59 · regional, not allelic
Overall
CADD	21.2	PHRED · no single calibrated threshold — expert panels disagree

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

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00891% East Asian · 4/44,888 alleles

Filtering AF 0.00298% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0018%

Overall 0.000434% 7/1,614,160 alleles · very rare exomes 7/1,461,886 · genomes 0/152,274 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00891%	11,222
South Asian	0.0011%	91,084
European (non-Finnish)	0.000169%	590,009

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: MOGS
Protein: p.Val673Ala
Coding: c.2018T>C
MANE Select: NM_006302
dbSNP: rs1572919630
Type: single nucleotide variant
Location: chr2:74461771 (GRCh38)
Gene constraint: LOEUF 0.85 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 92.42

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

Disease context

MOGS-congenital disorder of glycosylation — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For MOGS-CDG (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

MOGS p.Val673Ile Benign/Likely benign ★★ same residue
MOGS p.Arg495Ter Pathogenic/Likely pathogenic ★★ same condition
MOGS p.Gln124Ter Pathogenic ★★ same condition
MOGS p.Gln505Ter Pathogenic/Likely pathogenic ★★ same condition
MOGS p.Ala22Glu Uncertain significance ★★ ⚠ same condition
MOGS p.Ala292Asp Uncertain significance ★★ ⚠ same condition
MOGS p.Ala292Pro Uncertain significance ★★ ⚠ same condition
MOGS p.Ala41Val 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/mogs-p-val673ala (accessed [today's date]).

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