Is PGAP1 p.Gln466Ter (c.1396C>T) pathogenic?

PGAP1 p.Gln466Ter (c.1396C>T) is classified Pathogenic in PGAP1 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-09-17). Very rare (popmax 0.00137%, afr); Associated with intellectual disability, autosomal recessive 42.

What condition is associated with PGAP1 p.Gln466Ter (c.1396C>T)?

PGAP1 p.Gln466Ter (c.1396C>T) is associated with intellectual disability, autosomal recessive 42 (ClinVar).

How common is PGAP1 p.Gln466Ter (c.1396C>T) in the general population?

PGAP1 p.Gln466Ter (c.1396C>T) is very rare (popmax 0.00137%, afr) (gnomAD).

PGAP1 p.Gln466Ter

c.1396C>T · rs143038880 · VCV222978

Pathogenic Multiple submitters

Classification

Pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.00137%, afr)

Conditions

intellectual disability, autosomal recessive 42

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 14 of 27
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.4	GERP 2, phastCons 1
Overall
CADD	37.0	PHRED · no single calibrated threshold — expert panels disagree

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00137% African / African-American · 1/73,248 alleles

Filtering AF 0.000193% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000127%

Overall 0.000454% 7/1,542,014 alleles · very rare exomes 5/1,389,856 · genomes 2/152,158 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00137%	73,248
European (non-Finnish)	0.000536%	186,458

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: PGAP1
Protein: p.Gln466Ter
Coding: c.1396C>T
MANE Select: NM_024989
dbSNP: rs143038880
Type: single nucleotide variant
Location: chr2:196875776 (GRCh38)
Gene constraint: LOEUF 0.691 · pLI 0.02 (gnomAD)
Structure: AlphaFold pLDDT 89.15

Full PGAP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

intellectual disability, autosomal recessive 42 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PGAP1 p.Gln466Arg Uncertain significance ★ ⚠ same residue
PGAP1 p.Gln555Ter Pathogenic/Likely pathogenic ★★ same condition
PGAP1 p.Tyr758Ter Pathogenic/Likely pathogenic ★★ same condition
PGAP1 p.Ala298Thr Uncertain significance ★★ ⚠ same condition
PGAP1 p.Ala714Val Uncertain significance ★★ ⚠ same condition
PGAP1 p.Arg231Gln Uncertain significance ★★ ⚠ same condition
PGAP1 p.Arg250His Uncertain significance ★★ ⚠ same condition
PGAP1 p.Arg803Cys 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/pgap1-p-gln466ter (accessed [today's date]).

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