Is PGAP1 p.Asp631Gly (c.1892A>G) pathogenic?

PGAP1 p.Asp631Gly (c.1892A>G) is classified Uncertain significance in PGAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-06-13). AlphaMissense: likely benign (0.1089); Ultra-rare (popmax 0.0113%, eas); Associated with hereditary spastic paraplegia.

What condition is associated with PGAP1 p.Asp631Gly (c.1892A>G)?

PGAP1 p.Asp631Gly (c.1892A>G) is associated with hereditary spastic paraplegia (ClinVar).

How common is PGAP1 p.Asp631Gly (c.1892A>G) in the general population?

PGAP1 p.Asp631Gly (c.1892A>G) is ultra-rare (popmax 0.0113%, eas) (gnomAD).

What do computational predictors say about PGAP1 p.Asp631Gly (c.1892A>G)?

AlphaMissense predicts likely benign (score 0.1089) — an in-silico prediction, not a clinical call.

PGAP1 p.Asp631Gly

c.1892A>G · rs753763690 · VCV1344450

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1089 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0113%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary spastic paraplegia

Computational evidence

Protein change
AlphaMissense	0.1089	likely benign
REVEL	0.089	moderately benign-leaning
SaProt	LLR -5.52	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Pangolin	Δ0.21	loss · gain 0.01 · not in the SpliceAI release · independent
Constraint at this position
Conservation	phyloP 7.6	GERP 1.3, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 85 kb · p 0.0064 · regional, not allelic
Overall
CADD	21.8	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 0.0113% East Asian · 5/44,336 alleles

Filtering AF 0.00439% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00279%

Overall 0.000312% 5/1,602,818 alleles · ultra-rare exomes 5/1,450,600 · genomes 0/152,218 · 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: PGAP1
Protein: p.Asp631Gly
Coding: c.1892A>G
MANE Select: NM_024989
dbSNP: rs753763690
Type: single nucleotide variant
Location: chr2:196848007 (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

hereditary spastic paraplegia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PGAP1 p.Ile725Asn Uncertain significance ★★ ⚠ same condition
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PGAP1 p.Phe19Leu Uncertain significance ★★ ⚠ same condition
PGAP1 p.Phe451Tyr Uncertain significance ★★ ⚠ same condition
PGAP1 p.Ser798Leu Uncertain significance ★★ ⚠ same condition
PGAP1 c.1862-3C>T Benign ★★ same condition
PGAP1 p.Ala669= Benign ★★ same condition
PGAP1 p.Asn868= Benign/Likely benign ★★ 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-asp631gly (accessed [today's date]).

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